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Title:
WIDE ANGLE CIRCULARLY POLARIZED WAVE ANTENNA
Document Type and Number:
Japanese Patent JP3720581
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain the sensitivity of a horizontally polarized wave component of a circularly polarized wave at a low elevation angel by arranging plural planar radiating elements under the ground conductor plate of a microstrip planar antenna (MSA) and electrically connecting them to the ground conductor plate.
SOLUTION: In an MSA1, a circular patch-shaped radiating element 1b is attached to a circular dielectric substrate 1c. A ground conductor plate 1d is supported by a dielectric cylinder 4, with almost the same diameter and four pieces of planar radiating elements 3, are attached to all around the cylinder 4 with intervals respectively. The plane where the elements 3 are distributed and arranged exists on the circumference with almost the same diameter as the MSA 1. The plate 1d and each element 3 are electrically connected with a wire 2. The plate 1d is a common ground conductor for the MSA 1 and the elements 3. The sensitivity of a horizontally polarized wave component at the low elevation angle of the MSA 1 is improved by the operation of high frequency current which flows along the lateral direction of the elements 3 and the sensitivity of a vertically polarized wave component is improved by the operation of high frequency current flowing along the vertical direction.


Inventors:
Akihiro Katsuro
Hideto Ohkita
Takahito Morishima
Application Number:
JP16794398A
Publication Date:
November 30, 2005
Filing Date:
June 16, 1998
Export Citation:
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Assignee:
Kyocera Corporation
International Classes:
H01Q17/00; H01Q1/24; H01Q1/28; H01Q1/38; H01Q9/04; H01Q13/08; H01Q21/20; H01Q21/24; H01Q21/29; H01Q21/30; (IPC1-7): H01Q21/29; H01Q1/24; H01Q13/08; H01Q17/00; H01Q21/20; H01Q21/24
Domestic Patent References:
JP10041740A
JP7183719A
JP5014032A