Broadband electric signal mixer and method

Abstract

The invention discloses a broadband electric signal mixer and a method. The method comprises the following steps: at an input end, respectively inputting two paths of coherent light signals with light carrier frequencies of fc and same intensity into two IQ modulators to serve as modulated light signals, and respectively inputting a broadband radio frequency signal RF and a local oscillator electric signal LO into a first IQ modulator and a second IQ modulator to serve a modulated electric signals so as to realize the electro-optic conversion and spectrum shifting of the electric signals; and at an output end, respectively inputting two paths of modulation signals output by the firs IQ modulator and the second IQ modulator to a receipt signal input end and a light local oscillator signal input end of alight coherent receiver, and outputting a variable frequency signal of the broadband radio frequency signal RF by utilizing beat frequencies of two paths of light signals. According to the broadband electric signal mixer and the method, through utilizing the technical characteristics of light signal modulation and coherent reception, electro-optic-electro conversion is carried out on the wide-spectrum RF signal, and through utilizing the high-bandwidth characteristic of the optical device, the spectrum shifting of the signals is completed and the function of the ultra-wide electrified mixer is realized, so that the mixing performance of the system is improved on the whole.

Description

technical field [0001] The invention relates to a mixer, in particular to a broadband electric signal mixer and method. Background technique [0002] The mixer is an indispensable component in the microwave integrated circuit transceiver system. In microwave communication, measurement, remote sensing and radar systems, it is necessary to mix the medium and low frequency signals to high frequency for transmission, and at the same time, the received high frequency signal It must also be mixed to the low and medium frequencies for processing. The mixer actually plays the role of spectrum shifting. It is one of the key components in the microwave circuit, and its performance plays a vital role in the whole system. [0003] The ultra-wideband mixer has a large RF signal frequency working range and local oscillator frequency input range, so it can flexibly move the spectrum of the wide-spectrum baseband RF signal, and adjust the spectrum range occupied by the transmission signal ...

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the problem that the signal mixed by the mixer must work within a certain narrowband band-pass spectrum range, which restricts the realization of the ultra-wideband mixer

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