Small high-isolation and wide-band antenna adopting differential feed and multilayer patch structures

Abstract

The invention discloses a small high-isolation and wide-band antenna adopting differential feed and multilayer patch structures. The antenna comprises a pair of multilayer patch antennae which have the same structure and are orthogonally arranged back to back, wherein each multilayer patch antenna consists of three layers of medium plates and four layers of circuits. The antenna is applied to mobile communication. The differential feed structure well prevents the problem of cross polarization of an ordinary antenna, orthogonal arrangement further acquires higher isolation, and meanwhile, due to the adoption of the multilayer patch structure, two similar resonant frequencies are generated, and relatively large working band width is realized. The antenna is small in cross polarization, high in isolation and relatively large in band width, and the design conflict between antenna miniaturization and the wide frequency band, and between miniaturization and high isolation is well overcome. The antenna is applicable to mobile communication scenes, such as a compact repeater station and a small-power base station. The design is novel, creative and practical.

Description

technical field [0001] The invention relates to an antenna in the field of wireless mobile communication, in particular to a miniaturized high-isolation wide-band antenna based on differential feeding and a multi-layer patch structure. Background technique [0002] The antenna is an energy conversion device for receiving and sending electromagnetic waves in a wireless communication system, and is an indispensable part of a wireless mobile communication system. With the development of wireless mobile communication technology, the requirements for antennas are getting higher and higher. The research on antennas is developing in the direction of multi-band, multi-polarization, wide-band, high isolation, and miniaturization. Among them, the working bandwidth and isolation are important indicators to measure the working performance of the antenna. [0003] For microstrip patch antennas, the common methods and techniques for expanding the working bandwidth include ...

AI Technical Summary

Problems solved by technology

The problem with the design is that if you want to get a higher isolation, you need to have a larger distance between the two antennas, and if you want to get a wider frequency band, you need to have a larger height between the radiation patch and the metal floor , which will increase the size of the antenna

Moreover, the general design scheme cannot well solve the contradictions between miniaturization and broadband as well as miniaturization and high isolation at the same time. The design scheme that can solve the above contradictions has a large antenna volume.

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