Broadband miniaturization double-rotating circularly polarized antenna

Abstract

The invention discloses a double-rotating circularly polarized antenna which can meet with the using requirements of broadband miniaturization communication equipment, comprising an upper-layer radiation paster 1, a lower-layer radiation paster 2, a floor 3 with coupling gaps, a feed network 4, a dielectric substrate 5, a medium screw 6 and a base 7, wherein the upper-layer radiation paster 1 adopts medium coupled feeding; the lower-layer radiation paster 2 adopts floor 3 coupled feeding with the coupling gaps; the dielectric substrate 5 is used for supporting the gap between the upper-layer radiation paster 1 and the lower-layer radiation paster 2 as well as the gap between the lower-layer radiation paster 2 and the floor 3; and the feed network 4 is located below the floor 3 and adopts a strip line form. Double-tuning characteristic is formed by medium coupled feeding so as to further broaden the antenna impedance bandwidth and axial ratio bandwidth; and caliber utilization is improved in a limited space. Simultaneously, the bandwidth of the antenna is effectively broadened and the structural size of the antenna is reduced through H-shaped gap medium coupled feeding.

Description

Technical field [0001] The present invention belongs to the technical field of antennas, and particularly relates to an antenna that meets the use requirements of a wideband and miniaturized communication device. Background technique [0002] Miniaturized broadband antennas are required to achieve broadband operation of the antenna within a smaller limited aperture. The miniaturized broadband antenna effectively improves the aperture efficiency of the antenna, broadens the impedance bandwidth and axial ratio bandwidth of the antenna, and has been widely used in satellite communications, navigation, and data transmission. [0003] In the field of satellite communications, with the development of antenna pan-satellite technology, antennas are required to work in a wide frequency band or even in multiple frequency bands. At the same time, within a limited aperture, the size and weight of the antenna are usually more stringent. Microstrip antennas have the advantages of low profile, s...

AI Technical Summary

Problems solved by technology

This kind of antenna does not belong to the microstrip antenna, and the antenna is relatively large in size. Generally speaking, the diameter of the cavity is three-quarters of the wavelength, and the depth of the cavity is one-quarter of the wavelength. In this way, if the antenna used in the GPS navigation frequency band has a diameter of About 170mm

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