Multi-octave broadband frequency conversion assembly

Abstract

The invention discloses a multi-octave broadband frequency conversion assembly which comprises a frequency conversion circuit, an amplitude control circuit and a switch filter bank, the frequency conversion circuit broadens an input radio frequency into an intermediate frequency signal through two local oscillator frequency points for the input radio frequency signal, and outputs the intermediate frequency signal to the amplitude control circuit; the amplitude control circuit adjusts the amplitude of the intermediate frequency signal output by the frequency conversion circuit; and the switch filter bank carries out segmented filtering on the signal output by the amplitude control circuit through the multi-path filter bank, harmonic waves and stray waves are filtered out, and amplitude correction is carried out to obtain a multi-octave intermediate frequency output signal. According to the invention, the frequency of a 3-4GHz signal is broadened to a 0.2-2GHz ten-time range signal which can be directly processed by a digital circuit through two local frequency points of 4 / 5GHz, the output power reaches 10dBm, meanwhile, the harmonic suppression reaches over 48dBc, the power flatness reaches + / -1dB, the dynamic range reaches over 60dB, and the stepping is only 0.25 dB.

Description

technical field [0001] The invention relates to the technical field of microwave radar, in particular to a multi-octave broadband frequency conversion component. Background technique [0002] Microwave inverters play an extremely important role in the field of microwave detection. As the use of frequency band resources becomes increasingly tense, various electromagnetic interferences will increase in the communication environment, and the requirements for information detection radars tend to be highly integrated. Accurate, high-performance direction development. In terms of high integration, the hybrid integrated circuit technology is used to integrate various high-performance chips such as mixers, low-noise amplifiers, switches and digitally controlled attenuators produced by various semiconductor device processes to achieve miniaturization and The demand for mobility; In terms of high performance, the frequency width covered by frequency conversion components is getting w...

AI Technical Summary

Problems solved by technology

[0003] The wideband frequency conversion system used to detect radar receivers, the radio frequency front-end module scheme working in the 0.2-2GHz frequency band has been relatively mature. At present, the main problems of this scheme are concentrated on the problems of spurious suppression and harmonic suppression under broadband conditions

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