CN101771424B - Radio-frequency circuit for wireless signal transceiver and related wireless signal transceiver - Google Patents
Radio-frequency circuit for wireless signal transceiver and related wireless signal transceiver Download PDFInfo
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- CN101771424B CN101771424B CN2009100000320A CN200910000032A CN101771424B CN 101771424 B CN101771424 B CN 101771424B CN 2009100000320 A CN2009100000320 A CN 2009100000320A CN 200910000032 A CN200910000032 A CN 200910000032A CN 101771424 B CN101771424 B CN 101771424B
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Abstract
The invention relates to a radio-frequency circuit for a wireless signal transceiver and a related wireless signal transceiver. The wireless signal transceiver receives a first wireless signal to be converted to a second wireless signal. The radio-frequency circuit comprises a transmission line with a first end and a second end, a receiving antenna coupled with the first end of the transmission line, a transmitting antenna coupled with the first end of the transmission line, a first filter circuit coupled with the second end of the transmission line and the wireless signal transceiver and a second filter circuit coupled with the second end of the transmission line and the wireless signal transceiver, wherein the receiving antenna receives the first wireless signal; the transmitting antenna transmits the second wireless signal; the first filter circuit filters out the first wireless signal; and the second filter circuit filters out the second wireless signal. By the first filter circuit and the second filter circuit, the radio-frequency circuit ensures the transceiving efficiency of the receiving antenna and the transmitting antenna and avoids the mutual interference of the signals. Accordingly, the radio-frequency circuit only needs a single transmission line to transmit satellite signals and frequency-modulated signals, avoiding the feeling of clutter, and increasing the convenience for use.
Description
Technical field
The present invention relates to a kind of radio circuit for a wireless signal transceiver and related wireless signal transceiver thereof, relate in particular to a kind of antenna receiving-sending efficient of guaranteeing, avoid radio circuit and the related wireless signal transceiver thereof of wireless signal phase mutual interference.
Background technology
Satellite broadcasting (Satellite Radio) technology is the third generation broadcasting after amplitude modulation, FM broadcasting, it can pass through better frequency spectrum service efficiency, solving for a long time, broadcasting station channel obtains hard problem, while reaches additional all function of data, services such as the tonequality as the CD, also can satisfy people for the broadcast medium multiple demands.Therefore, satellite broadcasting has the trend that replaces analog broadcasting.
The employed correlation technique of broadcasting-satellite system (such as modulation, coding) has very large difference with traditional amplitude modulation, frequency modulation broadcast system, and therefore, traditional amplitude modulation, FM broadcasting demodulator (broadcast receiver) can't be applicable to broadcasting-satellite system.In other words, the user need buy a satellite broadcasting demodulator (or receiver), can listen to digital broadcast program.Yet, for the motor multimedia system and since the motor multimedia system be integrated in the car shell, in-built in, cause the user to listen to onboard the satellite broadcasting program by the mode of changing the satellite broadcasting demodulator.
Therefore, in order to be compatible with existing automobile-used FM broadcasting demodulator, known technology has developed a kind of automobile-used satellite broadcast reception converter, it not only has the function of satellite broadcasting demodulator, the function that has simultaneously frequency-modulated transmitter, be used for the content of satellite broadcasting is emitted to automobile-used FM broadcasting demodulator with the form of FM signal, so that the content that the passenger can listen to by vehicle sound equipment satellite broadcasting on the car.For instance, please refer to Fig. 1, Fig. 1 is the schematic diagram of known one automobile-used satellite broadcast reception converter 10.Automobile-used satellite broadcast reception converter 10 includes a satellite earth antenna 100, a satellite broadcasting demodulation module 102, an audio processing modules 104, a frequency modulation modulation module 106 and a FM transmission antenna 108.Satellite broadcast signal is processed through satellite broadcasting demodulation module 102 after being received by satellite earth antenna 100, is converted to the fundamental frequency audio signal.Audio processing modules 104 can connect (not being plotted among Fig. 1) such as loudspeaker, earphones, in order to play out the content of satellite broadcasting; Perhaps, by frequency modulation modulation module 106, be converted to FM signal, and be emitted in the air through FM transmission antenna 108.In other words, automobile-used satellite broadcast reception converter 10 can be emitted to automobile-used FM broadcasting demodulator with the form of FM signal with the content of satellite broadcasting, so that the passenger can listen to by vehicle sound equipment the content of satellite broadcasting on the car, and do not need to change the originally interior multimedia system of car.
Therefore, by automobile-used satellite broadcast reception converter 10, the user does not need to change the originally interior multimedia system of car, can listen to the satellite broadcasting program.Yet as shown in Figure 1, automobile-used satellite broadcast reception converter 10 needs at least by two transmission lines L_1, L_2, is used for respectively transmitting satellite signal and FM signal.Such design also causes the inconvenience when using easily except meeting causes mixed and disorderly sensation.If transmission line L_1, L_2 are fixed or tangle up, then may affect the effect of frequency modulation emission.Main cause is, frequent section transmitting power is all exchanged by existing various countries telecommunication management office (such as FCC) certain standard; Therefore, in the situation of transmit power limited, the FM signal that FM transmission antenna 108 is launched very easily is disturbed, thereby transmission line L_1, L_2 can't be fixed or tangle up.
In brief, known automobile-used satellite broadcast reception converter needs to come transmitting satellite signal and FM signal by two transmission lines at least, except meeting causes mixed and disorderly sensation, also causes easily the inconvenience when using.
Summary of the invention
Therefore, the invention provides a kind of radio circuit for a wireless signal transceiver and related wireless signal transceiver thereof.
The present invention discloses a kind of radio circuit for a wireless signal transceiver, this wireless signal transceiver is used for receiving one first wireless signal and converts it to one second wireless signal, this radio circuit includes a transmission line, includes a first end and one second end; One reception antenna is coupled to this first end of this transmission line, is used for receiving this first wireless signal; One transmitting antenna is coupled to this first end of this transmission line, is used for launching this second wireless signal; One first filter circuit is coupled between this second end and this wireless signal transceiver of this transmission line, is used for filtering out this first wireless signal; And one second filter circuit, be coupled between this second end and this wireless signal transceiver of this transmission line, be used for filtering out this second wireless signal.
The present invention also discloses a kind of wireless signal transceiver, includes a demodulation module, is used for demodulation one first wireless signal, to produce a demodulation result; One processing module is coupled to this demodulation module, is used for processing this demodulation result of this demodulation module, to produce a result; One modulation module is coupled to this processing module, is used for modulating this result of this processing module, to produce one second wireless signal; And a radio circuit, include a transmission line, include a first end and one second end; One reception antenna is coupled to this first end of this transmission line, is used for receiving this first wireless signal; One transmitting antenna is coupled to this first end of this transmission line, is used for launching this second wireless signal; One first filter circuit is coupled between this second end and this demodulation module of this transmission line, is used for filtering out this first wireless signal; And one second filter circuit, be coupled between this second end and this modulation module of this transmission line, be used for filtering out this second wireless signal.
The present invention is by the first filter circuit and the second filter circuit, guarantee the transmitting-receiving efficient of reception antenna and transmitting antenna, avoid the mutual interference of signal phase, thereby only need to come transmitting satellite signal and FM signal with the single transmission line, to avoid mixed and disorderly sensation, promote the convenience when using.
Description of drawings
Fig. 1 is the schematic diagram of a known automobile-used satellite broadcast reception converter.
Fig. 2 is the schematic diagram of a wireless signal transceiver of the embodiment of the invention.
Fig. 3 is the schematic diagram of a variant embodiment of a radio circuit among Fig. 2.
The primary clustering symbol description:
10 automobile-used satellite broadcast reception converter 206 radio circuits
100 satellite earth antennas, 208 reception antennas
102 satellite broadcasting demodulation modules, 210 transmitting antennas
104 audio processing modules L transmission lines
106 frequency modulation modulation modules, 212 first filter circuits
108 FM transmission antenna, 214 second filter circuits
L_1, L_2 transmission line RF_1, RF_2 wireless signal
20 wireless signal transceivers, 300 match circuits
200 demodulation modules 302,304 filter circuits
202 processing module C0, C1, C2, C3, C4 electric capacity
204 modulation module L1, L3, L4 inductance
Embodiment
Please refer to Fig. 2, Fig. 2 is the schematic diagram of a wireless signal transceiver 20 of the embodiment of the invention.Wireless signal transceiver 20 preferably can be realized an automobile-used satellite broadcast reception converter, is used for the content of satellite broadcasting is emitted to automobile-used FM broadcasting demodulator with the form of FM signal.Wireless signal transceiver 20 includes a demodulation module 200, a processing module 202, a modulation module 204 and a radio circuit 206.Radio circuit 206 is used for processing radiofrequency signal, and it includes a reception antenna 208, a transmitting antenna 210, a transmission line L, one first filter circuit 212 and one second filter circuit 214.The working method of wireless signal transceiver 20 is as follows.At first, reception antenna 208 is used for receiving a wireless signal RF_1, is sent to the first filter circuit 212 through transmission line L.The first filter circuit 212 is used for carrying out filtering and processes, to filter out wireless signal RF_1 and to be sent to demodulation module 200.The working method of demodulation module 200, processing module 202 and modulation module 204 is similar to satellite broadcasting demodulation module 102, audio processing modules 104 and the frequency modulation modulation module 106 of Fig. 1, that is, demodulation module 200 is used for demodulation wireless signal RF_1, processing module 202 is used for processing the demodulation result of demodulation module 200, and modulation module 204 is used for the result of modulation treatment module 202, to produce a wireless signal RF_2.The second filter circuit 214 can be carried out filtering and process, and filtering out wireless signal RF_2, and is sent to transmitting antenna 210 by transmission line L, and then wireless signal RF_2 is emitted in the air.
In brief, in wireless signal transceiver 20, radio circuit 206 only needs single transmission line L, and cooperates the filtering work of the first filter circuit 212 and the second filter circuit 214, can receive wireless signal RF_1 by reception antenna 208, and by transmitting antenna 210 wireless signal emission RF_2.In this case, except can avoiding mixed and disorderly sensation, can guarantee the transmitting-receiving efficient of reception antenna 208 and transmitting antenna 210 simultaneously, avoid the phase mutual interference of wireless signal RF_1, RF_2.Wherein, preferably, wireless signal RF_1 is satellite broadcast signal, and wireless signal RF_2 is fm broadcast signal.
As previously mentioned, for the motor multimedia system since the motor multimedia system be integrated in the car shell, in-built in, cause the user to listen to onboard the satellite broadcasting program by the mode of changing the satellite broadcasting demodulator.In this case, as long as by wireless signal transceiver 20 of the present invention, the content of satellite broadcasting can be emitted to automobile-used FM broadcasting demodulator with the form of FM signal.Because radio circuit 206 only needs single transmission line L, can avoid mixed and disorderly sensation, promote the convenience when using.Moreover, cooperating the filtering work of the first filter circuit 212 and the second filter circuit 214, radio circuit 206 can be guaranteed the transmitting-receiving efficient of reception antenna 208 and transmitting antenna 210, avoids the mutual interference of signal phase, to promote signal quality.
Should be noted, Figure 2 shows that the schematic diagram of one embodiment of the invention, those of ordinary skills should do different modifications accordingly, and are not limited to this.For instance, please refer to Fig. 3, Fig. 3 is the schematic diagram of an alternate embodiment of radio circuit 206 among Fig. 2.Comparison diagram 3 and Fig. 2 as can be known, in Fig. 3, the first filter circuit 212 is comprised of an inductance L 3 and a capacitor C 3, and the second filter circuit 214 is comprised of an inductance L 4 and a capacitor C 4, relevant coupling mode as scheme upper shown in.In addition, a match circuit 300 and filter circuit 302,304 have been increased in the radio circuit 206.Match circuit 300 is comprised of an inductance L 2 and a capacitor C 2, is used for carrying out matching treatment.Filter circuit 302 is realized by a capacitor C 0, between reception antenna 208 and transmission line L, is used for wireless signal RF_1 is carried out filtering.Filter circuit 304 is comprised of an inductance L 1 and a capacitor C 1, between transmitting antenna 210 and transmission line L, is used for wireless signal RF_2 is carried out filtering.
On the other hand, in Fig. 3, the characteristic of each assembly, inductance value such as the capacitance of capacitor C 0, C1, C2, C3, C4 and inductance L 1, L3, L4, should cooperate the characteristic such as frequency range, bandwidth of wireless signal RF_1, RF_2 to adjust, this is well known to those of ordinary skill in the art, so do not give unnecessary details.In addition, Fig. 3 only shows a possibility variant embodiment of radio circuit 206, and those of ordinary skills should be required according to system, does suitable modification, and be not limited to this.
In known technology, in the situation of transmit power limited, automobile-used satellite broadcast reception converter need to come transmitting satellite signal and FM signal by two transmission lines, except meeting causes mixed and disorderly sensation, also causes easily the inconvenience when using.Under comparing, the present invention is by the first filter circuit 212 and the second filter circuit 214, guarantee the transmitting-receiving efficient of reception antenna 208 and transmitting antenna 210, avoid the mutual interference of signal phase, thereby only need to come transmitting satellite signal and FM signal with single transmission line L, to avoid mixed and disorderly sensation, promote the convenience when using.
In sum, by the filtering work of the first filter circuit 212 and the second filter circuit 214, the present invention only needs single transmission line L, can receive wireless signal RF_1 by reception antenna 208, and by transmitting antenna 210 wireless signal emission RF_2.In this case, except can avoiding mixed and disorderly sensation, can guarantee the transmitting-receiving efficient of reception antenna 208 and transmitting antenna 210 simultaneously, avoid the phase mutual interference of wireless signal RF_1, RF_2.
The above only is preferred embodiment of the present invention, and every equivalent variations that claims scope is done according to the present invention and modification all should belong to covering scope of the present invention.
Claims (20)
1. radio circuit that is used for a wireless signal transceiver, described wireless signal transceiver is used for receiving one first wireless signal and described the first wireless signal is converted to one second wireless signal, and described radio circuit comprises:
One transmission line comprises a first end and one second end;
One reception antenna is coupled to the described first end of described transmission line, is used for receiving described the first wireless signal;
One transmitting antenna is coupled to the described first end of described transmission line, is used for launching described the second wireless signal;
One first filter circuit is coupled between described second end and described wireless signal transceiver of described transmission line, is used for filtering out described the first wireless signal; And
One second filter circuit is coupled between described second end and described wireless signal transceiver of described transmission line, is used for filtering out described the second wireless signal.
2. radio circuit as claimed in claim 1, wherein said the first filter circuit comprises:
One inductance is coupled between described second end and described wireless signal transceiver of described transmission line; And
One electric capacity is coupled between described second end and described wireless signal transceiver of described transmission line.
3. radio circuit as claimed in claim 1, wherein said the second filter circuit comprises:
One electric capacity is coupled between described wireless signal transceiver and the ground end; And
One inductance, described inductance one end is coupled to described second end of described transmission line, and the other end is coupled to described electric capacity and described wireless signal transceiver.
4. radio circuit as claimed in claim 1, described radio circuit also comprises a match circuit, one end of described match circuit is coupled to the described first end of described transmission line, and the other end is coupled to described second end of described transmission line, described the first filter circuit and described the second filter circuit.
5. radio circuit as claimed in claim 4, wherein said match circuit comprises:
One electric capacity is coupled between the described first end and a ground end of described transmission line; And
One inductance, described inductance one end is coupled to described first end and the described electric capacity of described transmission line, and the other end is coupled to described second end of described transmission line, described the first filter circuit and described the second filter circuit.
6. radio circuit as claimed in claim 1, described radio circuit also comprises a filter circuit, is coupled between the described first end of described reception antenna and described transmission line.
7. radio circuit as claimed in claim 6, wherein said filter circuit is an electric capacity.
8. radio circuit as claimed in claim 1, described radio circuit also comprises a filter circuit, is coupled between the described first end of described transmitting antenna and described transmission line.
9. radio circuit as claimed in claim 8, wherein said filter circuit comprises:
One electric capacity is coupled between described transmitting antenna and the ground end; And
One inductance, described inductance one end is coupled to the described first end of described transmission line, and the other end is coupled to described transmitting antenna and described electric capacity.
10. radio circuit as claimed in claim 1, wherein said the first wireless signal is satellite broadcast signal, described the second wireless signal is fm broadcast signal.
11. a wireless signal transceiver comprises:
One demodulation module is used for demodulation one first wireless signal, to produce a demodulation result;
One processing module is coupled to described demodulation module, is used for processing the described demodulation result of described demodulation module, to produce a result;
One modulation module is coupled to described processing module, is used for modulating the described result of described processing module, to produce one second wireless signal; And
One radio circuit comprises:
One transmission line comprises a first end and one second end;
One reception antenna is coupled to the described first end of described transmission line, is used for receiving described the first wireless signal;
One transmitting antenna is coupled to the described first end of described transmission line, is used for launching described the second wireless signal;
One first filter circuit is coupled between described second end and described demodulation module of described transmission line, is used for filtering out described the first wireless signal; And
One second filter circuit is coupled between described second end and described modulation module of described transmission line, is used for filtering out described the second wireless signal.
12. wireless signal transceiver as claimed in claim 11, wherein said the first filter circuit comprises:
One inductance is coupled between described second end and described demodulation module of described transmission line; And
One electric capacity is coupled between described second end and described demodulation module of described transmission line.
13. wireless signal transceiver as claimed in claim 11, wherein said the second filter circuit comprises:
One electric capacity is coupled between described modulation module and the ground end; And
One inductance, described inductance one end is coupled to described second end of described transmission line, and the other end is coupled to described electric capacity and described modulation module.
14. wireless signal transceiver as claimed in claim 11, described wireless signal transceiver also comprises a match circuit, one end of described match circuit is coupled to the described first end of described transmission line, and the other end is coupled to described second end of described transmission line, described the first filter circuit and described the second filter circuit.
15. wireless signal transceiver as claimed in claim 14, wherein said match circuit comprises:
One electric capacity is coupled between the described first end and a ground end of described transmission line; And
One inductance, described inductance one end is coupled to described first end and the described electric capacity of described transmission line, and the other end is coupled to described second end of described transmission line, described the first filter circuit and described the second filter circuit.
16. wireless signal transceiver as claimed in claim 11, described wireless signal transceiver also comprises a filter circuit, is coupled between the described first end of described reception antenna and described transmission line.
17. wireless signal transceiver as claimed in claim 16, wherein said filter circuit are an electric capacity.
18. wireless signal transceiver as claimed in claim 11, described wireless signal transceiver also comprises a filter circuit, is coupled between the described first end of described transmitting antenna and described transmission line.
19. wireless signal transceiver as claimed in claim 18, wherein said filter circuit comprises:
One electric capacity is coupled between described transmitting antenna and the ground end; And
One inductance, described inductance one end is coupled to the described first end of described transmission line, and the other end is coupled to described transmitting antenna and described electric capacity.
20. wireless signal transceiver as claimed in claim 11, wherein said the first wireless signal is satellite broadcast signal, and described the second wireless signal is fm broadcast signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100000320A CN101771424B (en) | 2009-01-05 | 2009-01-05 | Radio-frequency circuit for wireless signal transceiver and related wireless signal transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100000320A CN101771424B (en) | 2009-01-05 | 2009-01-05 | Radio-frequency circuit for wireless signal transceiver and related wireless signal transceiver |
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| Publication Number | Publication Date |
|---|---|
| CN101771424A CN101771424A (en) | 2010-07-07 |
| CN101771424B true CN101771424B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100000320A Active CN101771424B (en) | 2009-01-05 | 2009-01-05 | Radio-frequency circuit for wireless signal transceiver and related wireless signal transceiver |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215278A (en) * | 2010-07-30 | 2011-10-12 | 惠州Tcl移动通信有限公司 | Mobile terminal integrating two antennae into a whole and antenna control device thereof |
Citations (4)
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| US5864579A (en) * | 1996-07-25 | 1999-01-26 | Cd Radio Inc. | Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation |
| EP1065815A2 (en) * | 1999-07-01 | 2001-01-03 | Terion, Inc. | Transmission protocol for data transmitted on a subcarrier of a frequency modulated broadcast transmission |
| CN1443007A (en) * | 2001-09-28 | 2003-09-17 | Lg电子株式会社 | Equipment for transmitting and receiving MPEG data using radio LAN |
| CN1881810A (en) * | 2005-06-06 | 2006-12-20 | 株式会社瑞萨科技 | Radio frequency circuit for multi-mode operation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070281626A1 (en) * | 2006-06-05 | 2007-12-06 | Dobosz Paul J | Vehicle telematics satellite data transceiver utilizing fm radio circuitry |
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2009
- 2009-01-05 CN CN2009100000320A patent/CN101771424B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5864579A (en) * | 1996-07-25 | 1999-01-26 | Cd Radio Inc. | Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation |
| EP1065815A2 (en) * | 1999-07-01 | 2001-01-03 | Terion, Inc. | Transmission protocol for data transmitted on a subcarrier of a frequency modulated broadcast transmission |
| CN1443007A (en) * | 2001-09-28 | 2003-09-17 | Lg电子株式会社 | Equipment for transmitting and receiving MPEG data using radio LAN |
| CN1881810A (en) * | 2005-06-06 | 2006-12-20 | 株式会社瑞萨科技 | Radio frequency circuit for multi-mode operation |
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| CN101771424A (en) | 2010-07-07 |
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