CN205017311U - 3-18GHz microwave receiving front end - Google Patents
3-18GHz microwave receiving front end Download PDFInfo
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- CN205017311U CN205017311U CN201520842777.2U CN201520842777U CN205017311U CN 205017311 U CN205017311 U CN 205017311U CN 201520842777 U CN201520842777 U CN 201520842777U CN 205017311 U CN205017311 U CN 205017311U
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Abstract
The utility model provides a 3-18GHz microwave receiving front end, including clipper -limiter, sensitivity selector, preselection filter, mixer circuit, intermediate frequency circuit and local oscillator, incoming signal is received by the antenna and gets into the clipper -limiter, and the clipper -limiter prevents to burn out the receiver to big signal amplitude limiting, the sensitivity selector is inputed to the signal behind the clipper -limiter, the sensitivity selector carries out the gain select according to signal intensity, selects to enlarge or direct state for improve the dynamic of receiver, the signal is via inputing preselection filter, preselection filter filtering image frequency signal after sensitivity is selected, mixer circuit is sent into to the signal behind the preselection filter, carry out the down coversion with the local oscillator signal, becomes intermediate frequency signal, the intermediate frequency circuit enlargies intermediate frequency signal, filtering radio frequency and local oscillator signal to an intermediate frequency bandwidth of it is required is provided. The utility model discloses small, light in weight, low power dissipation.
Description
Technical field
The utility model belongs to electronic warfare, wireless frequency spectrum monitoring technical field, is specifically related to a kind of hand-held microminiature, low-power consumption 3 ~ 18GHz microwave receiving front end.
Background technology
Hand-held 3 ~ 18GHz microwave receiving front end is a kind of electronic unit be mainly used in electronic countermeasures and wireless frequency spectrum monitoring isoelectronic series system equipment.Current 3 ~ 18GHz microwave receiving front end, adopts the scheme being converted to intermediate frequency.3 ~ 18GHz microwave receiving front end needs preselection filter to carry out image frequency suppression; Suppress the index request of 60dBc to reach image frequency, current preselection filter adopts cavity body filter, and the volume of cavity body filter is large, Heavy Weight.The frequency conversion of 3 ~ 18GHz microwave receiving front end adopts superheterodyne receiver, needs local oscillator bandwidth consistent with signal bandwidth, and local oscillation circuit is complicated, and power consumption is high, volume is large.
Summary of the invention
The purpose of this utility model is the hand-held 3 ~ 18GHz microwave receiving front end providing a kind of volume little, lightweight, low in energy consumption, optimizes frequency changer circuit, makes preselection filter can adopt MEMS filter, effectively reduce size and weight; Frequency conversion local oscillator adopts height local oscillator, and local oscillation circuit is accomplished to simplify most, substantially reduces power consumption and volume.
In order to solve the problems of the technologies described above, the utility model provides a kind of 3 ~ 18GHz microwave receiving front end, comprises amplitude limiter, sensitivity selector, preselection filter, mixting circuit, intermediate-frequency circuit and local oscillator; Amplitude limiter, sensitivity selector, preselection filter, mixting circuit and intermediate-frequency circuit connect successively, and the output of local oscillator is connected with mixting circuit input.Input signal is received by antenna and enters amplitude limiter, and amplitude limiter, to large-signal amplitude limit, prevents from burning receiver; Signal is input to sensitivity selector after amplitude limiter, and sensitivity selector carries out gain selection according to signal strength signal intensity, selects to amplify or pass-through state, in order to improve the dynamic range of receiver; Signal is input to preselection filter, preselection filter filtering image frequency signal after selecting via sensitivity; Signal sends into mixting circuit after preselection filter, carries out down-conversion, become intermediate-freuqncy signal with local oscillation signal; Intermediate-frequency circuit amplifies intermediate-freuqncy signal, filtering radio frequency and local oscillation signal, and provides required intermediate-frequency bandwidth.
Further, amplitude limiter adopts arsenic to sow monolithic; Preselection filter adopts MEMS filter; Mixting circuit is made up of amplifier, equalizer, frequency mixer; Signal is amplified to required level by amplifier, is undertaken compensating signal amplitude-frequency characteristic by equalizer; Equalizer adopts matched equalizing circuit, makes, effectively reduce volume, improve Circuit Matching of ceramic substrate, and the signal after equilibrium is sent in frequency mixer and carried out down-conversion with local oscillation signal, becomes intermediate-freuqncy signal; Equalizer adopts thin film circuit technique to make on a ceramic substrate; Local oscillator adopts height local oscillation circuit, and provide down the signal changed to needed for intermediate frequency, and adopt the monocycle phase lock circuitry of fractional frequency division directly to produce 10 ~ 20GHz signal, below 10G adopts frequency dividing circuit to expand.
Compared with prior art, its remarkable advantage is the utility model, and (1) preselection filter adopts MEMS filter, substantially reduces volume, weight; (2) local oscillator adopts height local oscillator, and circuit design is simple, as long as the fractional frequency-division phase-locked loop of design 10 ~ 20GHz, effectively reduces power consumption, weight; (3) equalizing circuit adopts matched equalizing circuit, and make of ceramic substrate, input and output standing wave is good, and volume is little.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the utility model 3 ~ 18GHz microwave receiving front end.
Fig. 2 is the circuit block diagram of local oscillator of the present utility model.
Fig. 3 is the circuit block diagram of sensitivity selector of the present utility model.
Fig. 4 is intermediate-frequency circuit block diagram of the present utility model.
Embodiment
Easy understand, according to the technical solution of the utility model, when not changing connotation of the present utility model, one of ordinary skill in the art can imagine the numerous embodiments the utility model 3 ~ 18GHz microwave receiving front end.Therefore, following embodiment and accompanying drawing are only the exemplary illustrations to the technical solution of the utility model, and should not be considered as of the present utility model all or the restriction be considered as technical solutions of the utility model or restriction.
Composition graphs 1, Fig. 2,3 ~ 18GHz microwave receiving front end of the present utility model, it is by amplitude limiter, sensitivity selector, preselection filter, mixting circuit, intermediate-frequency circuit and local oscillator.Intermediate frequency output frequency 2.37GHz, bandwidth 22MHz.The key technical indexes has: 1. minimum frequency resolution: be less than 10MHz; 2. noise factor :≤9dB; 3. input three rank section IIP3: >=-10dBm; 4. input second-order intercept point: >=40dBm; 5. intermediate frequency suppresses: >=60dB; 6. picture frequency suppresses: >=60dB; 7. phase noise (representative value) :≤-75dBc/Hz1kHz ,≤-75dBc/Hz10kHz ,≤-75dBc/Hz100kHz; 8. frequency converting time :≤1ms; 9. gain: 20 ± 3dB; 10. built-in 31dB attenuator, stepping is 1dB; 11. use outside mark frequently: 57.344MHz, 0dBm; 12. maximum resisting burnt power: 1W; 13. supply power modes: DC:+24.5V ,+5.5V and-5.5V; 14. power consumptions :≤6.0W; 15. overall dimensions: (length) 150mm × (wide) 100mm × (height) 25mm; 16. weight :≤0.55kg;
Composition graphs 2, local frequency is 5.37-16.62GHz, and stepping is 7.168M, and make an uproar representative value 75dBc/Hz1kHz mutually, is spuiously less than 55dBc, and power output is greater than 13dBm, and Hopping time is less than 1mS.Reference frequency is outer input 57.344M, and phase-locked loop (PLL) chip is ADI company universal serial bus fractional frequency division PLLADF4156.Phase noise, frequency step and Hopping time must be taken into account very well.VCO 10 ~ 20GHz monolithic MMIC, by the microstrip power divider be directly integrated in microwave board, be divided into two-way, one route four frequency division ADF5001 frequency division, phase demodulation is carried out to ADF4156, ADF4156 exports phase demodulation electric current, and the three order active filter be made up of rail-to-rail amplifier OP284 is converted to error voltage, in 10 ~ 20GHz frequency, lock VCO.Another road exports and first selects two states by single-pole double-throw switch (SPDT) HMC547LP3, and one is through two divided-frequency ADF5000, produces the local frequency of 5 ~ 10GHz, and it is the local frequency of 10 ~ 20GHz that a road leads directly to.Then sow (GaAS) monolithic HMC462 by A1, A2 arsenic and be amplified to required local oscillation power.Adopt Reflow Soldering and micro-assembling hybrid technique, effectively must reduce volume.Whole local oscillator is of a size of 100X21mm, and power consumption only has 1.4 watts.
Amplitude limiter adopts arsenic to sow monolithic, and volume is little.Sensitivity selector as shown in Figure 3, is divided into three tunnels with single-chip switching MASW-003102-13590, and road secondary LNA HMC462 amplifies, and improves receiving sensitivity.One tunnel leads directly to, linearly poor due to frequency high side device, connects the band pass filter of 14 ~ 18GHz in order to meet another road of IP2 index.
Preselection filter monolithic MMIC eight way switch, filter MEMS filter.In order to better shielding, with microwave assembly technology, preselection filter is assemblied in separately in a box body, size 73X73.5X11.5mm, power consumption 1.265 watts.Suppress to reach 60dBc to image frequency, filter frequencies divides and sees the following form with suppressing requirement:
Equalizer design is that matched is balanced, and be made up of three resistance and three resonant tanks, input and output standing wave is good, improves interstage matched.Whole circuit unit adopts thin film circuit technique to make on a ceramic substrate.Effectively reduce circuit size.
Composition graphs 4, intermediate-frequency circuit, first by low pass (U1) filtering, suppresses radio frequency and local oscillation signal; Amplifier A1 selects intermediate-frequency bandwidth with band pass filter (U2) after amplifying; ATT1 is the attenuator of 31dB attenuation, 1dB stepping, the parasitic passband of low-pass filtering (U3) filter out-band bandpass filter; Be amplified to required gain by A2, band pass filter (U4) filters harmonic wave and the band met needed for receiver resists index outward.Intermediate-frequency circuit is of a size of 46X37mm, and power consumption only has 0.726 watt.
Claims (4)
1. 3 ~ 18GHz microwave receiving front end, is characterized in that, comprises amplitude limiter, sensitivity selector, preselection filter, mixting circuit, intermediate-frequency circuit and local oscillator; Amplitude limiter, sensitivity selector, preselection filter, mixting circuit and intermediate-frequency circuit connect successively, and the output of local oscillator is connected with mixting circuit input.
2. microwave receiving front end as claimed in claim 1, it is characterized in that, amplitude limiter is that arsenic sows single chip architecture.
3. microwave receiving front end as claimed in claim 1, it is characterized in that, preselection filter is MEMS filter.
4. microwave receiving front end as claimed in claim 1, it is characterized in that, mixting circuit is made up of amplifier, equalizer, frequency mixer; Amplifier, equalizer, frequency mixer connect successively, and the output of local oscillator is connected with mixer input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520842777.2U CN205017311U (en) | 2015-10-28 | 2015-10-28 | 3-18GHz microwave receiving front end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520842777.2U CN205017311U (en) | 2015-10-28 | 2015-10-28 | 3-18GHz microwave receiving front end |
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| CN205017311U true CN205017311U (en) | 2016-02-03 |
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| CN201520842777.2U Active CN205017311U (en) | 2015-10-28 | 2015-10-28 | 3-18GHz microwave receiving front end |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787646A (en) * | 2018-12-30 | 2019-05-21 | 扬州海科电子科技有限公司 | A kind of 6-18GHz Phase amplitude-matched down conversion components |
| CN115567070A (en) * | 2022-11-23 | 2023-01-03 | 中国电子科技集团公司第二十九研究所 | Front end assembly capable of self-adapting to instantaneous dynamic expansion |
-
2015
- 2015-10-28 CN CN201520842777.2U patent/CN205017311U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787646A (en) * | 2018-12-30 | 2019-05-21 | 扬州海科电子科技有限公司 | A kind of 6-18GHz Phase amplitude-matched down conversion components |
| CN109787646B (en) * | 2018-12-30 | 2021-01-08 | 扬州海科电子科技有限公司 | 6-18GHz amplitude-phase consistent down-conversion assembly |
| CN115567070A (en) * | 2022-11-23 | 2023-01-03 | 中国电子科技集团公司第二十九研究所 | Front end assembly capable of self-adapting to instantaneous dynamic expansion |
| CN115567070B (en) * | 2022-11-23 | 2023-03-14 | 中国电子科技集团公司第二十九研究所 | Front end assembly capable of self-adapting to instantaneous dynamic expansion |
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