Three-frequency polarization reconfigurable single-feed patch antenna

A single-fed patch and antenna technology, applied in the field of three-frequency polarization reconfigurable single-fed patch antenna, can solve the problem of relatively few three-frequency research, achieve polarization reconfigurable, and avoid complex circuits , the effect of reducing the processing complexity
CN110797648APending Publication Date: 2020-02-14SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2020-02-14

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Abstract

The invention discloses a three-frequency polarization reconfigurable single-feed patch antenna which comprises a first dielectric substrate, a second dielectric substrate, an input port, PIN diodes,inductors, capacitors and voltage modules. The first dielectric substrate is located above the second dielectric substrate, and an air layer is formed between the two dielectric substrates. A rectangular radiation patch is arranged on the top surface of the first dielectric substrate. Open-circuit stub lines are loaded on three sides of the rectangular radiation patch, and the open-circuit stub lines are connected with the rectangular radiation patch through the PIN diodes. Three slots parallel to the adjacent sides are formed in the rectangular radiation patch, and one PIN diode is connectedto the center of each slot in a bridging manner. A floor with a slot is arranged on the top surface of the second dielectric substrate, a micro-strip feeder line of the input port is arranged on the bottom surface, and the micro-strip feeder line of the input port excites the rectangular radiation patch through the slot in the floor. According to the invention, polarization characteristic switching can be realized in three frequency bands, and the antenna has the advantages of flexible design, low profile, low axial ratio, low cost and the like.
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Description

technical field

[0001] The invention relates to the technical field of antennas, in particular to a three-frequency polarization reconfigurable single-feed patch antenna. Background technique

[0002] Reconfigurable antennas have attracted people's attention because of their versatility, and polarization reconfigurable antennas have attracted much attention due to their advantages of reducing fading loss, improving system capacity, and suppressing channel interference. In places with dense buildings, there will be a large number of multipath reflections. Circularly polarized antennas can effectively combat Faraday rotation effects and multipath fading, and improve signal quality. In rural areas or open roads where multipath reflection is not significant, the polarization is mainly concentrated in the vertical direction. In order to make the same system meet multiple communication standards at the same time and be able to switch polarization states according to application n...

Claims

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