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X-frequency-range extra-low inter-modulation frequency converter device of measurement and control system

A frequency converter and frequency band technology, applied in the field of signal receiving equipment with extremely low signal-to-noise ratio, to achieve the effects of suppressing spurious strays, good impedance matching, and easy control

Inactive Publication Date: 2013-03-27
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to improve the traditional frequency converter design scheme, suppress the intermodulation component in the receiving link below the system noise, and meet the requirements for frequency conversion equipment for weak signal reception in deep space systems

Method used

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  • X-frequency-range extra-low inter-modulation frequency converter device of measurement and control system

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Embodiment Construction

[0012] refer to figure 1 , X-band isolator 1, X-band filter 2, X-band mixer 3, local oscillator isolator 4, an intermediate frequency low-pass filter 5, an intermediate frequency band-pass filter 6, an intermediate frequency amplifier 7, the second Mixer 8, two local oscillator isolators 9, two intermediate frequency low-pass filters 10, two intermediate frequency bandpass filters 11, program-controlled attenuator 12 and two intermediate frequency amplifiers 13.

[0013] In the present invention, the X-band isolator 1 performs microwave isolation on the externally input radio frequency signal and outputs it to the X-band filter 2, and the X-band filter 2 filters out the spurious and interference signals in the input signal, and sends them to the X-band mixer. The RF input port of the frequency converter 3; the local oscillator input is sent to the local oscillator input port of the X-band mixer 3 after being impedance-matched by the local oscillator isolator 4; the X-band mixe...

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Abstract

The invention discloses an X-frequency-range extra-low inter-modulation frequency converter device of a measurement and control system. The X-frequency-range extra-low inter-modulation frequency converter device comprises an X-frequency-range isolator (1), an X-frequency-range filter (2), an X-frequency-range mixer (3), a first local oscillator isolator (4), a first intermediate-frequency low pass filter (5), a first intermediate-frequency band pass filter (6), a first intermediate-frequency amplifier (7), a second mixer (8), a second local oscillator isolator (9), a second intermediate-frequency low pass filter (10), a second intermediate-frequency band pass filter (11), a programmable attenuator (12) and a second intermediate-frequency amplifier (13). The X-frequency-range extra-low inter-modulation frequency converter device has the advantages of being stable in gain phase and low in inter-modulation signal and can be applied to a signal receiving chain with extra-low signal to noise ratio of a deep space measurement and control system.

Description

technical field [0001] The invention relates to a system X-band extremely low intermodulation frequency converter device in the field of aerospace measurement and control, and is particularly suitable for receiving equipment with an extremely low signal-to-noise ratio in a deep space measurement and control system. Background technique [0002] In the deep space measurement and control system, since the target is far away from the measuring station, ranging from tens of millions to hundreds of millions of kilometers, the received signal is very weak. In order to effectively extract useful information from the received weak signal, it is necessary to develop an extremely low intermodulation The frequency converter equipment is used to effectively control the harmful intermodulation components in the receiving link and improve the system's ability to receive weak signals. Contents of the invention [0003] The technical problem to be solved by the present invention is to imp...

Claims

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Application Information

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IPC IPC(8): H03D7/16
Inventor 汪沛檀祝根耿虎军刘凯辉高延生
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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