CN202565256U - 30-to-3000-megahertz ultra-short wave receiving machine - Google Patents
30-to-3000-megahertz ultra-short wave receiving machine Download PDFInfo
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- CN202565256U CN202565256U CN2012202312644U CN201220231264U CN202565256U CN 202565256 U CN202565256 U CN 202565256U CN 2012202312644 U CN2012202312644 U CN 2012202312644U CN 201220231264 U CN201220231264 U CN 201220231264U CN 202565256 U CN202565256 U CN 202565256U
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Abstract
The utility model discloses a 30-to-3000-megahertz ultra-short wave receiving machine comprising a channel unit, a first local oscillation unit, a second local oscillation unit and a third local oscillation unit. The local oscillation signal output of the first local oscillation unit is connected with the input of a first middle mixing frequency device. The local oscillation signal output of the second local oscillation unit is connected with the input of a second middle mixing frequency device. The local oscillation signal output of the third local oscillation unit is connected with the input of a third mixing frequency device. The 30-to-3000-megahertz ultra-short wave receiving machine can stably receive ultra-short wave signals from 30 megahertz to 3000 megahertz and output on a middle frequency of 70 megahertz. Amplitudes of the middle frequency can be stably output within the required range. On the condition that five receiving machines work simultaneously, the largest frequency covering range can reach 100 megahertz and automatic correction can be carried out in an ultra-short wave frequency band. The 30-to-3000-megahertz ultra-short wave receiving machine has the advantages of being strong in signal detecting capacity, low in bit error ratio, less in signal distortion situation, high in signal-to-noise ratio, good in straying-controlling effect, strong in capacity of resisting disturbance, good in ultra-short wave communication effect, simple in structure, and low in cost and the like.
Description
Technical field
The utility model relates to a kind of 30～3000MHz ultra-short wave receiver.
Background technology
Ultrashort wavelength is claimed metric wave again between 1～10 meter, it is better than shortwave that it propagates stability, receives the influence of season and variation round the clock little; Frequency is higher, and the frequency band broad can be used for multichannel communication; Modulation system adopts frequency modulation system usually, and signal to noise ratio is higher, and communication quality is better than shortwave; At present, the ultra short wave communication technology is widely used in transmitting business fields such as TV, FM broadcasting, radar, navigation and mobile communication.The ultra short wave communication system is made up of terminal station and relay station; The terminal station is provided with transmitter, receiver, carrier terminal and antenna; Relay station is provided with the transmitter and receiver and the respective antenna of sensible both direction, and receiver is the important component part of ultra short wave communication system.
Modern general purpose receiver more and more tends to the direction of high-performance, high integration in design process; On performance, require high linearity, great dynamic range, high sensitivity and the high-resolution of receiver; The linearity and antijamming capability that this just requires to improve as much as possible receiver reduce its distorted signals and the error rate.
Yet the existing ultra-short wave receiver ubiquity linearity is low, dynamic range is not enough, the input ability; The error rate is high, the distorted signals situation is serious, and antijamming capability is relatively poor, phase noise height, spuious inhibition weak effect, ultra short wave communication weak effect; Complex structure, problems such as cost height.
The utility model content
The purpose of the utility model is to solve the deficiency of prior art, and low cost 30～3000MHz ultra-short wave receiver that a kind of signal to noise ratio is high, spuious inhibition is effective, antijamming capability is strong is provided.
The purpose of the utility model realizes through following technical scheme: 30～3000MHz ultra-short wave receiver; Comprise casing and internal machine core circuit; Described movement circuit is made up of Channel Elements, the first local oscillator unit, the second local oscillator unit and the 3rd local oscillator unit; Channel Elements comprises the amplitude limiter that is used to limit the input signal wave amplitude that connects in order; Be used to adjust the dynamic adjusting module of radio frequency of input signal amplitude, be used for signal subsection and the preselector that suppresses image frequency signal are used for the low noise amplifier of amplifying signal amplitude; The low pass filter LPF1 that is used for the filtering image frequency signal; Be used for the frequency mixer that mixing produces first intermediate-freuqncy signal, be used for a median filter and an amplifier of the first intermediate-freuqncy signal filtering, amplification, be used for two frequency mixers that mixing produces second intermediate-freuqncy signal; Be used for the second intermediate-freuqncy signal filtering, amplification and amplitude and adjust attenuator in two median filters of decay, two amplifiers and two; Be used for three frequency mixers that mixing produces the 3rd intermediate-freuqncy signal, be used for three median filters and three attenuators of the 3rd intermediate-freuqncy signal filtering, decay, be used for the power amplifier and the low pass filter LPF2 that is used for the filtering high-frequency signal of amplifying signal power; The local oscillation signal output of the first local oscillator unit is connected with the input of frequency mixer in, and the local oscillation signal output of the second local oscillator unit links to each other with the input of frequency mixer in two, and the local oscillation signal output of the 3rd local oscillator unit connects the input of frequency mixer in three.
The utility model also comprises at least one self-correcting unit; The self-correcting unit comprises that one tunnel output of amplifier LNA21, low pass filter LPF21 and 21, one minutes six power splitters 21 of one minute six power splitter is connected with the input of numerical-control attenuator with the phase-locked loop chip of band VCO through amplifier LNA22 successively; Five tunnel outputs are connected with low pass filter LPF22 respectively in addition.
The dynamic adjusting module of the described radio frequency of the utility model is made up of attenuator and amplifier, and attenuator selects two K switch 41 to link to each other with the output of amplitude limiter through one respectively with amplifier.
The described first local oscillator unit of the utility model is made up of amplifier LNA41, main phase-locked loop, auxilliary phase-locked loop, frequency mixer 41, amplifier LNA42 and power splitter 41; Described main phase-locked loop comprises phase discriminator PD41, active low-pass filter LPF41 and the voltage controlled oscillator VCO 41 that connects in order, and auxilliary phase-locked loop comprises phase discriminator PD42, low pass filter LPF42 and the voltage controlled oscillator VCO 42 that connects in order; The input of amplifier LNA41 connects standard signal source; The output of one of which road links to each other with the input of the phase discriminator PD41 of main phase-locked loop through low pass filter LPF43; One tunnel output of the voltage controlled oscillator VCO 41 of main phase-locked loop is connected with the input of power splitter 41 through amplifier LNA42, and another road output of voltage controlled oscillator VCO 41 links to each other with the L end of frequency mixer 41 through at least one amplifier LNA43; Another road output of amplifier LNA41 links to each other with the input of the phase discriminator PD42 of auxilliary phase-locked loop through low pass filter LPF44; One tunnel output of the voltage controlled oscillator VCO 42 of auxilliary phase-locked loop links to each other with the I end of frequency mixer through amplifier LNA44, and another road output of voltage controlled oscillator VCO 42 connects phase discriminator PD42 through high pass filter HPF41; The R end of frequency mixer selects the input of two K switch 41 to be connected with one; One selects two outputs of two K switch 41 to be connected with the input of low pass filter LPF45 and low pass filter LPF46 respectively; The output of low pass filter LPF45 and low pass filter LPF46 selects two inputs of two K switch 42 to link to each other with one respectively, and one selects the output of two K switch 42 to link to each other with the input of phase discriminator PD41 through amplifier LNA45.
The described second local oscillator unit of the utility model is made up of low pass filter LPF51, phase-locked loop, amplifier LNA51, low pass filter LPF52 and power splitter 51, and phase-locked loop comprises phase discriminator PD51, low pass filter LPF53 and the voltage controlled oscillator VCO 51 that connects in order; The input of low pass filter LPF51 connects standard signal source; Its output links to each other with the signal source input of phase discriminator PD51; The voltage output of phase discriminator PD51 is connected with the control voltage input terminal of voltage controlled oscillator VCO 51 through low pass filter LPF53; One tunnel output of voltage controlled oscillator VCO 51 is connected with the input of power splitter 51 with low pass filter LPF52 through amplifier LNA51 successively; Another road output of voltage controlled oscillator VCO 51 is connected with the input of high pass filter HPF51, and the output of high pass filter HPF51 links to each other with the local oscillation signal input of phase discriminator PD51.
Described the 3rd local oscillator unit of the utility model is made up of band pass filter BPF61, frequency synthesizer DDS, band pass filter BPF62, amplifier LNA61, phase discriminator PD61, passive low ventilating filter LPF61, voltage controlled oscillator VCO 61, amplifier LNA62 and one minute five power splitter 61 of connecting in order; It also comprises high pass filter HPF61; The input of high pass filter HPF61 is connected with voltage controlled oscillator VCO 61, and its output links to each other with the local oscillation signal input of phase discriminator PD61.
The beneficial effect of the utility model is: the utility model can be stablized the ultrashort wave signal that receives 30～3000MHz; Signal is exported on the intermediate frequency of 70MHz through repeatedly frequency conversion, and the amplitude of intermediate frequency can be stablized output in the scope that requires; Under the situation that five receivers are worked simultaneously; The peak frequency coverage can reach 100MHz, and the local oscillator of receiver can reach 110dBc/Hz10KHz, can carry out self calibration in the ultrashort wave frequency range; This ultra-short wave receiver has linearity height, dynamic range broad, and the input ability is strong, and the error rate is low, the distorted signals situation is less; Signal to noise ratio is high, spuious inhibition is effective, antijamming capability is strong; Characteristics such as ultra short wave communication is effective, and is simple in structure, and cost is low.
Description of drawings
Fig. 1 is the utility model Channel Elements schematic block circuit diagram;
Fig. 2 is the utility model self-correcting element circuit theory diagram;
Fig. 3 is the utility model first local oscillator element circuit theory diagram;
Fig. 4 is the utility model second local oscillator element circuit theory diagram;
Fig. 5 is the utility model the 3rd local oscillator element circuit theory diagram.
Embodiment
Further describe the technical scheme of the utility model below in conjunction with accompanying drawing: 30～3000MHz ultra-short wave receiver; Comprise casing and internal machine core circuit; As shown in Figure 1; Movement circuit is made up of Channel Elements, the first local oscillator unit, the second local oscillator unit and the 3rd local oscillator unit, and Channel Elements comprises the amplitude limiter that is used to limit the input signal wave amplitude that connects in order, is used to adjust the dynamic adjusting module of radio frequency of input signal amplitude; Be used for signal subsection and the preselector that suppresses image frequency signal; The low noise amplifier that is used for the amplifying signal amplitude is used for the low pass filter LPF1 of filtering image frequency signal, is used for the frequency mixer that mixing produces first intermediate-freuqncy signal; The median filter and the amplifier that are used for the first intermediate-freuqncy signal filtering, amplification; Be used for two frequency mixers that mixing produces second intermediate-freuqncy signal, be used for the second intermediate-freuqncy signal filtering, amplification and amplitude and adjust attenuator in two median filters of decay, two amplifiers and two, be used for three frequency mixers that mixing produces the 3rd intermediate-freuqncy signal; Three median filters and three attenuators that are used for the 3rd intermediate-freuqncy signal filtering, decay, power amplifier that is used for amplifying signal power and the low pass filter LPF2 that is used for the filtering high-frequency signal; Wherein, the dynamic adjusting module of radio frequency is made up of attenuator and amplifier, and attenuator selects two K switch 41 to link to each other with the output of amplitude limiter through one respectively with amplifier.The local oscillation signal output of the first local oscillator unit is connected with the input of frequency mixer in, and the local oscillation signal output of the second local oscillator unit links to each other with the input of frequency mixer in two, and the local oscillation signal output of the 3rd local oscillator unit connects the input of frequency mixer in three.
As shown in Figure 2; Ultra-short wave receiver also comprises at least one self-correcting unit; The self-correcting unit comprises that one tunnel output of amplifier LNA21 (ERA-5SM chip), low pass filter LPF21 and 21, one minutes six power splitters 21 of one minute six power splitter is connected with the input of numerical-control attenuator PE4309 with the phase-locked loop chip HMC830 of band VCO through amplifier LNA22 (ERA-3SM chip) successively; Five tunnel outputs are connected with low pass filter LPF22 respectively in addition.
The phase noise of self-correcting unit and spuious analysis: the phase noise of crystal oscillator plays direct effect to the system phase noise, according to 1 phase noise analysis, make an uproar at the bottom of the phase discriminator of HMC704 during the 100M phase demodulation=-233+10log
Fpd=-233+10Log
100000000=-153dBc/Hz10k during locking 5.3G, makes an uproar at the bottom of desired phase noise=phase discriminator+3+20log
Fout/fpd=-153+3+20Log
53=-115.5dBc/Hz10k, the VT of VCO need reach 14V during because of output 7G, so loop filtering adopts active filter; Phase noise can worsen about 3dB; So phase noise when main ring locking 5.3G≤-113dBc/Hz10k, therefore if will export 6985 o'clock phase noises reaches≤-110dBc/Hz10k, the crystal oscillator phase noise at least should＜-150dBc/Hz10k; Spuious through actual measurement HMC830 the poorest spuious place is-46dBc to meet the demands.
The output amplitude of self-correcting unit: self-correcting source section H MC830 power output >=0dBm, after connect a fixed attenuator, power output is-10dBm when making PE4309 unattenuated; During PE4309 decay 10dB; Output-20dBm, during PE4309 decay 20dB, output-30dBm; During PE4309 decay 30dB, output-40dBm.The reference source part: crystal oscillator power output after amplifying can reach 17dBm, and loss＜11dB that back filter, power splitter, filter are added up, so satisfy >=5dBm.
As shown in Figure 3; The first local oscillator unit is made up of amplifier LNA41, main phase-locked loop, auxilliary phase-locked loop, frequency mixer 41, amplifier LNA42 and power splitter 41; Described main phase-locked loop comprises phase discriminator PD41, active low-pass filter LPF41 and the voltage controlled oscillator VCO 41 that connects in order, and auxilliary phase-locked loop comprises phase discriminator PD42, low pass filter LPF42 and the voltage controlled oscillator VCO 42 that connects in order; The input of amplifier LNA41 connects standard signal source; The output of one of which road links to each other with the input of the phase discriminator PD41 of main phase-locked loop through low pass filter LPF43; One tunnel output of the voltage controlled oscillator VCO 41 of main phase-locked loop is connected with the input of power splitter 41 through amplifier LNA42, and another road output of voltage controlled oscillator VCO 41 links to each other with the L end of frequency mixer 41 through at least one amplifier LNA43; Another road output of amplifier LNA41 links to each other with the input of the phase discriminator PD42 of auxilliary phase-locked loop through low pass filter LPF44; One tunnel output of the voltage controlled oscillator VCO 42 of auxilliary phase-locked loop links to each other with the I end of frequency mixer through amplifier LNA44, and another road output of voltage controlled oscillator VCO 42 connects phase discriminator PD42 through high pass filter HPF41; The R end of frequency mixer selects the input of two K switch 41 to be connected with one; One selects two outputs of two K switch 41 to be connected with the input of low pass filter LPF45 and low pass filter LPF46 respectively; The output of low pass filter LPF45 and low pass filter LPF46 selects two inputs of two K switch 42 to link to each other with one respectively, and one selects the output of two K switch 42 to link to each other with the input of phase discriminator PD41 through amplifier LNA45.
The phase noise analysis of the first local oscillator unit
:As far as main ring, use high performance chips HMC704, phase demodulation frequency is 100M; 0.5M about loop can play good inhibition to the integer sideband that phase discriminator brings is spuious,＞75dBc, and suppress the noise of VCO near-end; During phase demodulation frequency 100M, make an uproar at the bottom of the phase discriminator=-233+10log
Fpd=-233+10Log
100000000=-153dBc/Hz10k; The-233rd, the optimum condition that can not satisfy it on the optimal situation practice can worsen; Deterioration amount is estimated by 3dB; If the phase noise of 100M external reference signal be superior to the end make an uproar≤-150dBc/Hz10k, during locking 5.3G, make an uproar at the bottom of desired phase noise=phase discriminator+3+20log
Fout/fpd=-153+3+20Log
53=-115.5dBc/Hz10k, the VT of VCO need reach 14V during because of output 7G, so loop filtering adopts active filter; Phase noise can worsen about 3dB, thus when main ring locking 5.3G phase noise≤-113dBc/Hz10k, secondary ring output frequency 1.6G-1.7G bandwidth is 100M; As far as secondary ring; Adopt HMC704 integral frequency divisioil pattern phase demodulation, phase demodulation frequency is 5M, make an uproar at the bottom of the HMC704=-233+10log
Fpd=-233+10log
5000000=-166dB c/Hz10k, during output 1.7G, make an uproar+20log in phase noise=end
Fout/fpd=-166+20log
340=-115 dBc/Hz10k, VCO uses the UMV-1650-R16 of UMC company, and its typical phase noise is-108dBc/Hz10kHz; Loop bandwidth about 100k to noiseproof feature and spuious be suitable, so when finally exporting at 6985M, main ring lock 5300M; Secondary ring output 1685M; Because the phase noise of frequency mixer is got poor one, thus the phase noise during 6985M≤-be feasible in theory during 113dBc/Hz10k
The spuious analysis of the first local oscillator unit: be mainly derived to frequency source is spuious: the harmonic radiation of crystal oscillator, the leakage of phase demodulation frequency reaches spuious that the integer sideband comes; Clock is crosstalked spuious, so take following measure to guarantee spuious index to above source, reference frequency is carried out filtering; Reduce harmonic radiation; Loop filter gets that moderate bandwidth is taken into account inhibition that the VCO near-end is made an uproar mutually and to spuious inhibition of fractional frequency division and the requirement of frequency hopping time, crucial active device such as phase discriminator, and VCO supplies power with independent noiseproof feature and the good LDO of PSRR; Carry out filtering on each active device power supply, reduce crosstalking of ripple and signal.Adopt the resistance coupling on the feedback loop, and add an amplifier reverse isolation, the signal that reduces to produce in the phase discriminator is through the modulation of feedback loop to VCO.When the PCB layout, carry out isolation, reduce the space radiation of signal.Accomplish spuious≤-70dBc.
As shown in Figure 4, the second local oscillator unit is made up of low pass filter LPF51, phase-locked loop, amplifier LNA51, low pass filter LPF52 and power splitter 51, and phase-locked loop comprises phase discriminator PD51, low pass filter LPF53 and the voltage controlled oscillator VCO 51 that connects in order; The input of low pass filter LPF51 connects standard signal source; Its output links to each other with the signal source input of phase discriminator PD51; The voltage output of phase discriminator PD51 is connected with the control voltage input terminal of voltage controlled oscillator VCO 51 through low pass filter LPF53; One tunnel output of voltage controlled oscillator VCO 51 is connected with the input of power splitter 51 with low pass filter LPF52 through amplifier LNA51 successively; Another road output of voltage controlled oscillator VCO 51 is connected with the input of high pass filter HPF51, and the output of high pass filter HPF51 links to each other with the local oscillation signal input of phase discriminator PD51.
The phase noise of the second local oscillator unit and spuious analysis: HMC704 adopt integral mode, and during the 10M phase demodulation, the end makes an uproar=-233+10Log
Fpd=-233+70=-163 dBc/Hz10kHz, practice is calculated by worsening 3dB.If the reference source phase noise is better than chip, then upper noise limit is determined by chip, and during output 3550M, the frequency multiplication number of times is 355 times, thus export 3550 o'clock phase noises=-160+20log
n=-160+20log
355 =-109 dBc/Hz10kHz, because of adopting the 10M phase demodulation, the spuious point of the integer braid of PLL appears at from the far place of loop bandwidth, so can filter very clean, spuious can easily accomplishing≤-75dBc.
As shown in Figure 5; The 3rd local oscillator unit is made up of band pass filter BPF61, frequency synthesizer DDS, band pass filter BPF62, amplifier LNA61, phase discriminator PD61, passive low ventilating filter LPF61, voltage controlled oscillator VCO 61, amplifier LNA62 and one minute five power splitter 61 of connecting in order; It also comprises high pass filter HPF61; The input of high pass filter HPF61 is connected with voltage controlled oscillator VCO 61, and its output links to each other with the local oscillation signal input of phase discriminator PD61.
The phase noise of the 3rd local oscillator unit and spuious analysis: if the reference source phase noise is better, phase noise can reach-140dBc/Hz1kHz during AD9910 output 80M, after phase-locked loop 5 frequencys multiplication, worsens 20Log
5=14, so in theory when 375M, phase noise=-126dBc/Hz1kHz; Far above our requirement, spuious aspect is owing to consider that the spuious point of DDS output all drops on outside the filter band when selecting frequency; (26～50M), it is very clean that this available band pass filter is filtered, according to the AD9910 handbook from exporting 6 times of point=6* (71～75)-1*400=that mix out with reference signal that the nearest point of band pass filter is an output frequency; Near-end is spuious during output 71M～75M is-87dBc; After 5 frequencys multiplication worsened 14dB, the poorest also had-73dBc, meets the demands; And the spuious phase demodulation frequency place that appears at of integer braid that produces present phase demodulation frequency place by phase-locked loop is especially away from loop bandwidth, but filtering is quite clean.
The output amplitude of the 3rd local oscillator unit: VCO output amplitude representative value is+6dBm, and after work of resistance divides, being input to booster output is 0dBm, and amplifier output can reach 12dBm; Loss 8dB after 1 minute 5 merit is divided; The power that is input to final amplifier is 4dBm, and the final amplifier gain is 20dB, P_1=17dBm; Filter Insertion Loss＜1.5dB, visible every road power output meets the demands.
Claims (6)
1.30～3000MHz ultra-short wave receiver comprises casing and internal machine core circuit, it is characterized in that: described movement circuit is made up of Channel Elements, the first local oscillator unit, the second local oscillator unit and the 3rd local oscillator unit,
Channel Elements comprises the amplitude limiter that is used to limit the input signal wave amplitude that connects in order; Be used to adjust the dynamic adjusting module of radio frequency of input signal amplitude; Be used for signal subsection and the preselector that suppresses image frequency signal; The low noise amplifier that is used for the amplifying signal amplitude is used for the low pass filter LPF1 of filtering image frequency signal, is used for the frequency mixer that mixing produces first intermediate-freuqncy signal; The median filter and the amplifier that are used for the first intermediate-freuqncy signal filtering, amplification; Be used for two frequency mixers that mixing produces second intermediate-freuqncy signal, be used for the second intermediate-freuqncy signal filtering, amplification and amplitude and adjust attenuator in two median filters of decay, two amplifiers and two, be used for three frequency mixers that mixing produces the 3rd intermediate-freuqncy signal; Three median filters and three attenuators that are used for the 3rd intermediate-freuqncy signal filtering, decay, power amplifier that is used for amplifying signal power and the low pass filter LPF2 that is used for the filtering high-frequency signal;
The local oscillation signal output of the first local oscillator unit is connected with the input of frequency mixer in, and the local oscillation signal output of the second local oscillator unit links to each other with the input of frequency mixer in two, and the local oscillation signal output of the 3rd local oscillator unit connects the input of frequency mixer in three.
2. 30～3000MHz ultra-short wave receiver according to claim 1; It is characterized in that: it also comprises at least one self-correcting unit; The self-correcting unit comprises that one tunnel output of amplifier LNA21, low pass filter LPF21 and 21, one minutes six power splitters 21 of one minute six power splitter is connected with the input of numerical-control attenuator with the phase-locked loop chip of band VCO through amplifier LNA22 successively; Five tunnel outputs are connected with low pass filter LPF22 respectively in addition.
3. 30～3000MHz ultra-short wave receiver according to claim 1 is characterized in that: the dynamic adjusting module of described radio frequency is made up of attenuator and amplifier, and attenuator selects two K switch 41 to link to each other with the output of amplitude limiter through one respectively with amplifier.
4. 30～3000MHz ultra-short wave receiver according to claim 1; It is characterized in that: the described first local oscillator unit is made up of amplifier LNA41, main phase-locked loop, auxilliary phase-locked loop, frequency mixer 41, amplifier LNA42 and power splitter 41; Described main phase-locked loop comprises phase discriminator PD41, active low-pass filter LPF41 and the voltage controlled oscillator VCO 41 that connects in order, and auxilliary phase-locked loop comprises phase discriminator PD42, low pass filter LPF42 and the voltage controlled oscillator VCO 42 that connects in order; The input of amplifier LNA41 connects standard signal source; The output of one of which road links to each other with the input of the phase discriminator PD41 of main phase-locked loop through low pass filter LPF43; One tunnel output of the voltage controlled oscillator VCO 41 of main phase-locked loop is connected with the input of power splitter 41 through amplifier LNA42, and another road output of voltage controlled oscillator VCO 41 links to each other with the L end of frequency mixer 41 through at least one amplifier LNA43; Another road output of amplifier LNA41 links to each other with the input of the phase discriminator PD42 of auxilliary phase-locked loop through low pass filter LPF44; One tunnel output of the voltage controlled oscillator VCO 42 of auxilliary phase-locked loop links to each other with the I end of frequency mixer through amplifier LNA44, and another road output of voltage controlled oscillator VCO 42 connects phase discriminator PD42 through high pass filter HPF41; The R end of frequency mixer selects the input of two K switch 41 to be connected with one; One selects two outputs of two K switch 41 to be connected with the input of low pass filter LPF45 and low pass filter LPF46 respectively; The output of low pass filter LPF45 and low pass filter LPF46 selects two inputs of two K switch 42 to link to each other with one respectively, and one selects the output of two K switch 42 to link to each other with the input of phase discriminator PD41 through amplifier LNA45.
5. 30～3000MHz ultra-short wave receiver according to claim 1; It is characterized in that: the described second local oscillator unit is made up of low pass filter LPF51, phase-locked loop, amplifier LNA51, low pass filter LPF52 and power splitter 51, and phase-locked loop comprises phase discriminator PD51, low pass filter LPF53 and the voltage controlled oscillator VCO 51 that connects in order; The input of low pass filter LPF51 connects standard signal source; Its output links to each other with the signal source input of phase discriminator PD51; The voltage output of phase discriminator PD51 is connected with the control voltage input terminal of voltage controlled oscillator VCO 51 through low pass filter LPF53; One tunnel output of voltage controlled oscillator VCO 51 is connected with the input of power splitter 51 with low pass filter LPF52 through amplifier LNA51 successively; Another road output of voltage controlled oscillator VCO 51 is connected with the input of high pass filter HPF51, and the output of high pass filter HPF51 links to each other with the local oscillation signal input of phase discriminator PD51.
6. 30～3000MHz ultra-short wave receiver according to claim 1; It is characterized in that: described the 3rd local oscillator unit is made up of band pass filter BPF61, frequency synthesizer DDS, band pass filter BPF62, amplifier LNA61, phase discriminator PD61, passive low ventilating filter LPF61, voltage controlled oscillator VCO 61, amplifier LNA62 and one minute five power splitter 61 of connecting in order; It also comprises high pass filter HPF61; The input of high pass filter HPF61 is connected with voltage controlled oscillator VCO 61, and its output links to each other with the local oscillation signal input of phase discriminator PD61.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684716A (en) * | 2012-05-22 | 2012-09-19 | 成都九华圆通科技发展有限公司 | 30-3000 MHz ultrashort wave receiver |
| CN105680961A (en) * | 2016-01-14 | 2016-06-15 | 中兵通信科技有限公司 | Received signal processing circuit of ultra-short wave radio set |
| CN108445483A (en) * | 2018-03-16 | 2018-08-24 | 成都锦江电子系统工程有限公司 | Water floats plant radar sensing system |
| CN109245763A (en) * | 2018-08-21 | 2019-01-18 | 成都天奥电子股份有限公司 | A kind of nearly carrier frequency Frequency Synthesizer with Low Phase Noise |
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2012
- 2012-05-22 CN CN2012202312644U patent/CN202565256U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684716A (en) * | 2012-05-22 | 2012-09-19 | 成都九华圆通科技发展有限公司 | 30-3000 MHz ultrashort wave receiver |
| CN105680961A (en) * | 2016-01-14 | 2016-06-15 | 中兵通信科技有限公司 | Received signal processing circuit of ultra-short wave radio set |
| CN105680961B (en) * | 2016-01-14 | 2018-01-23 | 中兵通信科技股份有限公司 | A kind of ultrashort wave radio set reception signal process circuit |
| CN108445483A (en) * | 2018-03-16 | 2018-08-24 | 成都锦江电子系统工程有限公司 | Water floats plant radar sensing system |
| CN108445483B (en) * | 2018-03-16 | 2021-08-17 | 成都锦江电子系统工程有限公司 | Radar detection system for water-floating plants |
| CN109245763A (en) * | 2018-08-21 | 2019-01-18 | 成都天奥电子股份有限公司 | A kind of nearly carrier frequency Frequency Synthesizer with Low Phase Noise |
| CN109245763B (en) * | 2018-08-21 | 2023-02-14 | 成都天奥电子股份有限公司 | Near-carrier frequency low-phase noise frequency synthesizer |
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