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Broad-band circularly polarized antenna integrated on plane

A circularly polarized antenna and broadband technology, which is applied in the field of planar integrated broadband circularly polarized antennas, can solve the problems of losing the superiority of planar integration, complex structure, reduced efficiency, etc., and is convenient for conformal installation and array applications. The effect of improving radiation performance and frequency bandwidth

Inactive Publication Date: 2003-09-10
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

The first type is represented by the structure of multi-layer patch and multi-layer orthogonal phase coupling feed, which not only has a complex structure, but also restricts the frequency bandwidth and efficiency
The second type is represented by the spiral radiator structure with natural circular polarization performance, but on the one hand, in order to achieve unidirectional radiation, or add a metal back cavity to seriously inhibit its inherent broadband characteristics, or fill the absorption material obviously Reduce efficiency; on the other hand, the Balun, which must be added to the coaxial cable feed, is perpendicular to the antenna plane, which is inconvenient for conformal installation and loses the advantages of plane integration.

Method used

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  • Broad-band circularly polarized antenna integrated on plane
  • Broad-band circularly polarized antenna integrated on plane
  • Broad-band circularly polarized antenna integrated on plane

Examples

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Embodiment approach

[0013] The radiator 11 is formed by printing an equiangular spiral or an Archimedes spiral on the radiator substrate 1 . Example: Substrate material ε r =2.65, thickness 1mm; the standard designed equiangular spiral works at (2~16)GHz.

[0014] The PBG dielectric substrate 2 adopts square or triangular round holes or square holes arranged periodically. Example: Substrate material ε r =10.2, the thickness is 3.27mm; the periodic side length of the triangle is 6.35mm; the hole diameter is 3.8mm, and the number of holes is 26×26.

[0015] The conversion system of coplanar stripline (CPS)-coplanar waveguide (CPW)-coaxial line or microstrip line-microstrip line-coaxial line is adopted on the feeder network substrate 3, and the hybrid bridge can also be selected from a variety of Structure type. Example: Substrate parameters are the same as substrate 1, CPS-CPW-coaxial system, standard three-half wavelength CPW hybrid ring, after synthesis, CPW step impedance transformer is adde...

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Abstract

A plane integrated broadband circularly polarized antenna for emitting or receiving RF signals is composed of a medium substrate as main body and the radiator substrate and feed line network substrate, which are stuck to both sides of main body. Said radiator substrate has symmetrically spiral radiator. Said medium substrate is a photon band-gap one with periodical holes structure. Said feed line network is a balance-unbalance one in coplanar microstrip line-coplanar waveguide-coaxial cable type and is printed on its substrate.

Description

Technical field: [0001] The invention relates to an antenna for transmitting or receiving radio frequency signals, in particular to a planar integrated broadband circularly polarized antenna. Background technique: [0002] In order to obtain circularly polarized radiation characteristics, there are mainly two types of planar integrated structures: microstrip patch antennas and printed linear antennas. The first type is represented by multi-layer patch and multi-layer quadrature phase coupling feeding structure, which not only has a complex structure, but also restricts the frequency bandwidth and efficiency. The second type is represented by the spiral radiator structure with natural circular polarization performance, but on the one hand, in order to achieve unidirectional radiation, or add a metal back cavity to seriously inhibit its inherent broadband characteristics, or fill the absorption material obviously Reduce efficiency; on the other hand, the Balun, which must be ...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q13/00
Inventor 章文勋刘庭华
Owner SOUTHEAST UNIV
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