Millimeter-wave even harmonic mixer structure

Abstract

The invention discloses a millimeter-wave even harmonic mixer structure. The millimeter-wave even harmonic mixer structure comprises a frequency-mixing microstrip chip, an antiparallel diode pair, a local-oscillator low-pass filter and an intermediate-frequency low-pass filter, wherein the frequency-mixing microstrip chip is disposed in a radio-frequency waveguide in a direction identical with the waveguide and is disposed in the center of a broadside of the radio-frequency waveguide, the antiparallel diode pair is disposed at the tail end of the frequency-mixing microstrip chip, and the local-oscillator low-pass filter and the intermediate-frequency low-pass filter are arranged on the end face of the tail end of the radio-frequency waveguide, determine the length of the frequency-mixing microstrip chip disposed in the radio-frequency waveguide according to local oscillator signals and determine the width of a grounding end of the frequency-mixing microstrip chip according to the size of the antiparallel diode pair. The millimeter-wave even harmonic mixer structure has the advantages that radio-frequency signals can be well coupled to diodes, and when radio-frequency signals and the local oscillator signals are subjected to frequency mixing, the millimeter-wave even harmonic mixer structure is excellent in frequency conversion performance, high in consistency and broader in operation bandwidth.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a millimeter-wave even-order harmonic mixer structure. Background technique [0002] As an important part of systems such as millimeter wave radar, guidance, communication and test instruments, the performance of the millimeter wave mixer determines the performance of the millimeter wave system to a certain extent. Therefore, millimeter-wave mixers have always been an important topic in millimeter-wave research. Although solid-state microwave devices have developed rapidly in recent years, for millimeter waves, as the frequency increases, the cost of the corresponding devices and systems also increases. At a certain mmWave frequency, the cost of generating a high-power mmWave signal at the corresponding frequency will also rise rapidly. Therefore, in order to reduce the cost as much as possible under the condition of meeting the application requirements of the ...

AI Technical Summary

Problems solved by technology

[0005] The existing millimeter-wave even-order harmonic mixer has the following disadvantages technically: the waveguide to the microstrip probe is excessively complicated in structure

In terms of probe design, because the DC loop path will seriously affect the signal transmission path, it will complicate the probe design; and because the microstrip probe is only placed at about a quarter wavelength from the end of the waveguide, the The field will stir up two discontinuous points, which will also bring certain difficulties to the size design of the microstrip substrate and the determination of the placement position.

[0006] To sum up, the existing technology has high requirements for the design of the waveguide to the microstrip probe and the determination of the position of the short-circuit surface of the waveguide; and to a certain extent, the assembly process will affect the mixing performance and consistency. high, the effect will be more significant

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