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Microwave band kHz ultra-narrow band-pass filtering device working at normal temperature

A microwave band, band-pass filtering technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve problems such as the inability to meet the needs of filtering

Active Publication Date: 2020-04-21
CHINA ELECTRONICS TECH GRP NO 39 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the passband is adjustable within a certain bandwidth range, the current passband bandwidth is only at the MHz level, which cannot meet the needs of microwave quantum precision measurement for ultra-narrow bandwidth filtering at the kHz level in the microwave band

Method used

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  • Microwave band kHz ultra-narrow band-pass filtering device working at normal temperature
  • Microwave band kHz ultra-narrow band-pass filtering device working at normal temperature
  • Microwave band kHz ultra-narrow band-pass filtering device working at normal temperature

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 2 As shown, the device works under normal temperature conditions, through three-stage down-conversion filtering, surface acoustic wave filtering, and three-stage up-conversion filtering, X-band kHz ultra-narrow bandpass filtering is realized.

[0030] The microwave single-carrier signal in the 9.5GHz~10.5GHz frequency band and the noise signal with a broadband up to 1GHz are input to the device 1, which is used to input the X-band microwave signal; the first-level down converter 2 is used to down-convert the X-band microwave band signal band signal; the primary filter 3 is an L-band bandpass filter, which filters out side frequency signals and strays produced by the primary down-converter 2, and retains useful signals in the passband; the secondary down-converter 4 converts the input L The band signal is down-converted to an intermediate frequency signal; the secondary filter 5 is an intermediate frequency band-pass filter, which filters out side frequen...

Embodiment 2

[0036] Such as image 3 As shown, the device works under normal temperature conditions, through two-stage down-conversion filtering, surface acoustic wave filtering, and two-stage up-conversion filtering, L-band kHz extremely narrow bandpass filtering is realized.

[0037] The L-band microwave single-carrier signal and its noise signal are input to the device 1 for inputting the L-band microwave signal; the secondary down-converter 4 converts the input L-band signal to an intermediate frequency signal; the secondary filter 5 is an intermediate frequency bandpass The filter filters out side frequency signals and spurs generated by the secondary down-converter 4 and retains useful signals in the passband; the third-stage down-converter 6 converts the input intermediate frequency signal into a video signal.

[0038] The surface acoustic wave filter 7 is a video band-pass filter, which filters out side frequency signals and spurs generated by the three-stage down-converter 6, and ...

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Abstract

The invention provides a microwave band kHz ultra-narrow band-pass filtering device working at normal temperature. The microwave band kHz ultra-narrow band-pass filtering device comprises a multi-stage down converter, a multi-stage up converter, a multi-stage filter and a surface acoustic wave filter, wherein the multi-stage down converter and a filter in the multi-stage down converter finally perform down conversion on an input microwave signal to obtain a video signal; the multi-stage up-converter and a filter in the multi-stage up-converter finally convert a video signal input from the surface acoustic wave filter into a microwave band signal; and the microwave band signal obtained by frequency conversion is input into a microwave band band-pass filter to realize kHz ultra-narrow band-pass filtering of the microwave signal. According to the invention, low-temperature refrigeration equipment and environment are not needed, multi-stage down-conversion filtering, surface acoustic wavefiltering and multi-stage up-conversion filtering are carried out on the microwave frequency, the passband bandwidth is reduced to the kHz level, microwave band kHz ultra-narrow band microwave band-pass filtering is achieved, and strict requirements for microwave quantum precision measurement and use are met.

Description

technical field [0001] The invention relates to the field of microwave quantum technology, in particular to a microwave band kHz ultra-narrow band-pass filter device working at room temperature. Background technique [0002] Ultra-narrow band-pass filtering technology in the microwave band is a key technology that is urgently needed in the field of microwave quantum precision measurement. At present, the existing filter technology at home and abroad has a passband bandwidth that can only reach the order of hundreds of kHz, but cannot reach the kHz level. [0003] Microwave bandpass filters can be implemented in the form of waveguide filters. There are two implementation methods: the first is to use high waveguide resonator technology, which increases the height of the narrow side of the waveguide by more than 4 times, significantly reduces the insertion loss of the filter, and increases The Q value of the filter cavity resonator realizes the narrowband filter bandwidth. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 吴养曹陆军袁俊赵军民张雪松李桂红严会玲栾添李宏科郭明
Owner CHINA ELECTRONICS TECH GRP NO 39 RES INST