Substrate integrated waveguide subharmonic upper frequency changer

Abstract

The invention discloses a substrate-integrated waveguide subharmonic up-converter for microwave and millimeter-wave circuits, which comprises a dielectric substrate, on which an intermediate frequency signal transmission line is arranged, an open circuit branch is connected to the dielectric substrate, and an open-circuit branch is connected to the connection. The microstrip and the substrate integrated waveguide converter are also provided with a local oscillator signal transmission line on the dielectric substrate 1, and a short-circuit branch is connected to the local oscillator signal transmission line, and a connection between the intermediate frequency signal transmission line and a quarter of the local oscillator wavelength open circuit branch A parallel diode pair is connected between the central point and the connection center point of the local oscillator signal transmission line and the half-radio frequency short-circuit branch, and the substrate-integrated waveguide is connected to the microstrip-substrate-integrated waveguide converter, and the substrate-integrated The other end of the waveguide is connected with a substrate-integrated waveguide and a microstrip converter. The substrate-integrated waveguide is composed of a dielectric substrate with metal patches on both sides and two rows of metallized through holes. There are discontinuities to eliminate holes.

Description

Technical field [0001] The invention relates to a sub-harmonic up-converter for microwave and millimeter waves, in particular to a substrate-integrated waveguide sub-harmonic up-converter that can be used in the design of microwave and millimeter wave circuits. Background technique [0002] Microwave sub-harmonic upconverters have been widely used in microwave and millimeter wave radio frequency systems. It is a key component of the transmitter. It up-converts intermediate frequency signals to microwave and millimeter wave signals so that they can propagate in space; The harmonics of the local oscillator signal are mixed with the intermediate frequency signal, so it can work at a very high frequency, which is suitable for low-cost design of microwave and millimeter waves. Because of the harmonic mixing, the traditional sub-harmonic up-converter is difficult to filter out the local oscillator signal leaking to the radio frequency and the low-end image signal of the radio frequency...

AI Technical Summary

Problems solved by technology

Due to harmonic mixing, it is difficult for traditional subharmonic upconverters to filter out the LO signal leaked to RF and the low-end image signal of RF relative to the secondary LO

In this way, the signal transmitted to the radio frequency contains many strong power clutter, which will deteriorate the quality of the radiated radio frequency signal and affect the quality of communication

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