W-waveband dual polarized slot antenna working in TM210 resonant mode and feed network

Abstract

The invention discloses a W-waveband dual polarized slot antenna working in a TM210 resonant mode and a feed network. A radiating part and a feed part are respectively composed of a radiation chamberand a substrate integrated waveguide. Characteristics of high Q-value and low loss of a metal radiating chamber and characteristics of easy machining and easy integration are combined. A metal chamberis used as a radiator which has high radiation efficiency and improves integral efficiency of the antenna. The substrate integrated waveguide is used as a feed structure and has advantages of easy machining, relatively simple realization of a multilayer structure, and can remarkably reduce cost when compared with a metal waveguide slot feed network. The upper surface of the metal radiator is provided with four independent radiating channels, and the lower surface is provided with a resonant chamber for coupling signals of a horizontal polarized feed structure and a vertical polarized feed structure into four independent channels, thereby realizing one-to-four same-phase feeding from a single coupling slot to four radiating channels, simplifying the feed structure and reducing complexity of the feed network.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave radar, and in particular relates to a 210 Resonant mode W-band dual-polarized slot antenna and feed network. Background technique [0002] With the development of dual-polarized antenna theory and technology, as well as the improvement of machining accuracy and multi-layer microwave circuit manufacturing technology, it is possible to realize high-gain dual-polarized antennas by sharing the same radiation port in the millimeter wave and even higher frequency bands. , the dual-polarized antenna based on the same radiation interface has the advantages of coincidence of two polarization phase centers, high utilization rate of the interface, easy realization of low profile and miniaturization, and easy integration with the transceiver channel, which is easy to meet the requirements of the terminal guidance radar system. Functional requirements for dual polarized antennas. [0003] In the W-ba...

AI Technical Summary

Problems solved by technology

[0006] Summarizing the current status of technological development, it can be found that the structure of the dual-polarized waveguide antenna is relatively complex, with high requirements for processing accuracy and low yield, which cannot meet the requirements of low cost and low weight of the radar system, and the traditional dual-polarized waveguide slot antenna narrow bandwidth

Multilayer dual-polarized microstrip antennas have the advantages of low profile and low cost, but their efficiency is low, and the loss of microstrip lines and striplines in the W-band is large, making it difficult to achieve high antenna gain

The multilayer antenna based on SIW feed has the characteristics of low loss of waveguide structure and easy processing of planar circuit, but when designing a larger array, it needs to use more layers to realize a complex feed network, multilayer circuit board The processing cost and alignment accuracy between layers cannot be ignored, which is contrary to the inherent low cost and easy processing characteristics of SIW

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