Multi-channel radio frequency receiving device and multi-channel down-conversion assembly

Abstract

According to the multichannel radio frequency receiving device, each channel comprises a K / S frequency conversion module and an S / P module, and each K / S frequency conversion module comprises an amplitude limiter, a first amplifier, a first band-pass filter, a first frequency mixer and a second band-pass filter which are connected in sequence; the S / P module comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a third band-pass filter which are connected in sequence; and the input of the second amplifier is the output of the second band-pass filter. Compared with a traditional multi-channel design, a local oscillator signal is firstly driven and then enters the 0-degree power divider, the amplitude-phase consistency of the multi-channel local oscillator signal is greatly ensured, and the amplitude-phase consistency among multiple channels is greatly improved due to the fact that the digital attenuator and the phase compensation network are additionally arranged in the receiving channel of the secondary frequency conversion.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a K-band secondary frequency conversion multi-channel down conversion component. Background technique [0002] As an indispensable part of the digital phased array system, the multi-channel down-conversion component has an important impact on the performance of the phased array system. The main function of the multi-channel down-conversion component is to realize frequency conversion. The signal is converted to a low-intermediate frequency signal, and after filtering and amplifying, the transmission and reception of the signal is completed, which is the link between signal transmission and processing. [0003] For example, the existing patent application number is 202011575597.4, the application date is 2020.12.28, and the invention patent named "miniature multi-channel frequency conversion component for the enemy and the enemy", the technical solution includes a b...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of the existing multi-channel down-conversion components working in higher frequency bands, such as fewer channels, more spurs, high technical difficulty, poor reliability, and difficulty in ensuring the accuracy of amplitude-phase consistency between receiving channels, the present invention proposes a Multi-channel RF receiving device and multi-channel down-conversion components, the output spurious suppression is good, and the amplitude and phase of each receiving channel can be adjusted separately

Images