CN104270098A - Microwave broadband down converter - Google Patents
Microwave broadband down converter Download PDFInfo
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- CN104270098A CN104270098A CN201410552773.0A CN201410552773A CN104270098A CN 104270098 A CN104270098 A CN 104270098A CN 201410552773 A CN201410552773 A CN 201410552773A CN 104270098 A CN104270098 A CN 104270098A
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Abstract
The invention discloses a microwave broadband down converter. The microwave broadband down converter comprises a radio-frequency signal processing module, an intermediate frequency signal processing module, a frequency mixing module and a gain switching module; the input of the radio-frequency signal processing module is connected with the radio-frequency signal output of a receiving antenna; the output of the radio-frequency signal processing module is connected with the radio-frequency input end of the frequency mixing module; the intermediate frequency output end of the frequency mixing module is connected with the input of the intermediate frequency signal processing module; the output of the intermediate frequency signal processing module is connected with the input of the gain switching module; the output end of the gain switching module outputs converted radio-frequency signals. The microwave broadband down converter can stably receive microwave signals ranging from 10 G to 15 G, intermediate frequency signals ranging from 1 G to 6 Hz are output after the signals are converted one time, system gains are set in a simple mode, and phase noise of a local oscillator is low; the down converter designed according to the design principle is small in size, light in weight, user-friendly in appearance, convenient to operate, low in power consumption, and free of other complex power supply modes as being provided with a lithium battery.
Description
Technical field
The present invention relates to a kind of frequency converter, particularly relate to a kind of microwave wideband band low-converter.
Background technology
Microwave mixer is the requisite front-end circuit functional block of any microwave receiving system.Faint microwave signal and local oscillated signal are added on non-linear element by it simultaneously, realize frequency by high frequency to low frequency or low frequency to the conversion of high frequency, export as intermediate-freuqncy signal, to carry out next step function treatment.
Microwave low-converter is a subsystem on ground satellite station receiver, and its effect is that microwave signal is transformed into intermediate-freuqncy signal, intermediate-freuqncy signal is supplied to rear end demodulated equipment.As a Core equipment of ground interception system, the performance of performance index to whole link such as dynamic range, sensitivity, noise factor, frequency stability of microwave low-converter plays deciding factor.
At present, microwave low-converter well can not reach equipment volume requirement little, lightweight, low in energy consumption, well can not reach the requirement of broadband, great dynamic range, high sensitivity and low phase noise in electrical property.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of microwave wideband band low-converter, exported as intermediate-freuqncy signal by single-conversion by microwave radio signal, and carry lithium battery, system gain arranges simply, easy to operate, low in energy consumption.
The object of the invention is to be achieved through the following technical solutions: a kind of microwave wideband band low-converter, it comprises radio-frequency signal processing module, IF signal processing module, frequency mixing module and gain switching module, the input of radio-frequency signal processing module exports with the radiofrequency signal of reception antenna and is connected, the output of radio-frequency signal processing module is connected with the rf inputs of frequency mixing module, the medium frequency output end of frequency mixing module is connected with the input of IF signal processing module, the output of IF signal processing module is connected with the input of gain switching module, radiofrequency signal after the output output frequency conversion of gain switching module.
Described radio-frequency signal processing module comprises band pass filter A, amplifier A and low pass filter A, the input of band pass filter A is connected with exterior antenna feeder line, the output of band pass filter A is connected with amplifier A, the output of amplifier A is connected with low pass filter A, the output of low pass filter A is connected with the rf inputs of frequency mixing module, band pass filter A is responsible for the image frequency of filtering feeder input signal, intermediate frequency and the outer interference signal of band, amplifier A is low noise amplifier, reduce system noise factor, increase signal receiving sensitivity, low pass filter A filtered signal harmonic wave.
Described IF signal processing module comprises low pass filter B and amplifier B, and the input of low pass filter B exports with the intermediate frequency of frequency mixing module and is connected, and the output of low pass filter B is connected with amplifier B, and the output of amplifier B is connected with gain switching module.
Described frequency mixing module comprises frequency mixer and local oscillator, the rf inputs of described frequency mixer is connected with the output of low pass filter A, the medium frequency output end of frequency mixer is connected with low pass filter B, and the local oscillation signal input of frequency mixer exports with local oscillator and is connected.
Described frequency mixing module also comprises band pass filter B and frequency multiplier, and the local oscillation signal input of frequency mixer is connected with the output of band pass filter B, and the input of band pass filter B is connected with the output of frequency multiplier, and the input of frequency multiplier exports with local oscillator and is connected.
Described gain switching module comprises either-or switch A, amplifier C, either-or switch B and low pass filter C, either-or switch A input is connected with the output of IF signal processing module, the one tunnel output of either-or switch A inputs with a road of either-or switch B and is connected, another road of either-or switch A is exported to be inputted with another road of either-or switch B by amplifier C and is connected, the output of either-or switch B is connected with the input of low pass filter C, the radiofrequency signal after the output output frequency conversion of low pass filter C.
It also comprises a storage battery, and storage battery is connected with radio-frequency signal processing module, IF signal processing module, frequency mixing module and gain switching module respectively, provides power supply.
The invention has the beneficial effects as follows: the microwave signal of reception 10G ~ 15G that the present invention can be stable, signal is by single-conversion, and export 1G ~ 6Hz intermediate-freuqncy signal, change system gain by simple mode, local oscillator noise is low; Little, lightweight according to the low-converter volume of design principle design of the present invention, profile is hommization very, easy to operate, low in energy consumption, carries lithium battery, makes low-converter without the need to other loaded down with trivial details supply power mode.
Accompanying drawing explanation
Fig. 1 is the system block diagram of low-converter of the present invention;
Fig. 2 is the schematic block circuit diagram of low-converter of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, a kind of microwave wideband band low-converter, it comprises radio-frequency signal processing module, IF signal processing module, frequency mixing module and gain switching module, the input of radio-frequency signal processing module exports with the radiofrequency signal of reception antenna and is connected, the output of radio-frequency signal processing module is connected with the rf inputs of frequency mixing module, the medium frequency output end of frequency mixing module is connected with the input of IF signal processing module, the output of IF signal processing module is connected with the input of gain switching module, the radiofrequency signal after the output output frequency conversion of gain switching module.
The input of radio-frequency signal processing module is connected with the signal input interface of microwave wideband band low-converter, and the signal input interface of microwave wideband band low-converter is connected with reception antenna, and the signal frequency that reception antenna receives is 10GHz ~ 15GHz.
As shown in Figure 2, described radio-frequency signal processing module comprises band pass filter A, amplifier A and low pass filter A, the input of band pass filter A is connected with exterior antenna feeder line, the output of band pass filter A is connected with amplifier A, the output of amplifier A is connected with low pass filter A, the output of low pass filter A is connected with the rf inputs of frequency mixing module, band pass filter A is responsible for the image frequency of filtering feeder input signal, intermediate frequency and the outer interference signal of band, amplifier A is low noise amplifier, reduce system noise factor, increase signal receiving sensitivity, low pass filter A filtered signal harmonic wave.
Described IF signal processing module comprises low pass filter B and amplifier B, and the input of low pass filter B exports with the intermediate frequency of frequency mixing module and is connected, and the output of low pass filter B is connected with amplifier B, and the output of amplifier B is connected with gain switching module.
Described frequency mixing module comprises frequency mixer and local oscillator, the rf inputs of described frequency mixer is connected with the output of low pass filter A, the medium frequency output end of frequency mixer is connected with low pass filter B, and the local oscillation signal input of frequency mixer exports with local oscillator and is connected.
Described frequency mixing module also comprises band pass filter B and frequency multiplier, and the local oscillation signal input of frequency mixer is connected with the output of band pass filter B, and the input of band pass filter B is connected with the output of frequency multiplier, and the input of frequency multiplier exports with local oscillator and is connected.
Described frequency multiplier is varactor doubler, and the local oscillation signal frequency that described local oscillator is launched is 8GHz.
The local oscillation signal of 8GHz is after varactor doubler, and local oscillation signal becomes the local oscillation signal of 16GHz.
Described gain switching module comprises either-or switch A, amplifier C, either-or switch B and low pass filter C, either-or switch A input is connected with the output of IF signal processing module, the one tunnel output of either-or switch A inputs with a road of either-or switch B and is connected, another road of either-or switch A is exported to be inputted with another road of either-or switch B by amplifier C and is connected, the output of either-or switch B is connected with the input of low pass filter C, the radiofrequency signal after the output output frequency conversion of low pass filter C.
Two either-or switch switches, system gain is switched between different yield values, as as requested, ensure that when designing and debug system gain switches between 0dB and 10dB, when either-or switch A is communicated with either-or switch B by amplifier C, make system gain be 10dB, when either-or switch A is directly connected with either-or switch B, system gain is 0dB.
The reception input signal of 10GHz ~ 15GHz and the local oscillation signal of 16GHz, after frequency mixer, export the output signal of 1GHz ~ 6GHz.
10G ~ 15G the signal received is input to radio-frequency signal processing module by reception antenna, the band pass filter A filtering image frequency of radio-frequency signal processing module and intermediate frequency and outer other of band cause the signal of interference to system, signal amplifies through low noise amplifier A after band pass filter A, the Main Function of amplifier reduces system noise factor, increase system sensitivity, signal inputs low pass filter A after amplifier A, filtering input signal harmonic wave.
Signal accesses frequency mixing module after radio-frequency signal processing module, 10GHz ~ 15GHz input signal is by rf input interface input mixer, the local oscillation signal of 8GHz is after varactor doubler, export 16GHz local oscillation signal, 16GHz local oscillation signal is after band pass filter B filter out-band is disturbed outward, by local oscillation signal input interface input mixer, frequency mixer outputs signal obtaining 1GHz ~ 6GHz after 10GHz ~ 15GHz input signal and the mixing of 16GHz local oscillation signal.
Signal is accessed IF signal processing module by frequency mixing module, outputs signal through low pass filter B, reduces the spuious and high order harmonic component signal that frequency mixer exports, and is amplifying output signal through amplifier B.
IF signal processing module is by signal insertion gain handover module, by either-or switch A and either-or switch B, system gain is switched between 0dB and 10dB, signal by low pass filter C, filtered signal is humorous involve far-end spuious after, export 1GHz ~ 6GHz signal
It also comprises a storage battery, and storage battery is connected with radio-frequency signal processing module, IF signal processing module, frequency mixing module and gain switching module respectively, provides power supply.
Storage battery is 12V lithium battery, carries lithium battery, makes low-converter without the need to other loaded down with trivial details supply power mode.
The present invention can be stable the microwave signal of reception 10G ~ 15G, signal, by single-conversion, exports 1G ~ 6Hz intermediate-freuqncy signal; Low-converter gain switches by simple mode, as arranged between 0dB and 10dB; Local oscillator noise is low, and as according to the actual test of frequency spectrum instrument, the local oscillator noise of receiver can arrive-90dBc/Hz 10KHz.
The low-converter volume adopting design principle of the present invention to design is little, lightweight, and the hommization of profile is easy to operate, low in energy consumption, carries lithium battery, makes low-converter without the need to other loaded down with trivial details supply power mode.
Claims (7)
1. a microwave wideband band low-converter, it is characterized in that: it comprises radio-frequency signal processing module, IF signal processing module, frequency mixing module and gain switching module, the input of radio-frequency signal processing module exports with the radiofrequency signal of reception antenna and is connected, the output of radio-frequency signal processing module is connected with the rf inputs of frequency mixing module, the medium frequency output end of frequency mixing module is connected with the input of IF signal processing module, the output of IF signal processing module is connected with the input of gain switching module, the radiofrequency signal after the output output frequency conversion of gain switching module.
2. a kind of microwave wideband band low-converter according to claim 1, it is characterized in that: described radio-frequency signal processing module comprises band pass filter A, amplifier A and low pass filter A, the input of band pass filter A is connected with exterior antenna feeder line, the output of band pass filter A is connected with amplifier A, the output of amplifier A is connected with low pass filter A, the output of low pass filter A is connected with the rf inputs of frequency mixing module, band pass filter A is responsible for the image frequency of filtering feeder input signal, intermediate frequency and the outer interference signal of band, amplifier A is low noise amplifier, reduce system noise factor, increase signal receiving sensitivity, low pass filter A filtered signal harmonic wave.
3. a kind of microwave wideband band low-converter according to claim 1, it is characterized in that: described IF signal processing module comprises low pass filter B and amplifier B, the input of low pass filter B exports with the intermediate frequency of frequency mixing module and is connected, the output of low pass filter B is connected with amplifier B, and the output of amplifier B is connected with gain switching module.
4. a kind of microwave wideband band low-converter according to claim 1, it is characterized in that: described frequency mixing module comprises frequency mixer and local oscillator, the rf inputs of described frequency mixer is connected with the output of low pass filter A, the medium frequency output end of frequency mixer is connected with low pass filter B, and the local oscillation signal input of frequency mixer exports with local oscillator and is connected.
5. a kind of microwave wideband band low-converter according to claim 4, it is characterized in that: described frequency mixing module also comprises band pass filter B and frequency multiplier, the local oscillation signal input of frequency mixer is connected with the output of band pass filter B, the input of band pass filter B is connected with the output of frequency multiplier, and the input of frequency multiplier exports with local oscillator and is connected.
6. a kind of microwave wideband band low-converter according to claim 1, it is characterized in that: described gain switching module comprises either-or switch A, amplifier C, either-or switch B and low pass filter C, either-or switch A input is connected with the output of IF signal processing module, the one tunnel output of either-or switch A inputs with a road of either-or switch B and is connected, another road of either-or switch A is exported to be inputted with another road of either-or switch B by amplifier C and is connected, the output of either-or switch B is connected with the input of low pass filter C, radiofrequency signal after the output output frequency conversion of low pass filter C.
7. a kind of microwave wideband band low-converter according to claim 1, it is characterized in that: it also comprises a storage battery, storage battery is connected with radio-frequency signal processing module, IF signal processing module, frequency mixing module and gain switching module respectively, provides power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552773.0A CN104270098A (en) | 2014-10-17 | 2014-10-17 | Microwave broadband down converter |
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| CN201410552773.0A CN104270098A (en) | 2014-10-17 | 2014-10-17 | Microwave broadband down converter |
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| CN104270098A true CN104270098A (en) | 2015-01-07 |
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| CN201410552773.0A Pending CN104270098A (en) | 2014-10-17 | 2014-10-17 | Microwave broadband down converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107251505A (en) * | 2015-03-20 | 2017-10-13 | 华为技术有限公司 | Single local oscillator framework for dual-band microwave/millimeter-wave transceiver |
| CN107483065A (en) * | 2017-08-15 | 2017-12-15 | 东南大学 | The clamped beam microwave receiver front end that internet of things oriented release model is collected |
| CN107565986A (en) * | 2017-08-15 | 2018-01-09 | 东南大学 | The cantilever beam microwave receiver front end that internet of things oriented release model is collected |
| CN109150218A (en) * | 2018-10-12 | 2019-01-04 | 南京屹信航天科技有限公司 | A kind of miniaturization ODU receiving channel module |
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| CN201758388U (en) * | 2010-08-25 | 2011-03-09 | 天津七六四通信导航技术有限公司 | LOC/GS/VOR/MB four-beacon shared outfield tester receiver |
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Radio transceiver |
| CN204089733U (en) * | 2014-10-17 | 2015-01-07 | 成都九华圆通科技发展有限公司 | A kind of microwave wideband band low-converter |
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2014
- 2014-10-17 CN CN201410552773.0A patent/CN104270098A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201758388U (en) * | 2010-08-25 | 2011-03-09 | 天津七六四通信导航技术有限公司 | LOC/GS/VOR/MB four-beacon shared outfield tester receiver |
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Radio transceiver |
| CN204089733U (en) * | 2014-10-17 | 2015-01-07 | 成都九华圆通科技发展有限公司 | A kind of microwave wideband band low-converter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107251505A (en) * | 2015-03-20 | 2017-10-13 | 华为技术有限公司 | Single local oscillator framework for dual-band microwave/millimeter-wave transceiver |
| CN107251505B (en) * | 2015-03-20 | 2020-01-10 | 华为技术有限公司 | Dual-band microwave/millimeter wave transceiver |
| CN107483065A (en) * | 2017-08-15 | 2017-12-15 | 东南大学 | The clamped beam microwave receiver front end that internet of things oriented release model is collected |
| CN107565986A (en) * | 2017-08-15 | 2018-01-09 | 东南大学 | The cantilever beam microwave receiver front end that internet of things oriented release model is collected |
| CN109150218A (en) * | 2018-10-12 | 2019-01-04 | 南京屹信航天科技有限公司 | A kind of miniaturization ODU receiving channel module |
| CN109150218B (en) * | 2018-10-12 | 2024-02-23 | 南京屹信航天科技有限公司 | Miniaturized ODU receiving channel module |
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