New concept broadband circularly polarized antenna

Abstract

The invention discloses a new concept broadband circularly polarized antenna. The new concept broadband circularly polarized antenna adopts the structure that a feed line is connected with an antenna radiation unit; the antenna radiation unit is etched on a dielectric baseplate; the dielectric baseplate is horizontally fixed above a reflecting plate through a supporting structure; the antenna radiation unit comprises two bending oscillators, two parasitic units, a coplanar microstrip line and a T-shaped microstrip line feed structure; the bending oscillators, the parasitic units and the coplanar microstrip line are etched on the reverse side of the dielectric baseplate; the T-shaped microstrip line feed structure is etched on the obverse side of the dielectric baseplate; the two bending oscillators are centrosymmetric about the dielectric baseplate; the coplanar microstrip line is arranged at a medial axis of the dielectric baseplate; the coplanar microstrip line comprises two wide-gap coplanar microstrip line bodies and two narrow-gap microstrip line bodies; the wide-gap coplanar microstrip line bodies feed the bending oscillators respectively to stimulate circularly polarized waves through the non-center-fed bending oscillators; besides, the broadband circularly polarized antenna adopts a novel and simple full-plane structure, and is convenient to process and form.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a new concept broadband circularly polarized antenna. Background technique [0002] The application of circularly polarized antennas in wireless communication systems has attracted more and more attention, because circularly polarized antennas can not only reduce multipath effects but also receive incoming waves with arbitrary polarization, and directional circularly polarized antennas can provide both High security, while improving channel utilization. In addition, if the antenna radiates left-handed circularly polarized waves, it will only receive left-handed circularly polarized waves but not right-handed circularly polarized waves; The rotation orthogonality of circularly polarized antennas can be used to improve communication capacity in polarization diversity work. When the circularly polarized wave is incident on a symmetrical target (such as a plane, a spherical surf...

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Problems solved by technology

However, this method has a complex structure, a large volume, and high manufacturing process requirements.

There is also an L-type probe coupling feed, but this method generally requires an external matching circuit, and is generally a double-feed form, with a complex structure and high production costs.

[0005] On the whole, it is difficult for the existing wideband circularly polarized antenna technology to achieve better performance in the three aspects of fixed bandwidth and full plane.

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