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A cpw-fed broadband circularly polarized antenna

A circularly polarized antenna, antenna technology, applied in the field of communication, can solve problems such as narrower than bandwidth

Inactive Publication Date: 2016-04-20
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the 3dB axial ratio bandwidth of these antennas is narrow and less than 3%

Method used

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  • A cpw-fed broadband circularly polarized antenna
  • A cpw-fed broadband circularly polarized antenna
  • A cpw-fed broadband circularly polarized antenna

Examples

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, the present invention is a CPW feed broadband circularly polarized antenna. The antenna includes a dielectric substrate, an elliptical slot, and a coplanar integrated waveguide feeder. The elliptical slot is arranged on the dielectric substrate. The common The surface integrated waveguide feeder is in the elliptical groove, wherein the elliptical groove has two mutually symmetrical structures.

[0026] It should be noted that the two elliptical slots are partially overlapped, and the included angle between the line connecting the centers of the two elliptical slots and the coplanar integrated waveguide feeder is 45 degrees.

[0027] It should be noted that the dielectric substrate has a relative permittivity of 4.4 and a height of 1.6 mm.

[0028] It should be noted that the major axis radius of the elliptical groove is 12 mm.

[00...

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PUM

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Abstract

The invention discloses a CPW (Co-Planar Waveguide) feeding broadband circular polarization antenna. The antenna comprises a dielectric substrate, elliptic grooves and a coplanar integrated waveguide feeder; the elliptic grooves are formed on the dielectric substrate; and the coplanar integrated waveguide feeder is arranged in the elliptic grooves, wherein the two elliptic grooves are of a symmetrical structure. The CPW feeding broadband circular polarization antenna has an actually measured impedance bandwidth of about 5.4GHz (which is 112.5 percent relative to a center frequency) and has a 3dB axial ratio bandwidth of 5.5GHz (which is 109 percent relative to the center frequency); and the impedance and axial ratio bandwidth of the CPW feeding broadband circular polarization antenna are greater than those of a currently disclosed single-feeding circular polarization microstrip slot antenna. Moreover, the CPW feeding broadband circular polarization antenna has the bidirectional radiation characteristic and respectively radiates right-hand circular polarized waves and left-hand circular polarized waves in the +z and -z directions.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a wide-slot circularly polarized antenna design in wireless communication. Background technique [0002] The application of circular polarization (CP) antennas in wireless communication has always attracted great attention. Many literatures have been published on the design of single-feed circularly polarized antennas for microstrip antennas. However, the 3dB axial ratio bandwidth of these antennas is narrow and less than 3%. Microstrip slot antennas have overcome this shortcoming, because they not only have the same low-profile advantages as microstrip patch antennas, but also have wider impedance bandwidth and 3dB axial ratio bandwidth. Circularly polarized microstrip slot antennas can be divided into two types according to their structure: circular slot circularly polarized antenna (RSCPA) and wide slot circularly polarized antenna (WSCPA). According to published lite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q9/04
Inventor 杨林栗曦
Owner XIDIAN UNIV
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