A wideband low-profile microstrip antenna with dual-mode operation suitable for microwave and millimeter wave bands

Abstract

The invention discloses a broadband low profile microstrip antenna suitable for dual mode operation in a microwave millimeter wave frequency band. The antenna is a rectangular patch loaded with a specific transverse slit and a longitudinal slit. The antenna is coupled and excited by a substrate integrated waveguide feeding slot. The antenna has advantages of simple structure, low profile, easy processing, wide bandwidth, low cross-polarization in a design frequency band and stable radiation pattern. Influence of an adhesion layer between an antenna dielectric layer and a feeding network can beconsidered in design by using a cavity model and a perturbation theory, to improve accuracy of calculating theoretical size of the antenna.

Description

technical field [0001] The invention relates to a dual-mode broadband low-profile microstrip antenna. The antenna is coupled and excited through a slot at the end of a substrate integrated waveguide (Substrate Integrated Waveguide, SIW), and belongs to the technical field of antennas. Background technique [0002] Antennas are an important part of wireless communication systems. With the rapid development of wireless communication, there is an urgent need for antennas with small size, low cost, high gain, easy integration and broadband. The traditional microstrip antenna has the advantages of low profile, low cost, small size, light weight, easy planarization, and easy integration, but it also has the disadvantage of narrow bandwidth. [0003] There are many techniques to improve the bandwidth of the microstrip antenna. By using feeding methods such as L-shaped probes and T-shaped feeders, the bandwidth of the microstrip antenna can be significantly improved, but it will b...

AI Technical Summary

Problems solved by technology

By using feeding methods such as L-shaped probes and T-shaped feeders, the bandwidth of the microstrip antenna can be significantly improved, but it will bring disadvantages such as increased complexity of the feeding method and increased antenna profile.

Stacked microstrip antennas, E-shaped antennas, and microstrip antennas loaded with U-shaped slots also have a relatively wide operating bandwidth, but there are also high cross-polarization, unstable radiation patterns, and higher structural complexity than traditional microstrip antennas. shortcoming

At the same time, many ways to improve bandwidth are in the millimeter wave frequency band. Due to complex structures, limited processing accuracy, and high processing costs, it is difficult to widely use them in engineering.

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