WO2010054579A1

WO2010054579A1 - Micro-wave device radio frequency circuit and method for adjusting transmitting and receiving intervals of micro-wave device radio frequency circuit

Info

Publication number: WO2010054579A1
Application number: PCT/CN2009/074777
Authority: WO
Inventors: 黄雄斌; 王天祥; 李德军; 张海
Original assignee: 华为技术有限公司
Priority date: 2008-11-17
Filing date: 2009-11-04
Publication date: 2010-05-20
Also published as: CN101478320A

Abstract

A micro-wave device radio frequency circuit and method for adjusting transmitting and receiving intervals of a micro-wave device radio frequency circuit are provided. The circuit has a transmitting link and a receiving link. The first transmitting mixed frequency unit and the second transmitting mixed frequency unit are serially connected from a transmitting signal input end to transmitting signal output end of the transmitting link. The first receiving mixed frequency unit and the second receiving mixed frequency unit are serially connected from a receiving signal input end to receiving signal output end of the receiving link. The second transmitting mixed frequency unit is connected with the first local oscillation unit; the first receiving mixed frequency unit is connected with the second local oscillation unit. Transmitting and receiving intervals of the micro- wave device radio frequency circuit can be adjusted by respectively adjusting the first local oscillation unit and/ or the second local oscillation unit.

Description

Interval adjustment method

The embodiments of the present invention relate to the field of microwave radio frequency technologies, and in particular, to a radio frequency circuit of a microwave device and a radio frequency circuit receiving and receiving interval adjustment method of the microwave device. Background technique

Microwave transmission equipment uses the microwave frequency band to transmit signals. The use of microwave frequencies is subject to the ITU-R international standards or local standards of each country. Microwave transmission equipment is used in pairs. A pair of microwave equipment is called a hop, and the transmission of traffic between one hop microwave equipment is bidirectional. Different directions must be used in both directions to avoid interference. Between these two frequencies The difference is called Transmmiter and Receiver Interval (hereinafter referred to as TR interval). For any microwave device in one hop, it also receives the microwave signal while transmitting the microwave signal.

In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art: In the existing radio frequency circuit, on the transmitting link, the intermediate frequency signal is subjected to two mixing with the local oscillator signal to obtain a transmitting radio frequency signal. On the receiving link, the RF frequency signal is mixed with the local oscillator signal to obtain the received intermediate frequency signal. Taking the low-vibration mixing scheme as an example, and assuming that the microwave device is a high station, the TR interval of the microwave device is fixed. For a particular microwave device, it can only work at its inherent TR interval, it can't be changed, and its application range is limited. Moreover, the fixed single TR interval property causes a wide variety of microwave RF components and high cost. Summary of the invention

The embodiment of the invention provides a radio frequency circuit for a microwave device and a radio frequency circuit receiving and receiving interval adjustment method for the microwave device, which is used to solve the defects of the radio frequency circuit of the microwave device in the prior art, and the application range is limited, and the radio frequency circuit of the microwave device is transmitted and received. Flexible adjustment of the interval.

Embodiments of the present invention provide a radio frequency circuit of a microwave device, including a transmitting link and a receiving link. a first transmit mixing unit and a second transmit mixing unit are connected in series from the transmit signal input end to the transmit signal output end of the transmit link, and the receive signal input end to the receive signal output end of the receive link are serially connected a first receiving mixing unit and a second receiving mixing unit, wherein the second transmitting mixing unit is connected to the first local oscillator unit, and the first receiving mixing unit is connected to the second local oscillator unit.

An embodiment of the present invention provides a method for adjusting a transceiver interval of a radio frequency circuit of a microwave device, including: separately adjusting an output frequency of the first local oscillator unit and/or the second local oscillator unit;

On the transmitting link of the radio frequency circuit of the microwave device, the first transmitting mixing unit and the second transmitting mixing unit are sequentially applied to perform mixing processing on the transmitting signal, and then transmitted to the antenna, where the second transmitting mixing unit applies the The first local oscillator unit performs mixing processing on the transmitted signal;

After receiving the received signal from the antenna, the receiving link of the radio frequency circuit of the microwave device sequentially applies the first receiving mixing unit and the second receiving mixing unit to perform mixing processing on the received signal, and then sends the signal to the microwave device. Internally, wherein the first receiving mixing unit applies the second local oscillator unit to perform mixing processing on the received signal. In the whole method, when the second mixing process is performed on the transmitted signal and the first mixing process is performed on the received signal, the independent local oscillators are respectively used for mixing, and the output frequencies of the two independent local oscillators are adjusted by software. The purpose of adjusting the TR interval of the radio frequency circuit of the microwave device can be achieved, so that the microwave device has a wide range of TR intervals to be selected, and the appropriate TR interval is selected according to actual needs, thereby expanding the application range of the device; Supporting two or more TR intervals, the variety of microwave RF components is reduced, reducing component inventory pressure. DRAWINGS

1 is a schematic structural view of a first embodiment of a radio frequency circuit of a microwave device according to the present invention;

2 is a flow chart of an embodiment of a method for adjusting a transceiver interval of a radio frequency circuit of a microwave device according to the present invention;

3 is a schematic structural view of a second embodiment of a radio frequency circuit of a microwave device according to the present invention. detailed description

The technical solutions of the embodiments of the present invention are further described below with reference to the accompanying drawings and specific embodiments.

The microwave transmission equipment is generally used in pairs. The transmission of services between the two microwave transmission equipments is bidirectional. One of the microwave transmission equipments also receives the microwave signals while transmitting the microwave signals. In order to avoid interference, two transmissions must be guaranteed. The microwave frequency used in the direction is different, that is, there is a certain difference between the two, which is the transmission and reception (TR) interval of the radio frequency circuit of the microwave transmission device, and the TR interval of the microwave mainly depends on the radio frequency circuit of the microwave device. The central idea of the embodiment of the present invention is how to improve the radio frequency circuit of the microwave device to achieve the purpose of adjusting the TR interval.

1 is a schematic structural diagram of a first embodiment of a radio frequency circuit of a microwave device according to the present invention. As shown in FIG. 1, the radio frequency circuit of the microwave device includes a transmitting link and a receiving link, where the transmitting link is used for transmitting signals from the inside of the microwave device. Processing is performed to increase the frequency of the transmitted signal and sent to the antenna; the receiving link is used to process the signal received from the antenna, reduce the frequency of the received signal, and send it to the inside of the microwave device. The first transmitting mixing unit 1 and the second transmitting mixing unit 2 are connected in series between the transmitting signal input terminal A and the transmitting signal output terminal B of the transmitting link, that is, the signals transmitted from the inside of the microwave device are sequentially passed through After two mixing processes of the transmitting mixing unit 1 and the second transmitting mixing unit 2, the frequency of the signal is boosted to the frequency corresponding to the transmitted signal and then transmitted to the antenna. a first receiving mixing unit 3 and a second receiving mixing unit 4 are connected in series between the receiving signal input terminal C and the receiving signal output terminal D of the receiving link, that is, after receiving the signal sent by the antenna, After the two mixing processes of the receiving mixing unit 3 and the second receiving mixing unit 4, the frequency of the signal transmitted by the antenna is reduced to the frequency of the internal application of the microwave device, and then sent to the inside of the microwave device. The first transmitting mixing unit 2 is connected to the first local oscillator unit 11, and the first receiving mixing unit 3 is connected to the second local oscillator unit 12. The first local oscillator unit 11 and the second local oscillator unit 12 are independent of each other. The respective output frequencies are different, and the output frequency of the local oscillator can be adjusted by software.

Based on the structural composition of the radio frequency circuit of the microwave device, the first transmit mixing unit 1 on the transmit link and the second receive mix unit 4 on the receive link can use two independent local oscillators. In the mixing process, the same local oscillator can also be used for the mixing process. Specifically, when two mutually independent local oscillators are respectively connected to the first transmitting mixing unit 1 and the second receiving mixing unit 4, The first transmit mixing unit 1 and the third local oscillator unit may be connected, and the second receive mixing unit 4 is connected to the fourth local oscillator unit. If the first transmitting mixing unit 1 and the second receiving mixing unit 4 are connected to the same local oscillator, the first transmitting mixing unit 1 and the second receiving mixing unit 4 may be combined with the fifth The vibration unit is connected. The embodiment provides a method for the radio frequency circuit of the microwave device to connect the first transmit mixing unit 1 and the second receive mixing unit 4 to the same fifth local oscillator unit 13. As shown in FIG. 1, the IFt is a transmission. The frequency of the IF signal of the link, RFt is the frequency of the RF signal of the transmitting link, IFr is the frequency of the IF signal of the receiving link, and RFr is the frequency of the RF signal of the receiving link. In this embodiment, the low-frequency mixing scheme is taken as an example. It is also assumed that the microwave device is a high station, that is, the transmitting RF frequency is higher than the receiving RF frequency, wherein the frequency variation of the mixing process in the low local oscillator mixing scheme can be described as: output signal frequency = input signal frequency + local oscillator signal frequency, or Output signal frequency = input signal frequency - local oscillator signal frequency, then the TR interval of the microwave device RF circuit is TR = RFt - RFt = IFt + L02 - IFr - L03 where L02 is the output frequency of the first local oscillator unit 11, L03 It is the output frequency of the second local oscillation unit 12. As can be seen from the above, the purpose of adjusting the TR interval can be achieved by changing the output frequencies of the first local oscillator unit 11 and the second local oscillator unit 12 which are independent of each other. Moreover, since the positions of the first local oscillator unit 11 and the second local oscillator unit 12 in the radio frequency circuit of the microwave device are at one end of the frequency of the radio frequency signal adjacent to the radio link and the receiving link, the frequency of the signal is high, and the adjustment range of the TR interval is It is also larger and has a wider range of applications. The above is an example of a low local oscillator mixing scheme. Of course, this embodiment is also applicable to a high local oscillator mixing scheme.

Similarly, in the radio frequency circuit of the microwave device, if the first transmitting mixing unit is connected to the third local oscillator unit, and the second receiving mixing unit is connected to the fourth local oscillator unit, the TR of the microwave device radio frequency circuit is The interval is TR= IFt+L02-IFr-L03+ L04- L05, where L04 is the output frequency of the third local oscillator unit, and L05 is the output frequency of the fourth local oscillator unit. It can be seen that in the radio frequency circuit of the microwave device, If each mixing unit is connected to a local oscillator that is independent of each other, the adjustment range of the TR interval will be further improved to improve the utilization rate of the device. In order to meet the mixing requirements and filter out the spurious signal components of the mixed frequency band, a corresponding processing unit is further included in the radio frequency circuit of the microwave device, specifically, on the transmitting link, the first transmitting mixing unit

A first transmission processing unit 5 is connected between 1 and the second transmission mixing unit 2, and a second transmission processing unit 6 is connected between the second transmission mixing unit 2 and the transmission signal output terminal B. The first transmission processing unit 5 And the second transmission processing unit 6 respectively include a series connected amplifier and filter. Specifically, after the signal from the inside of the microwave device is mixed and processed by the first transmitting and mixing unit 1, the transmitting signal is amplified and filtered by the first transmitting processing unit 5, and then the transmitting signal is input to the second transmitting and mixing. The unit 2 applies the first local oscillation unit 11 to perform a second mixing process on the transmission signal; after that, the second transmission processing unit 6 further amplifies and filters the transmission signal, and then raises the frequency of the transmission signal to The required RF frequency can be transmitted through the antenna into free space.

On the receiving link, a first receiving processing unit 7 is connected between the receiving signal input terminal C and the first receiving mixing unit 3, and the first receiving mixing unit 3 and the second receiving mixing unit 4 are connected to each other. The second receiving processing unit 8; the first receiving mixing unit 3 and the second receiving mixing unit 4 comprise a cascaded filter and amplifier. Specifically, after the video signal from the antenna is received by the receiving signal input terminal C of the receiving link, the receiving signal is sequentially filtered and amplified by the first receiving processing unit 7, and then output to the first receiving mixing unit 3; The first receiving mixing unit 3 applies the second local oscillator unit to perform the first receiving mixing process, and sends the processing result to the second receiving processing unit 8 for filtering and amplifying processing, and then outputs the second receiving and mixing. The unit 4 performs the second mixing process, and after the mixing process, reduces the frequency of the received signal to the required intermediate frequency and transmits it to the inside of the microwave device.

The filter included in each of the above processing units may be a band pass filter according to actual requirements, and the operating frequency range including the amplifier and the band pass filter in the second transmission processing unit and the second receiving processing unit is required to be sufficiently wide, Covers the range of signal frequency variations due to TR interval changes.

In the radio frequency circuit of the microwave device provided by the embodiment, when the second mixing process is performed on the transmitted signal and the first mixing process is performed on the received signal, the independent local oscillator is used for mixing. By adjusting the output frequency of two independent local oscillators by software, the purpose of adjusting the TR interval of the radio frequency circuit of the microwave device can be achieved, so that the microwave device has a wide range of TR intervals to be selected, and the appropriate TR interval is selected according to actual needs, and the device is expanded. The scope of application; the same microwave RF component supports two or more TR intervals at the same time, the types of microwave RF components are reduced, and the inventory pressure of components is reduced.

2 is a flowchart of an embodiment of a method for adjusting a transceiver interval of a radio frequency circuit of a microwave device according to the present invention. As shown in FIG. 2, the method includes:

Step 200: Adjust the output frequency of the first local oscillator unit and/or the second local oscillator unit respectively. In actual use of the radio frequency circuit of the microwave device, if the TR interval needs to be changed, the method may be used for transmitting on the transmit link by, for example, software adjustment. The output frequency of the first local oscillator unit and/or the output frequency of the second local oscillator unit that is mixed on the receiving link are adjusted to change the TR interval.

Step 201: On the transmitting link of the radio frequency circuit of the microwave device, the first transmitting mixing unit and the second transmitting mixing unit are sequentially applied to perform mixing processing on the transmitting signal, and then transmitted to the antenna, where the second transmitting mixing unit is applied. a local oscillator unit performs mixing processing on the transmitted signal;

In a radio frequency circuit as one of the microwave devices of one hop, a transmitting link for transmitting a radio frequency signal to the antenna and a receiving link for receiving a signal from the antenna are included, on the transmitting link, from the signal input terminal to The signal output end is connected in series with two mixing units, which are a first transmitting mixing unit and a second transmitting mixing unit, respectively, and the signal transmitted from the device sequentially passes through the first transmitting mixing unit and the second transmitting mixing unit. After two mixing processes, the frequency of the transmitted signal is increased to match the frequency of the transmitted signal and then sent to the antenna.

Step 202: After receiving the received signal from the antenna, the receiving link of the radio frequency circuit of the microwave device sequentially applies the first receiving mixing unit and the second receiving mixing unit to perform mixing processing on the received signal, and then sends the received signal to the microwave device, where The first receiving mixing unit applies a second local oscillator unit to perform mixing processing on the received signal.

In the receiving link of the radio frequency circuit of the microwave device, two mixing units of the first receiving mixing unit and the second receiving mixing unit are serially connected from the signal input end to the signal output end, and the receiving link receives the antenna. After transmitting the radio frequency signal, the received signal is sequentially subjected to mixing processing by the first receiving mixing unit and the second receiving mixing unit, and then the frequency of the receiving signal is reduced to meet the frequency of the intermediate frequency signal used by the device, and then the signal is input. Give the microwave device the inside.

In the above mixing process of the transmitted signal and the received signal, the first local oscillator unit is mixed for the second mixing of the transmitted signal, that is, the second transmit mixing unit outputs the output from the first transmit mixing unit. The signal is mixed with the signal output from the first local oscillator unit to further increase the frequency of the transmitted signal. Applying the second local oscillator unit to the first mixing of the received signal, that is, the first receiving mixing unit performs mixing processing on the signal sent from the antenna and the signal output from the second local oscillator unit, and then reduces The frequency of the received signal is then sent to the second receive mixing unit for further processing. The first local oscillator unit and the second local oscillator unit are independent of each other, that is, the frequencies of the output signals of the two are different, and there is a certain difference, which will affect the TR interval of the microwave device. That is to say, if it is necessary to adjust the TR interval of the microwave device, the software can directly adjust the frequency of the output signals of the first local oscillator unit and the second local oscillator unit, and change the difference between the two to change the device. TR interval. Since the frequencies of the input signals at the second transmitting mixing unit and the first receiving mixing unit are both high, that is, the requirements of the radio frequency are met, the local oscillator applied by changing the two mixing units can be in a large range. Adjust the TR interval to make it more widely used and more efficient to use.

In the above embodiment of the radio frequency circuit of the microwave device, different local oscillators are used to mix the transmitting mixing unit and the receiving mixing unit at a position close to the antenna end. Further, the radio frequency circuit is close to the internal position of the device, and the first transmitting mixing is performed. The unit and the second receiving mixing unit can be mixed by applying a common local oscillator, or different local oscillators can be used for mixing. Specifically, if the first transmit mixing unit and the second receive mixing unit apply different local oscillators for mixing, the third local oscillator unit may be applied to the first transmit mixing unit to perform a mixing process on the transmit signal. And applying, by the second transmitting and mixing unit, the first local oscillator unit to perform mixing processing on the transmitting signal; the first receiving mixing unit applying the second local oscillator unit to perform mixing processing on the received signal, and then performing the second receiving The mixing unit applies a fourth local oscillator unit to perform mixing processing on the received signal. The third local oscillator unit and the fourth local oscillator unit are two different local oscillator units. Due to the difference between the first transmit mixing unit and the second receive mixing unit The local oscillator can further increase the adjustment range of the TR interval on the basis of applying different local oscillators to the second transmitting mixing unit and the first receiving mixing unit, thereby expanding the use range of the microwave device.

If the first transmit mixing unit and the second receive mixing unit apply the same local oscillator for mixing, the fifth local oscillator unit may be used to mix the transmitted signal for the first transmit mixing unit, and then pass the second The transmitting mixing unit applies the first local oscillator unit to perform mixing processing on the transmitted signal; the first receiving mixing unit applies the second local oscillator unit to perform mixing processing on the received signal, and then applies the fifth through the second receiving mixing unit. The local oscillator unit performs mixing processing on the received signal, that is, the first transmitting mixing unit and the second receiving mixing unit apply the same fifth local oscillator unit for mixing processing, wherein the frequency of the output signal of the fifth local oscillator unit is not Will affect the TR interval.

In the above embodiments, in order to satisfy the mixing requirement and filter out the spurious signal components in the mixed frequency band, the microwave device RF circuit further includes a corresponding processing unit, and on the transmitting link, the transmitting signal passes through the first transmit mix. After the frequency unit is mixed and processed, and after being mixed by the second transmitting and mixing unit, the method further comprises: performing amplification and filtering processing in sequence; on the receiving link, before receiving the signal through the first receiving mixing unit, and Before passing through the second receiving mixing unit mixing process, it further includes filtering and amplifying processing in sequence. The filter included in each of the above processing units may be a band pass filter according to actual requirements, and the operating frequency range including the amplifier and the band pass filter in the second transmission processing unit and the second receiving processing unit is required to be sufficiently wide, Covers the range of signal frequency variations due to TR interval changes.

3 is a schematic structural diagram of a second embodiment of a radio frequency circuit of a microwave device according to the present invention; and FIG. 3 is a circuit diagram corresponding to the schematic diagram of the structure of FIG. 1. As shown in FIG. 3, the radio frequency circuit of the microwave device includes a transmitting link and a receiving link. IFt is the frequency of the IF signal of the transmitting link, which is from the inside of the microwave device; RFt is the frequency of the RF signal of the transmitting link, and is sent to the antenna; IFr is the frequency of the IF signal of the receiving link, and is sent to the inside of the microwave device; RFr is the receiving chain The RF signal frequency of the road comes from the antenna. The first transmitting and mixing unit 1 and the second transmitting and mixing unit 2 are connected in series on the transmitting link, and the first transmitting and processing unit 5 is connected in series between the first transmitting and mixing unit 1 and the second transmitting and mixing unit 2 a first transmit processing unit 5 including a series connected amplifier and a band pass filter; a signal transmission at the second transmit mix unit 2 The output is also provided with a second transmission processing unit 6, which also includes a cascaded amplifier and a bandpass filter, the amplifier and the bandpass filter are required to have a wide operating frequency range; the first transmit mixing The unit 1 is connected to the fifth local oscillation unit 13, and the second transmission mixing unit 2 is connected to the first local oscillation unit 11. The first receiving mixing unit 3 and the second receiving mixing unit 4 are connected in series on the receiving link, and the first receiving processing unit 7 is serially connected to the signal input end of the first receiving mixing unit 3, first The receiving processing unit 7 sequentially includes a series of band pass filters and amplifiers, and the operating frequency range of the amplifier and the band pass filter is required to be sufficiently wide; the first receiving mixing unit 3 and the second receiving mixing unit 4 are connected in series There is a second receiving processing unit 8, which in turn comprises a series of bandpass filters and amplifiers; the first receiving mixing unit 3 is connected to the second local oscillator unit 12, and the second receiving mixing unit 4 is The fifth local oscillation unit 13 is connected. The output frequencies of the first local oscillator unit, the second local oscillator unit, and the fifth local oscillator unit are represented as L02, L03, and L01, respectively. The implementation method of adjusting the TR interval of the radio frequency circuit of the microwave device is described in detail below with reference to FIG.

On the transmit link, the IFt IF signal is first mixed with the L01 local oscillator signal for the first time. The purpose of mixing is to initially raise the signal frequency to prepare for the second mixing. After the first mixing, the signal is amplified and filtered. The main purpose of this step is to amplify the signal power and filter out the spurious signal components from the mixed frequency band. The filtered signal is mixed with the L02 local oscillator for a second time. After this mixing, the signal frequency is raised to the desired RF frequency, RFt, which can be transmitted to the free space through the antenna. In this step, since the transmission and reception respectively use different local oscillators, the output frequencies L02 and L03 are independent of each other, thus affecting the TR interval. The signal after the second mixing is amplified by the amplifier 62, filtered by the band pass filter 61, and then transmitted to the antenna. The purpose of signal amplification is to further increase the transmission power, which is beneficial for long-distance transmission of signals. The function of filtering is to filter out the spurious signal components introduced by the mixing and improve the spectral purity of the output signal. This step is related to the software adjustable TR interval function. When the TR interval changes, it means that the RF frequency of the transmitting or receiving is changed, or both are changed at the same time, and the working center frequency of the amplifier and the band pass filter is fixed and cannot be changed. Therefore, when the TR interval is changed, the signal passes. The amplifier and the band pass filter are not distorted or deteriorated, and the operating frequency range of the amplifier 62 and the band pass filter 61 is necessarily required to be sufficiently wide. To cover the range of signal frequency variations due to TR interval changes. This requirement is relatively easy to achieve by properly selecting the device and properly designing the amplification and filter circuits.

On the receive link, the RFr RF frequency is first filtered by a bandpass filter 71 and then amplified by an amplifier 72. The purpose of filtering is to filter out interference signals of other frequencies that may exist in free space. The amplification function is to compensate the attenuation of the signal in free space, which is convenient for further processing of subsequent circuits. This step is related to the software-adjustable TR interval and requires a bandpass filter 71 and amplifier 72 to have a wide enough operating frequency range for the same reason as the last step of the transmit link, and will not be described again. The amplified signal is mixed with the L03 local oscillator signal for the first time. After this mixing, the signal frequency is initially reduced. In this step, since the transmission and reception respectively use different local oscillators, the frequencies of the respective outputs are independent of each other, thus affecting the TR interval and how it affects. The signal after the first mixing is filtered and amplified. The purpose of the filtering is to filter out the components of the spurious signals generated during the mixing process, and the effect of the amplification is to further amplify the signal power. The amplified signal is mixed with L01 for the second time of the receive chain. The purpose of the mixing is to further reduce the signal frequency. For ease of link design, L01 is designed for fixed output frequency, while L02 and L03 are software adjustable output frequencies. Taking the low-vibration mixing scheme as an example, and assuming that the microwave device in question is a high station, the following frequency relationship can be obtained: RFt=IFt+L01+L02, RFr=IFr+L01+L03, then TR spacing=RFt-RFr= IFt+L02-IFr-L03, since the IFt and IFr frequencies are fixed, and L02 and L03 can change their frequency values by software, it can be seen from the above formula that the TR interval can be changed by software.

At the same time, in order to make the software adjust the TR interval function, in addition to meeting the above formula, it must also be satisfied: L02 and L03 can be changed by software enough frequency range. If the range of frequencies that can be changed is small, the range in which the TR interval can be changed is also very limited, and this function loses its practical meaning. This can be easily satisfied by properly selecting the device. The operating frequency range of the amplifier 62 and the amplifier 72 and the band pass filter 61 and the band pass filter 71 is sufficiently wide. In the whole method, the second mixing process is performed on the transmitted signal and the received signal is first mixed. In the frequency processing, the independent local oscillator is used for mixing, and the output frequency of the two independent local oscillators is adjusted by software, so that the TR interval of the radio frequency circuit of the microwave device can be adjusted, so that the microwave device has a wide range of TR intervals. Selecting, according to the actual needs, selecting the appropriate TR interval, expanding the application range of the device, and responding to the need to change the TR interval in an emergency; enabling the same microwave RF component to simultaneously support two or more TR intervals, and the types of microwave RF components can be selected. Reduced, reduced inventory pressure on components.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., which can store various program codes. Finally, the above embodiments are only used to illustrate the technical solution of the present invention. The invention is described in detail with reference to the foregoing embodiments, and those of ordinary skill in the art should understand that the technical solutions described in the foregoing embodiments may be modified or some of the techniques may be The features are equivalent to the equivalents; and the modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A radio frequency circuit of a microwave device, comprising a transmitting link and a receiving link, wherein a first transmitting mixing unit and a second transmitting mixing unit are serially connected to a transmitting signal input end to a transmitting signal output end of the transmitting link, The receiving signal input end of the receiving link and the receiving signal output end are connected in series with a first receiving mixing unit and a second receiving mixing unit, wherein the second transmitting mixing unit and the first local oscillator unit are Connected, the first receiving mixing unit is connected to the second local oscillator unit.

The radio frequency circuit of the microwave device according to claim 1, wherein the first transmit mixing unit is connected to the third local oscillator unit, and the second receive mixing unit is connected to the fourth local oscillator unit; Or the first transmit mixing unit and the second receive mixing unit are connected in common to the fifth local oscillator unit.

The radio frequency circuit of the microwave device according to claim 1 or 2, wherein a first transmission processing unit is connected between the first transmission mixing unit and the second transmission mixing unit, A second transmit processing unit is coupled between the second transmit mixing unit and the transmit signal output; the first transmit processing unit and the second transmit processing unit respectively include a series connected amplifier and filter.

4. The microwave device radio frequency circuit according to claim 3, wherein the filter is a band pass filter.

The radio frequency circuit of the microwave device according to claim 1 or 2, wherein a first receiving processing unit is connected between the receiving signal input end and the first receiving mixing unit, and the first receiving mixing is performed. A second receiving processing unit is coupled between the unit and the second receiving mixing unit; the first receiving mixing unit and the second receiving mixing unit comprise a series connected filter and amplifier.

6. The microwave device radio frequency circuit according to claim 5, wherein the filter is a band pass filter.

A method for adjusting a transceiver interval of a radio frequency circuit of a microwave device, comprising: separately adjusting an output frequency of the first local oscillator unit and/or the second local oscillator unit;

On the transmitting link of the radio frequency circuit of the microwave device, the first transmitting mixing unit and the second transmitting are sequentially applied. After the mixing and mixing unit performs the mixing processing on the transmitting signal, transmitting to the antenna, wherein the second transmitting and mixing unit applies the first local oscillator unit to perform mixing processing on the transmitted signal;

After receiving the received signal from the antenna, the receiving link of the radio frequency circuit of the microwave device sequentially applies the first receiving mixing unit and the second receiving mixing unit to perform mixing processing on the received signal, and then sends the signal to the microwave device. Internally, wherein the first receiving mixing unit applies the second local oscillator unit to perform mixing processing on the received signal.

8. The method for adjusting a transceiver interval of a radio frequency circuit of a microwave device according to claim 7, wherein:

The sequentially applying the first transmit mixing unit and the second transmit mixing unit to perform a mixing process on the transmit signal includes: the first transmit mixing unit applies a third local oscillator unit to perform a mixing process on the transmit signal, and then Applying, by the second transmit mixing unit, the first local oscillator unit to perform a mixing process on the transmit signal;

The sequentially applying the first receiving mixing unit and the second receiving mixing unit to perform mixing processing on the received signal includes: the first receiving mixing unit applying the second local oscillator unit to mix the received signal After the processing, the fourth localizing unit is applied to the second receiving unit to perform a mixing process on the received signal.

9. The method for adjusting a transceiver interval of a radio frequency circuit of a microwave device according to claim 7, wherein:

The sequentially applying the first transmit mixing unit and the second transmit mixing unit to perform a mixing process on the transmit signal includes: the first transmit mixing unit applies a fifth local oscillator unit to perform a mixing process on the transmit signal, and then Applying, by the second transmit mixing unit, the first local oscillator unit to perform a mixing process on the transmit signal;

The sequentially applying the first receiving mixing unit and the second receiving mixing unit to perform mixing processing on the received signal includes: the first receiving mixing unit applying the second local oscillator unit to mix the received signal After the processing, the fifth localizing unit is applied to the second receiving unit to perform the mixing processing on the received signal.

10. The method for adjusting a transceiver interval of a radio frequency circuit of a microwave device according to claim 7 or 8 or 9, wherein:

After the transmitting signal is subjected to the mixing processing by the first transmitting and mixing unit, and after the mixing processing by the second transmitting and mixing unit, the transmitting signal further includes performing amplification and filtering processing in sequence;

And on the receiving link, before the receiving signal is subjected to the mixing processing by the first receiving mixing unit, and before the mixing processing by the second receiving mixing unit, the filtering and the amplifying processing are sequentially performed.