Dual-frequency dual-circularly-polarized microstrip antenna

Abstract

The invention relates to the technical field of microstrip antennas, and discloses a dual-frequency dual-circularly-polarized microstrip antenna, which comprises a dielectric substrate, a radiation patch, a feeding point, a metal floor, a first resonator and a second resonator, and is characterized in that the radiation patch and the metal floor are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the radiation patch is a rectangular patch; the feeding point is located on the diagonal line of the radiation patch, the first resonator and the second resonator are located outside the radiation patch and located on the two adjacent sides of the radiation patch respectively, the center of the first resonator and the center of the radiation patch are located on the same straight line, and the center of the second resonator and the center of the radiation patch are located on the same straight line. The resonant frequencies of the first resonator and the second resonator are not equal, the resonant frequencies of the first resonator, the second resonator and the radiation patch are similar, the antenna can work in two frequency bands and is dual-circularly polarized, the antenna has the advantages of a low profile, low cost, simple manufacturing and the like, the isolation degree of the two frequency bands is high, and an impedance characteristic is small.

Description

technical field [0001] The invention relates to the technical field of microstrip antennas, in particular to a dual-frequency dual circularly polarized microstrip antenna. Background technique [0002] With the rapid development of wireless communication systems, in order to meet better communication quality and higher communication capacity, circular polarization and dual-frequency or multi-frequency technology has become a research hotspot in the field of antennas in recent years, and circular polarization and multi-frequency The combination of technology has also become a research and design trend. An advantage of the microstrip antenna is that it is easy to obtain circular polarization, and it is easy to realize dual frequency bands and dual polarization. Although the most commonly used wireless communication polarization method is still linear polarization, the advantages of circularly polarized waves such as anti-interference, anti-rain and fog, and anti-attenuation m...

AI Technical Summary

Problems solved by technology

The patent adopts the upper radiation patch, the upper dielectric, the upper ground layer, the lower radiation patch, the lower dielectric and the lower ground layer from top to bottom to form the upper antenna and the lower antenna. , the gap between the media will significantly change the input impedance characteristics of the antenna, especially at high frequencies, the impedance characteristics of the gap are large, and the requirements for the bonding material between the stacks are high. If the bonding material is lossy and located next to a narrow slot, it will reduce the efficiency of the antenna

Images