Slot-coupled circularly-polarized micro-strip antenna

Abstract

The invention discloses a slot-coupled circularly-polarized micro-strip antenna. The slot-coupled circularly-polarized micro-strip antenna comprises a radiation paster layer medium plate, a feed network layer medium plate and a reflection aluminum plate which are arranged from up to down. The radiation paster layer medium plate is formed in such a manner that a radiation paster is applied to the side of an insulating medium plate. The feed network medium plate is formed in such a manner that a copper film layer is applied to the side of the insulating medium plate. Two coupled slots are formed in the copper film layer in an etching manner. A circularly-polarized feed network is applied to the other side of the insulating medium plate. The coupled slots are in a concave shape, the two concave-shaped coupled slots intersect on only one corner point, and the two coupled slots are perpendicular to each other and symmetrical. Both concave ports of the two concave-shaped coupled slots face the external part of the space commonly covered by the two concave-shaped coupled slots. The slot-coupled circularly-polarized micro-strip antenna is different from a conventional straight slot design, bent parts of the concave slots are capable of realizing tuning of an antenna standing wave curve, and the two concave slots are arranged in a perpendicular and symmetrical manner, so that two electromagnetic waves which are orthogonal in polarity and identical in amplitude are guaranteed to be excited.

Description

technical field [0001] The invention relates to a microstrip antenna in the fields of communication and measurement and control, in particular to a slot coupling circularly polarized microstrip antenna. Background technique [0002] An existing slot-coupled circularly polarized microstrip antenna includes a radiation patch layer dielectric board, a feed network layer dielectric board, and a reflective aluminum board arranged in sequence from top to bottom; the radiation patch layer dielectric board is placed on the insulating dielectric board One side of the board is coated with a copper thin film layer for radiating or receiving circularly polarized electromagnetic signals, and the copper thin film layer is called a radiation patch; the feeding network layer dielectric board is coated with a copper thin film layer on one side of the insulating dielectric board , two coupling grooves are etched on the copper film layer, and a circularly polarized feed network is laid on the ...

AI Technical Summary

Problems solved by technology

This kind of slot-coupled circularly polarized microstrip antenna needs to be loaded with isolation resistors to achieve a wider axial ratio bandwidth, which creates two problems: on the one hand, the isolation resistors need to be manually soldered, and when the array scale is large, a huge workload is required , and it is difficult to ensure the consistency of unit welding; on the other hand, the isolation resistance will produce a certain difference loss, resulting in different degrees of decline in radiation gain

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