Seminorm substrate integration waveguide double-balance mixer and implementing method thereof

Abstract

The invention discloses a semi model substrate integrated waveguide double balanced mixer and an implementation method thereof. The double balanced mixer consists of an RF Balun, a local oscillation Balun, an RF waveguide cavity, a local oscillation waveguide cavity, a mixing tube and a low-pass filter. The implementation method comprises the following steps: a) RF signals are caused to go through the RF Balun so as to obtain RF isolation signals, local oscillation signals are caused to go through the local oscillation Balun so as to obtain local oscillation isolation signals and the amplitude of the RF isolation signals is equal to that of the local oscillation isolation signals while the phase difference is 180 degrees; b) the RF isolation signals and the local oscillation isolation signals in the step a are caused to go through the mixing tube so as to obtain mixing signals; and c) the mixing signals in the step b are caused to go through the low-pass filter so as to obtain intermediate-frequency signals. The double balanced mixer provided by the invention reduces the volume of the Balun and has high mixing efficiency, wide bandwidth and simple structure, thus being very easy to be realized in the Balun engineering.

Description

technical field [0001] The invention relates to a microwave and millimeter wave double-balanced mixer and a realization method thereof, in particular to a double-balanced mixer based on a half-mode substrate integrated waveguide and a realization method thereof. Background technique [0002] Microwave mixers have been widely used in microwave and millimeter wave radio frequency systems. It is a key part of transceivers. It is generally used as the first or second part of the input to down-convert the received radio frequency signal to an intermediate frequency signal. In order to further process and recover the signal; or up-convert the intermediate frequency signal to microwave and millimeter wave signals to facilitate its propagation in space. The development of communication technology requires that each component is easy to integrate, miniaturized, lightweight and highly reliable, and the performance of the mixer directly affects the performance of the entire system. Tr...

AI Technical Summary

Problems solved by technology

Traditional microwave mixers, due to the use of passive circuits with microstrip structures, have large energy leakage, radiation and interference, and low frequency conversion efficiency; the loss of performance in the microwave and millimeter wave bands with higher frequencies is more significant

At the same time, this type of structure needs to occupy the surface area of ​​the circuit board, which reduces the integration of the mixer and the entire microwave and millimeter wave system.

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