A Broadband Low Profile Circularly Polarized Antenna Based on Asymmetric Dipole

A circularly polarized antenna and dipole technology, applied in the direction of antenna, resonant antenna, electrical short antenna, etc., to achieve the effect of low profile, flat in-band gain, and wide frequency band

Active Publication Date: 2021-05-04
XIDIAN UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to use asymmetric dipoles to realize broadband characteristics, and reduce the height of the antenna section by loading artificial magnetic conductor (AMC) structure, and realize a broadband low-profile circularly polarized antenna

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  • A Broadband Low Profile Circularly Polarized Antenna Based on Asymmetric Dipole
  • A Broadband Low Profile Circularly Polarized Antenna Based on Asymmetric Dipole
  • A Broadband Low Profile Circularly Polarized Antenna Based on Asymmetric Dipole

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Embodiment Construction

[0040] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for any limitation on the invention.

[0041] like figure 1Shown is a schematic structural diagram of the wide-band low-profile circularly polarized antenna based on the asymmetric dipole of the present invention. The antenna has a four-layer structure. The first layer of dielectric board 1 is a radiation structure with rotational symmetry printed on the upper layer of the dielectric board. It is mainly composed of four asymmetric dipoles, and each dipole includes an outer long arm 5 and an inner long arm 5. The short arm 6, the outer long arm 5 and the inner short arm 6 are connected through the balun grounding part; the second layer of dielectric board 2 is an artificial magnetic conductor (AMC) structure, speci...

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Abstract

The invention discloses a wide-band low-profile circularly polarized antenna based on an asymmetric dipole. The antenna has a four-layer structure, and the first layer is a radiation structure printed on an upper dielectric plate with rotational symmetry, including four Asymmetrical dipoles, each dipole includes an outer long arm and an inner short arm; the second layer is an artificial magnetic conductor structure, including two square metal patches of different sizes printed on the upper layer of the medium dielectric board; the second layer The third layer is the upper floor printed on the lower dielectric board and the feed network of the lower layer, including the second-order Wilkinson power divider and 90° broadband phase shifter; the fourth layer is four broadband bars printed on the vertical dielectric board It provides a balanced feed for the radiating structure, and at the same time realizes impedance matching in a wide frequency band. This antenna has the advantages of wide frequency range, low profile, simple structure, flat gain in the band, etc. It is suitable for wireless communication fields such as electronic countermeasures, radio frequency identification systems, wireless local area networks, and global positioning systems.

Description

technical field [0001] The invention relates to antenna design technology in the field of wireless communication, in particular to a wide-band low-profile circularly polarized antenna based on asymmetrical dipoles. Background technique [0002] Modern communication systems need to achieve stable communication in complex environments and conditions, which have high requirements for antenna stability and anti-interference. Due to the advantages of reducing multipath effects, improving polarization matching efficiency and counteracting Faraday rotation effects, circularly polarized antennas have received more attention in wireless communication fields such as electronic countermeasures, radio frequency identification systems, wireless local area networks, and global positioning systems. , the design of broadband circularly polarized antennas has become a research hotspot in the field of electromagnetics. In recent years, low-profile antennas have attracted the attention of ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q9/28H01Q9/04
CPCH01Q1/38H01Q1/48H01Q9/0428H01Q9/285
Inventor 胡伟李长江冯天喜刘学康钱龙胡志鹏
Owner XIDIAN UNIV
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