Ultra-Broadband Constant Temperature Downconverter

Abstract

The invention discloses an ultra-wideband constant temperature down-converter, which can down-convert a 200MHz-12GHz radio frequency signal to an intermediate frequency signal of 1.2GHz±250MHz. The present invention is realized by the following technical solutions: the control unit collects the status of each functional unit and issues it to each functional unit; the frequency synthesis unit generates the local oscillator signal LO required by the device according to the frequency issued by the control unit; the receiving channel unit The local oscillator signal LO generated by the frequency converter local oscillator source of the frequency synthesis unit and the external high and low frequency band radio frequency signal RF are subjected to spectrum mixing, preselector group filtering and amplification processing. IF signal, the cooling unit performs heat dissipation and cooling treatment on the equipment according to the control command issued by the control unit, so that the inverter can work within a constant temperature range.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a high-performance (receiving frequency bandwidth, power tolerance, high amplitude-frequency characteristic) ultra-wideband constant temperature downconverter that can be applied to an ultra-wideband system. Background technique [0002] With the rapid development of electronic technology, the frequency band of the signal that needs to be detected is wider and wider. In traditional wideband RF applications such as radars, scanning receivers, etc., a single receiver chain is often not wide enough to cover the entire useful bandwidth, and multiple parallel signal chains are often used to simulate a single wideband receiver chain, resulting in cost and Higher complexity and longer design time. As the front end of the equipment for acquiring information, the broadband receiving system not only has the characteristics of wide instantaneous bandwidth, high sensitivity and large ...

AI Technical Summary

Problems solved by technology

[0004] When down-converting the input RF signal from 200MHz to 12GHz to an intermediate frequency of 1.2GHz, since the receiving frequency band of the inverter spans multiple octaves, the spurious interference of the signal will be very serious; at the same time, when the input signal has a wide bandwidth, The signal flatness index after the broadband frequency converter is also a technical difficulty that is difficult to guarantee

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