Micro-wave milimeter substrate integrated wave-guide filter antenna

Abstract

The invention discloses a substrate-integrated waveguide filter antenna applied to microwave and millimeter wave circuits, which includes a dielectric substrate with metal patches on both sides, at least two resonant cavities are arranged on the dielectric substrate, A substrate-integrated waveguide inductive window is provided on the common side walls of the two resonant cavities, a waveguide is provided on one side of the resonant cavity and one end of the waveguide is connected to the resonant cavity, and the side wall of the resonant cavity between the waveguide and the resonant cavity There is also a substrate-integrated waveguide inductive window on the dielectric substrate. An input terminal is provided on the dielectric substrate and the input terminal is connected to the other end of the waveguide. The above-mentioned resonant cavity is surrounded by metal through holes, and the waveguide consists of at least 2 rows of metal through holes. Composition, a radiation slot is provided on the metal patch and in the inner area of ​​the resonant cavity. The invention has simple structure, easy design, low cost, good frequency selectivity, can improve the performance of the system transmitter, and can suppress the interference of space clutter.

Description

technical field [0001] The invention relates to a substrate integrated antenna applied to microwave and millimeter wave circuits, in particular to a microwave and millimeter wave substrate integrated waveguide filter antenna. Background technique [0002] Microwave and millimeter wave antennas are an important part of contemporary communication systems. With the rapid development of modern communication systems, there is an urgent need for microwave and millimeter wave antennas with small size, low cost, easy integration and high performance. In the communication system, due to the nonlinear characteristics of active devices, such as power amplifiers, mixers, etc., a large number of clutter signals will be generated outside the working frequency band, which will deteriorate the system performance on the one hand and interfere with other systems on the other hand. . Therefore, high requirements are placed on the linearity of nonlinear devices, such as amplifiers, and the fr...

AI Technical Summary

Problems solved by technology

Although the commonly used antenna has certain frequency selection characteristics, its frequency selectivity is very poor, and its standing wave performance is far from being compared with the frequency selection characteristics of the filter. An antenna with good frequency filtering characteristics is required to suppress out-of-band clutter and interference, thereby reducing the requirements for design indicators of other devices in the system and reducing the cost of system implementation

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