CN204103932U - Phase amplitude-matched multi-channel radio frequency simulator - Google Patents
Phase amplitude-matched multi-channel radio frequency simulator Download PDFInfo
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- CN204103932U CN204103932U CN201420657958.3U CN201420657958U CN204103932U CN 204103932 U CN204103932 U CN 204103932U CN 201420657958 U CN201420657958 U CN 201420657958U CN 204103932 U CN204103932 U CN 204103932U
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Abstract
The utility model discloses a kind of Phase amplitude-matched multi-channel radio frequency simulator, comprise the receiving element be electrically connected successively, lower change mixing and filtering unit, signal processing unit, amplitude equalizer, upper change mixing and filtering unit and automatic gain control unit; Receiving element comprises the amplitude limiter, preselection filter, low noise amplifier and the programmable attenuator that are electrically connected successively; Lower change mixing and filtering unit comprises frequency mixer, is connected to the local oscillator unit of frequency mixer local oscillator input, mates isolator and intermediate-frequency filter; Amplitude equalizer comprises main transmission line and is connected in parallel on the resonator on main transmission line; Upper change mixing and filtering unit comprises intermediate-frequency filter, frequency mixer, the local oscillator unit being connected to frequency mixer local oscillator input, coupling isolator and radio-frequency filter; Automatic gain control unit comprises the low noise amplifier, programmable attenuator and the Larger Dynamic amplifier that are electrically connected successively.The utility model improves width phase flatness and consistency between radio frequency analog device multichannel.
Description
Technical field
The utility model belongs to communication, radar, radar simulator, ECM (Electronic Countermeasures) field, is specifically related to a kind of Phase amplitude-matched multi-channel radio frequency simulator.
Background technology
Phase amplitude-matched multi-channel radio frequency simulator can be used for the equipment debugging of tested radar system, functional check, the task such as Performance Evaluation and simulated training, has a wide range of applications in communication, radar, electronic countermeasures etc.At present, at radar test, require more and more higher to the amplitude-phase consistency of multi-channel radio frequency simulator in the application such as electronic countermeasures, spuious, amplitude coincidence, phase equalization weighs the key index of multi-channel radio frequency simulator performance, and it is little to the Research Literature of amplitude-phase consistency aspect, the upconverter amplitude-phase consistency wide to low frequency and narrow bandwidth is only had to do simple introduction, and for frequency up to GHz even the wide band radio-frequency simulator of tens GHzs, reach good amplitude-phase consistency more difficult, therefore the utility model devises the good radio frequency analog device of the amplitude-phase consistency that is suitable for 9.37GHz ± 200MHz high-frequency broadband signal from practical application.
Utility model content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of Phase amplitude-matched multi-channel radio frequency simulator, solves width phase flatness between high-frequency wideband signal RF simulator multichannel and the poor problem of consistency.
In order to realize above-mentioned target, the utility model adopts following technical scheme: Phase amplitude-matched multi-channel radio frequency simulator, it is characterized in that, comprise the receiving element be electrically connected successively, lower change mixing and filtering unit, signal processing unit, amplitude equalizer, upper change mixing and filtering unit and automatic gain control unit.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described receiving element comprises the amplitude limiter, preselection filter, low noise amplifier and the programmable attenuator that are electrically connected successively; Described low noise amplifier adopts the HMC460 amplifier chip of Hittite company.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described lower change mixing and filtering unit comprises frequency mixer, is connected to the local oscillator unit of described frequency mixer local oscillator input, mates isolator and intermediate-frequency filter; Rf inputs and the medium frequency output end of described frequency mixer are connected described coupling isolator respectively, after described intermediate-frequency filter is connected to the coupling isolator of the medium frequency output end of described frequency mixer; Described local oscillator unit comprise be electrically connected successively frequency of phase locking source, four power splitters and power amplifier; Described power amplifier is connected to the local oscillator input of described frequency mixer.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described coupling isolator adopts 3dB attenuator to do impedance matching; Described intermediate-frequency filter is the LC band pass filter of 250MHz ± 200MHz; Described frequency mixer adopts MC54MS-14 chip.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described amplitude equalizer comprises main transmission line and is connected in parallel on the resonator on main transmission line; Described resonator is open circuit minor matters resonator, and described open circuit minor matters resonator comprises resistance and inductance in series with a resistor, electric capacity.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described upper change mixing and filtering unit comprises intermediate-frequency filter, frequency mixer, the local oscillator unit being connected to described frequency mixer local oscillator input, coupling isolator and radio-frequency filter; After described intermediate-frequency filter is placed in and is connected to amplitude equalizer foremost; The IF input terminal of described frequency mixer and radio-frequency (RF) output end matching connection isolator respectively; Described local oscillator unit comprise be electrically connected successively frequency of phase locking source, four power splitters and power amplifier; Described power amplifier is connected to the local oscillator input of described frequency mixer; After described radio-frequency filter is connected to the coupling isolator of described mixer output, adopt interdigital shape cavity body filter.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described automatic gain control unit comprises the low noise amplifier, programmable attenuator and the Larger Dynamic amplifier that are electrically connected successively; Described programmable attenuator adopts absorption programmable attenuator; Described Larger Dynamic amplifier adopts the HMC465 amplifier chip of Hittite company.
Aforesaid Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that, described radio-frequency filter is the cavity body filter of 9.37GHz ± 200MHz; Described intermediate-frequency filter is the LC band pass filter of 250MHz ± 200MHz
The beneficial effect that the utility model reaches: by the receiving element be electrically connected successively, lower change mixing and filtering unit, signal processing unit, amplitude equalizer, upper change mixing and filtering unit and automatic gain control unit, make each channel debugging point completely the same; Wherein amplitude equalizer effectively can compensate the amplitude-frequency inconsistency that whole system is brought due to devices such as transmission cable, frequency converter, amplifiers, the phenomenon particularly strengthened because loss in microwave signal transmission and amplification process increases along with frequency and Digital Signal Processing AD, the amplitude unevenness degree produced in DA conversion process; The radiofrequency signal that up-conversion filter unit exports is carried out power amplification to automatic gain control unit and amplitude precisely exports.The utility model improves width phase flatness and consistency between radio frequency analog device multichannel.
Accompanying drawing explanation
Fig. 1 is radio frequency analog device circuit block diagram;
Fig. 2 is receiving element circuit block diagram;
Fig. 3 is lower change mixing and filtering element circuit block diagram;
Fig. 4 is amplitude equalizer circuit block diagram;
Fig. 5 is upper change mixing and filtering element circuit block diagram;
Fig. 6 is automatic gain control unit circuit block diagram;
The implication of Reference numeral in figure: 1-frequency mixer, 2-power amplifier, 3 is resistance, and 4 is electric capacity, and 5 is inductance.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection range of the present utility model with this.
As shown in Figure 1, Phase amplitude-matched multi-channel radio frequency simulator, comprises the receiving element be electrically connected successively, lower change mixing and filtering unit, signal processing unit, amplitude equalizer, upper change mixing and filtering unit and automatic gain control unit.
Receiving element receives the 9.37GHz ± 200MHz signal from radar, and is transferred to lower change mixing and filtering unit;
9.37GHz ± 200MHz signal from receiving element is downconverted to the intermediate-freuqncy signal of 250MHz ± 200MHz by lower change mixing and filtering unit;
250MHz ± 200MHz intermediate-freuqncy signal amplitude unevenness degree that digital signal processing unit exports by amplitude equalizer is improved to 1dB by 6dB;
250MHz ± 200MHz intermediate-freuqncy signal up-conversion that amplitude equalizer exports by upper change mixing and filtering unit is to the radiofrequency signal of 9.37GHz ± 200MHz;
The radiofrequency signal that upper change mixing and filtering unit exports carries out amplifying by automatic gain control unit and amplitude precisely exports.
Receiving element: as shown in Figure 2, comprises the amplitude limiter, preselection filter, low noise amplifier and the programmable attenuator that are electrically connected successively.Described amplitude limiter is placed in foremost, is not burnt for the protection of circuit below by large input signal; Described preselection filter adopts interdigitated cavity band pass filter, after being connected to amplitude limiter, for selecting Received signal strength; Described low noise amplifier adopts the HMC460 amplifier chip of hittite company, and its noise factor can reach 3dB, after being connected to preselection filter, for being amplified by Received signal strength; After programmable attenuator is connected to low noise amplifier, dynamic for ensureing the reception of signal.
Lower change mixing and filtering unit: as shown in Figure 3, comprises frequency mixer 1, local oscillator unit, coupling isolator and intermediate-frequency filter.The rf inputs of described frequency mixer and medium frequency output end matching connection isolator respectively, the present embodiment coupling isolator selects 3dB attenuator to be used for impedance matching; Described local oscillator unit comprise be electrically connected successively frequency of phase locking source, four power splitters and power amplifier 2; Frequency of phase locking source is for generation of local oscillation signal, and power amplifier 2 is connected to the local oscillator input of frequency mixer; Intermediate-frequency filter is LC band pass filter, is connected to the medium frequency output end of frequency mixer, exports the humorous clutter of intermediate-freuqncy signal for filtering frequency mixer.Frequency mixer adopts MC54MS-14 chip, and the isolation of its intermediate frequency end to local oscillator reaches 40dB, is encapsulated among gold-plated small shell to avoid imperfect earth on the impact of isolation.For avoiding flatness index in impedance operator influence zone, add 3dB attenuator respectively as coupling isolator at the input/output terminal of frequency mixer.Local oscillator unit adopts frequency of phase locking source to provide 9.12GHz local oscillator, and by good four power splitters of phase equalization and isometric cable for each mixing unit provides local oscillation signal.
Signal processing unit: the intermediate-freuqncy signal AD(analog-to-digital conversion that down-conversion exports by signal processing unit) be sampled into digital signal, then signal transacting is carried out, as frequency measurement, direction finding, range finding, combat setting, interference signal pattern etc., then through DA(digital-to-analogue conversion) convert digital signal to analog intermediate frequency signal and export.
Amplitude equalizer: as shown in Figure 4, comprises main transmission line and is connected to the resonator on main transmission line.Described resonator is open circuit minor matters resonator, and multiple resonator is connected in parallel on main transmission line.Open circuit minor matters resonator by resistance 3 connect upper inductance 5, electric capacity 4 parallel resonance form.Amplitude equalizer effectively can compensate the amplitude-frequency inconsistency that whole system is brought due to devices such as transmission cable, frequency converter, amplifiers, the amplitude unevenness degree that produces in the phenomenon particularly strengthened because loss in microwave signal transmission and amplification process increases along with frequency and Digital Signal Processing AD/DA process.The topological structure that amplitude equalizer adopts be the parallel connection of multiple open circuit minor matters resonator on the transmission line.
Upper change mixing and filtering unit: as shown in Figure 5, upper change mixing and filtering unit comprises intermediate-frequency filter, frequency mixer, the local oscillator unit being connected to described frequency mixer local oscillator input, coupling isolator and radio-frequency filter; Described intermediate-frequency filter is placed in and is connected with amplitude equalizer foremost, the humorous clutter in signal processing unit output signal described in filtering; The IF input terminal of described frequency mixer and radio-frequency (RF) output end matching connection isolator respectively; Described local oscillator unit comprise be electrically connected successively frequency of phase locking source, four power splitters and power amplifier; Described power amplifier is connected to the local oscillator input of described frequency mixer; The local oscillator input of input mixer after local oscillation signal amplifies by described local oscillator unit; After described radio-frequency filter is connected to the coupling isolator of described mixer output, adopt interdigitated cavity filter, the humorous clutter after filtering up-conversion and the local oscillation signal of leakage.Automatic gain control unit: comprise the low noise amplifier, programmable attenuator and the Larger Dynamic amplifier that are electrically connected successively, as shown in Figure 6.Described low noise amplifier is arranged on foremost, after being connected to change mixing and filtering unit, for making up the loss of mixing and filtering circuit, be conducive to the noise factor improving radio frequency analog device, avoid the excessive signal to noise ratio affecting output signal that decays, after described programmable attenuator is connected to low noise amplifier, before the amplifying circuit easily occurring linear distortion, the attenuation range of programmable attenuator is greater than input range; Arrange low noise amplifier before programmable attenuator, both can make up the loss of front stage circuits, be conducive to again the noise factor improving radio frequency analog device, avoiding decaying excessively affects output signal-to-noise ratio; After described Larger Dynamic amplifier is connected to programmable attenuator, for meeting the index such as output level and intermodulation.For guaranteeing amplitude-phase consistency, adopt absorption programmable attenuator to ensure good stationary wave characteristic.The radiofrequency signal that up-conversion filter unit exports is carried out power amplification to automatic gain control unit and amplitude precisely exports, thus reach good amplitude flatness and consistency.
The present embodiment implementation process:
The radiofrequency signal received is sent to lower change mixing and filtering unit by receiving element, and lower change mixing and filtering unit fades to intermediate-freuqncy signal by under the radiofrequency signal received; Intermediate-freuqncy signal AD is sampled into digital signal by signal processing unit, carries out Digital Signal Processing, as conventional processing modes such as frequency measurement, direction finding, range finding, combat setting, interference signal patterns, then converts analog intermediate frequency signal output to through DA conversion; The amplitude unevenness degree that amplitude equalizer compensating signal produces when lower change and Digital Signal Processing; The intermediate-freuqncy signal that amplitude equalizer exports by upper change mixing and filtering unit fades to radiofrequency signal; The radiofrequency signal that up-conversion filter unit exports is carried out power amplification to automatic gain control unit and amplitude precisely exports.
Surveying 400MHz amplitude of bandwidth consistency in final radio frequency analog device each interchannel output signal 9.37GHz ± 200MHz passband is 1.1dB, and phase equalization is within 10 °.
The utility model is by arranging rational receiving element, upper and lower frequency conversion mixing and filtering unit, amplitude equalizer, signal processing unit and automatic gain control unit, make each channel debugging point completely the same, make width phase flatness and consistency between radio frequency analog device multichannel good.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection range of the present utility model.
Claims (8)
1. a Phase amplitude-matched multi-channel radio frequency simulator, is characterized in that: comprise the receiving element be electrically connected successively, lower change mixing and filtering unit, signal processing unit, amplitude equalizer, upper change mixing and filtering unit and automatic gain control unit.
2. Phase amplitude-matched multi-channel radio frequency simulator according to claim 1, is characterized in that, described receiving element comprises the amplitude limiter, preselection filter, low noise amplifier and the programmable attenuator that are electrically connected successively; Described low noise amplifier adopts the HMC460 amplifier chip of Hittite company.
3. Phase amplitude-matched multi-channel radio frequency simulator according to claim 1, is characterized in that, described lower change mixing and filtering unit comprises frequency mixer, is connected to the local oscillator unit of described frequency mixer local oscillator input, mates isolator and intermediate-frequency filter; Rf inputs and the medium frequency output end of described frequency mixer are connected described coupling isolator respectively, after described intermediate-frequency filter is connected to the coupling isolator of the medium frequency output end of described frequency mixer; Described local oscillator unit comprise be electrically connected successively frequency of phase locking source, four power splitters and power amplifier; Described power amplifier is connected to the local oscillator input of described frequency mixer.
4. Phase amplitude-matched multi-channel radio frequency simulator according to claim 3, is characterized in that, described coupling isolator adopts 3dB attenuator to do impedance matching; Described intermediate-frequency filter is the LC band pass filter of 250MHz ± 200MHz; Described frequency mixer adopts MC54MS-14 chip.
5. Phase amplitude-matched multi-channel radio frequency simulator according to claim 1, is characterized in that, described amplitude equalizer comprises main transmission line and is connected in parallel on the resonator on main transmission line; Described resonator is open circuit minor matters resonator, and described open circuit minor matters resonator comprises resistance and inductance in series with a resistor, electric capacity.
6. Phase amplitude-matched multi-channel radio frequency simulator according to claim 1, it is characterized in that, described upper change mixing and filtering unit comprises intermediate-frequency filter, frequency mixer, the local oscillator unit being connected to described frequency mixer local oscillator input, coupling isolator and radio-frequency filter; After described intermediate-frequency filter is placed in and is connected to amplitude equalizer foremost; The IF input terminal of described frequency mixer and radio-frequency (RF) output end matching connection isolator respectively; Described local oscillator unit comprise be electrically connected successively frequency of phase locking source, four power splitters and power amplifier; Described power amplifier is connected to the local oscillator input of described frequency mixer; After described radio-frequency filter is connected to the coupling isolator of described frequency mixer radio-frequency (RF) output end, adopt interdigital shape cavity body filter.
7. Phase amplitude-matched multi-channel radio frequency simulator according to claim 1, is characterized in that, described automatic gain control unit comprises the low noise amplifier, programmable attenuator and the Larger Dynamic amplifier that are electrically connected successively; Described programmable attenuator adopts absorption programmable attenuator; Described Larger Dynamic amplifier adopts the HMC465 amplifier chip of Hittite company.
8. Phase amplitude-matched multi-channel radio frequency simulator according to claim 6, is characterized in that, described radio-frequency filter is the cavity body filter of 9.37GHz ± 200MHz; Described intermediate-frequency filter is the LC band pass filter of 250MHz ± 200MHz.
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| CN201420657958.3U CN204103932U (en) | 2014-11-06 | 2014-11-06 | Phase amplitude-matched multi-channel radio frequency simulator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104820208A (en) * | 2015-03-30 | 2015-08-05 | 中国电子科技集团公司第三十八研究所 | Apparatus of four-surface flat wire-free packaging type radar transceiving assembly |
| CN104833956A (en) * | 2015-03-30 | 2015-08-12 | 中国电子科技集团公司第三十八研究所 | Device with lead wire surface mounting radar transmitting-receiving assembly |
| CN106887998A (en) * | 2017-03-10 | 2017-06-23 | 成都金广通科技有限公司 | The amplitude modulation module of mobile terminal data acquisition system |
| CN109194347A (en) * | 2018-10-12 | 2019-01-11 | 南京屹信航天科技有限公司 | It is a kind of for minimizing the intermediate-frequency circuit of ODU receiving channel |
| CN109547023A (en) * | 2018-11-19 | 2019-03-29 | 中电科仪器仪表有限公司 | A kind of processing circuitry of intermediate frequency and implementation method |
| CN112583360A (en) * | 2021-02-25 | 2021-03-30 | 成都市克莱微波科技有限公司 | Power amplifier amplitude and phase consistency debugging device and method |
| CN112615646A (en) * | 2020-12-09 | 2021-04-06 | 中国科学院新疆天文台 | Four-channel intermediate frequency equalizing amplification module used for radio astronomical receiver |
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- 2014-11-06 CN CN201420657958.3U patent/CN204103932U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820208A (en) * | 2015-03-30 | 2015-08-05 | 中国电子科技集团公司第三十八研究所 | Apparatus of four-surface flat wire-free packaging type radar transceiving assembly |
| CN104833956A (en) * | 2015-03-30 | 2015-08-12 | 中国电子科技集团公司第三十八研究所 | Device with lead wire surface mounting radar transmitting-receiving assembly |
| CN106887998A (en) * | 2017-03-10 | 2017-06-23 | 成都金广通科技有限公司 | The amplitude modulation module of mobile terminal data acquisition system |
| CN109194347A (en) * | 2018-10-12 | 2019-01-11 | 南京屹信航天科技有限公司 | It is a kind of for minimizing the intermediate-frequency circuit of ODU receiving channel |
| CN109194347B (en) * | 2018-10-12 | 2024-01-23 | 南京屹信航天科技有限公司 | Intermediate frequency circuit for miniaturized ODU receiving channel |
| CN109547023A (en) * | 2018-11-19 | 2019-03-29 | 中电科仪器仪表有限公司 | A kind of processing circuitry of intermediate frequency and implementation method |
| CN109547023B (en) * | 2018-11-19 | 2022-12-09 | 中电科思仪科技股份有限公司 | Intermediate frequency processing circuit and implementation method |
| CN112615646A (en) * | 2020-12-09 | 2021-04-06 | 中国科学院新疆天文台 | Four-channel intermediate frequency equalizing amplification module used for radio astronomical receiver |
| CN112615646B (en) * | 2020-12-09 | 2022-06-17 | 中国科学院新疆天文台 | Four-channel intermediate frequency equalizing amplification module used for radio astronomical receiver |
| CN112583360A (en) * | 2021-02-25 | 2021-03-30 | 成都市克莱微波科技有限公司 | Power amplifier amplitude and phase consistency debugging device and method |
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