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Ultra-wideband constant-temperature down converter

A frequency converter and ultra-wideband technology, applied in the field of high-performance ultra-wideband constant temperature converters, can solve problems such as difficulty in guaranteeing, and achieve the effects of reducing output spurious, reducing combined frequency interference, and reducing the number of

Active Publication Date: 2021-08-06
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Ultra-wideband constant-temperature down converter

Examples

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Embodiment Construction

[0019] refer to figure 1 . In the preferred embodiment described below, an ultra-wideband self-cooling down-converter includes: connected to a receiving channel unit, a frequency synthesis unit, an AC / DC power supply unit, a cooling unit, and a control unit, characterized in that; AC / DC The power supply unit converts the external 220V AC into +12V DC to supply power for the control unit, frequency synthesis unit and heat dissipation unit in the equipment; the control unit collects the status of each functional unit, and controls the sub-control, operating frequency, attenuation value, intermediate frequency bandwidth, etc. The parameters are configured and sent 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 and the reference signal from the internal reference clock or external reference clock; the receiving channel unit generates the local oscillator sig...

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Abstract

According to the ultra-wideband constant-temperature down converter disclosed by the invention, down conversion can be carried out on a radio frequency signal of 200 MHz - 12 GHz to an intermediate frequency signal of 1.2 GHz + / -250 MHz. According to the technical scheme, a control unit collects the state of each functional unit and issues the state to each functional unit; a frequency synthesizer unit generates a local oscillator signal LO required by the equipment according to the frequency issued by the control unit; a receiving channel unit carries out frequency spectrum mixing, preselector group filtering and amplification processing on a local oscillation signal LO generated by a frequency synthesizer unit frequency converter local oscillation source and an external high-low frequency band radio frequency signal RF, through at least two-stage frequency conversion, under the control of an FPGA, down-conversion is carried out to obtain an intermediate frequency signal, and a heat dissipation unit carries out heat dissipation and cooling treatment according to a control command issued by the control unit, so that the frequency converter works in a constant temperature range.

Description

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

Claims

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Application Information

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IPC IPC(8): H03D7/16
CPCH03D7/165
Inventor 张仕超史本忠刘田席文君杨俊武付树洪
Owner 10TH RES INST OF CETC
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