CN1110123C - Medium frequency output-less bridge balance mixer with monochip IC and microwave FET - Google Patents
Medium frequency output-less bridge balance mixer with monochip IC and microwave FET Download PDFInfo
- Publication number
- CN1110123C CN1110123C CN98115816A CN98115816A CN1110123C CN 1110123 C CN1110123 C CN 1110123C CN 98115816 A CN98115816 A CN 98115816A CN 98115816 A CN98115816 A CN 98115816A CN 1110123 C CN1110123 C CN 1110123C
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- radio
- bridge
- effect transistor
- frequency
- field
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Abstract
The present invention relates to a balanced mixer with a microwave field-effect transistor and without a medium frequency output electric bridge. Because of having no medium frequency output electric bridge, a circuit area is reduced greatly, and thus, monolithic integration can be realized. The balanced mixer of the present invention uses two radio-frequency input electric bridges or a phase shifter at the radio-frequency input end for making the amplitude value of radio-frequency signals added into the field-effect transistor equal to the amplitude value of local oscillation voltage, and phase positions are opposite. In this way, good performance can be obtained at the medium frequency input end without the electric bridge likewise. Because the frequency of the radio-frequency end is high, the size of the used electric bridge or the phase shifter is obviously small, and thus, the monolithic integration can be carried out.
Description
The present invention be a kind of can single chip integrated microwave signal frequency conversion parts.
Microwave mixer is the vitals in the microwave systems such as communication, radar, electronic instrument.The microwave field effect transnistor balanced mixer is owing to have higher conversion gain, and the rejection of local oscillator noise and image frequency component is subjected to paying attention to widely preferably.But in the metal-semiconductor field effect transistor balanced mixer of using, need electric bridge at rf inputs and realize that the level of radiofrequency signal and local oscillator input distributes and mutual isolation at present.Also need electric bridge at medium frequency output end and realize the addition of intermediate-freuqncy signal and the inhibition of local oscillator noise and image frequency component.These two electric bridges will occupy sizable area on chip, especially in low-converter, the frequency of intermediate frequency is lower, and the size of output electric bridge will be in a centimetre magnitude.Therefore, circuit is can't monolithic integrated.
The microwave field effect transnistor balanced mixer that the purpose of this invention is to provide a kind of zero intermediate frequency output electric bridge, because zero intermediate frequency output electric bridge, the area of circuit will greatly reduce, thereby just can realize that monolithic is integrated.
The present invention realizes that as follows the radiofrequency signal of this microwave field effect transnistor balanced mixer (RF) is divided into the signal that the two-way amplitude equates through first power splitter, adds to the input of two radio frequency input bridges respectively.Local oscillation signal (LO) is divided into the signal that the two-way amplitude equates through second power splitter, adds to the input of two radio frequency input bridges respectively.The first radio frequency input bridge phase shift is that output and the 1st field-effect transistor of 0 ° joins, the second radio frequency input bridge phase shift is that output and the 2nd field-effect transistor of 180 ° joins, the input of two field-effect transistors and filter joins, and obtains output signal by filter output.
The field-effect transistor balanced mixer of zero intermediate frequency output electric bridge is with two power splitters and electric bridge or only make radio-frequency input signals and local oscillation signal be divided into amplitude separately with two phase splitters to equate at rf inputs, two signals that phase place is opposite are added in respectively on two field effect body pipes.The direct addition of the output signal of two pipes need not intermediate frequency output electric bridge, can curb local oscillator and image frequency signal, obtains the intermediate frequency output signal of addition.By not needing intermediate frequency output electric bridge, and radio frequency and local frequency are significantly higher, and radio frequency input bridge size is less, and circuit significantly reduces (can reduce to below 1/10) in shared size on the chip, thereby just can monolithic integrated.
Below in conjunction with accompanying drawing in detail optimum implementation of the present invention is described in detail.First power splitter [1], second power splitter [2], the first radio frequency input bridge [3], the second radio frequency input bridge [4], first field-effect transistor [5], second field-effect transistor [6], matched impedance [7], [8], filter [9] in the accompanying drawing 1.Radio frequency number (RF) is divided into the signal that the two-way amplitude equates through first power splitter among the figure, add to the input of two radio frequency input bridges respectively, local oscillation signal (RF) is divided into the input that the equal signal of two-way amplitude adds to two radio frequency input bridges respectively through first power splitter.Local oscillation signal (LO) is divided into the signal that the two-way amplitude equates through second power splitter, and the signal that amplitude equates adds to the input of two radio frequency input bridges respectively.Two outputs that is to say first power splitter [1] and second power splitter [2] intersect with the input of second radio-frequency bridge [4] with the first radio frequency input bridge [3] respectively and are connected, the first radio frequency input bridge [3] and the second radio frequency input bridge [4] respectively have an output through matched impedance ground connection, radio frequency input bridge [3], [4] another output separately is connected with the grid of [6] with field-effect transistor [5] respectively, field-effect transistor [5], [6] input with filter [9] after drain electrode is joined joins, the output of filter obtains the intermediate frequency output signal, field effect transistor [5], [6] source ground.
Claims (1)
- A kind of zero intermediate frequency output electric bridge microwave field effect transnistor balanced mixer that constitutes by field-effect transistor etc., two outputs that it is characterized in that first power splitter [1] and second power splitter [2] intersect with the input of second radio-frequency bridge [4] with the first radio frequency input bridge [3] respectively and are connected, the first radio frequency input bridge [3] and the second radio frequency input bridge [4] respectively have an output through matched impedance [7], [8] ground connection, radio frequency input bridge [3], [4] another output separately is connected with the grid of [6] with field-effect transistor [5] respectively, field-effect transistor [5], [6] input with filter [9] after drain electrode is joined joins, the output of filter obtains the intermediate frequency output signal, field effect transistor [5], [6] source ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98115816A CN1110123C (en) | 1998-07-10 | 1998-07-10 | Medium frequency output-less bridge balance mixer with monochip IC and microwave FET |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98115816A CN1110123C (en) | 1998-07-10 | 1998-07-10 | Medium frequency output-less bridge balance mixer with monochip IC and microwave FET |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1206244A CN1206244A (en) | 1999-01-27 |
| CN1110123C true CN1110123C (en) | 2003-05-28 |
Family
ID=5224771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98115816A Expired - Fee Related CN1110123C (en) | 1998-07-10 | 1998-07-10 | Medium frequency output-less bridge balance mixer with monochip IC and microwave FET |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1110123C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4035732A (en) * | 1974-10-03 | 1977-07-12 | The United States Of America As Represented By The Secretary Of The Army | High dynamic range receiver front end mixer requiring low local oscillator injection power |
| EP0273882A2 (en) * | 1986-12-31 | 1988-07-06 | STMicroelectronics S.r.l. | An integrating coupling circuit for coupling a modulator to a ceramic filter, useful with amplitude modulation receivers |
-
1998
- 1998-07-10 CN CN98115816A patent/CN1110123C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4035732A (en) * | 1974-10-03 | 1977-07-12 | The United States Of America As Represented By The Secretary Of The Army | High dynamic range receiver front end mixer requiring low local oscillator injection power |
| EP0273882A2 (en) * | 1986-12-31 | 1988-07-06 | STMicroelectronics S.r.l. | An integrating coupling circuit for coupling a modulator to a ceramic filter, useful with amplitude modulation receivers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1206244A (en) | 1999-01-27 |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |