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Title:
CIRCULARLY POLARIZED WAVE SLOT ANTENNA
Document Type and Number:
Japanese Patent JPH01101705
Kind Code:
A
Abstract:

PURPOSE: To obtain an ideal circularly polarized wave slot antenna, which is nearly a complete roundness, by specifying the inclination of a slot to be arranged in a double helix shape.

CONSTITUTION: To a slot board 5 of the conductor of the one side of a radial waveguide path, to which a feeding is executed by a coaxial line 14, a number of the slots are provided. Then, the slots are successively arranged so that the polar coordinates (R, θ) of the center of an odd numbered slot, which keeps a constant angle with the radial direction of the waveguide path, satisfies the equation R=b+λθ/2, where λ is the wavelength of an axisymmetric propagating mode in the radial waveguide path and (b) is an arbitrary length, and the equation R=λ/2+b+lθ/2 is satisfied by an even numbered slot. Thus, even when an intermediate metallic board is not used, a complete roundness polarized slot antenna can be obtained providing a gain of high performance.


Inventors:
OKAZAKI YASUHIRO
KIKUCHI SHIGEO
MISUMI KATSUMI
Application Number:
JP25921087A
Publication Date:
April 19, 1989
Filing Date:
October 14, 1987
Export Citation:
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Assignee:
TOPPAN PRINTING CO LTD
International Classes:
H01Q21/06; H01Q13/10; H01Q13/22; H01Q21/24; (IPC1-7): H01Q21/06; H01Q21/24



 
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