Broadband circular-polarized microstrip antenna

Abstract

The invention discloses a broadband circular-polarized microstrip antenna and relates to the technical field of antennas. The broadband circular-polarized microstrip antenna comprises first and second radiation units, first and second H-shaped grooves, first and second feeding units, a 90-degree phase-shift power-division network, a load, a grounding through hole, a welding pad, first, second and third dielectric substrates, and an air dielectric layer, wherein the first and second radiation units are respectively attached to the upper surfaces of the first and second dielectric substrates, the air dielectric layer is arranged between the first and second dielectric substrates which are support by gaskets, a ground layer is attached between the second and third dielectric substrates, the first and second feeding units are attached to the lower surface of the third dielectric substrate, the first and second H-shaped grooves are arranged in the ground layer, the input port of the 90-degree phase-shift power-division network is an antenna port, the output port of the 90-degree phase-shift power-division network is respectively connected with the first and second feeding units and the load, the load is connected with the ground layer via the welding pad and the grounding through hole, and the 90-degree phase-shift power-division network divides one path of signals into two paths of signals with equal amplitude and 90-degree phase difference.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a broadband circularly polarized microstrip antenna. Background technique [0002] In recent years, with the rapid development of mobile communication, wireless mobile communication has also been widely used. The antenna is an important part of the wireless mobile communication system, responsible for sending and receiving wireless signals. Among many types of antennas, microstrip antennas are favored by the market and widely used due to their small size, light weight, planar structure, easy integration with IC devices, easy batch processing, and low cost. However, the shortcoming of the narrow working bandwidth (<5%) of the microstrip antenna also greatly limits the application of the microstrip antenna. Circularly polarized antennas are widely used in radar, military, satellite communication and mobile communication systems. Compared with linearly polarized waves, circul...

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Problems solved by technology

[0003] In recent years, with the advent of the era of high-speed data communication, broadband wireless communication has developed rapidly. Broadband wireless communication requires a relatively wide operating bandwidth, but the shortcoming of the narrow operating bandwidth of the microstrip antenna limits its application in the rapidly developing field of broadband wireless communication. application

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