Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2005-02-08
2005-02-08
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S768000, C343S769000
Reexamination Certificate
active
06853344
ABSTRACT:
In an RLS antenna, the present invention allows adjusting the optimum positional relationship between the feeder section of the feeder disk and the feeder section of the antenna disk, simply, quickly and at high accuracy by a visual check, so that mass production becomes possible, and an increase in performance and a decrease in cost are implemented. When the diameter of the antenna disk is D and the wavelength of the central frequency is λ, a marker of about 0.10λ or less is disposed in an area of 0.5 (D−4λ)−0.5D distant from the center. A through hole with a size (opening area) through which the marker can be viewed is disposed at a position the same as the position of the marker on the feeder disk. By visually confirming that the marker is positioned at the center of the through hole, the antenna disk is positioned and secured on the feeder disk.
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“Measurements of planar feed circuits for a radial line slot antenna”. A. Akiyama et al., Proceedings of the 2000 IEICE General Conference, B-1-125, Mar. 2000.
“A Feeding Circuit for Concentric Arrays of Radial Line Slot Antenna”, M. Ishii et al., Proceedings of the 2000 IEICE General Conference, B-1-128, Mar. 2000.
“A Rectangular-to-Radial Waveguide Transformer thorugh a Ring Slot for Excitation of a Rotating Mode”, K. Sudo et al., Proceedings of the 2000 IEICE General Conference, B-1-126, Mar. 2000.
“Design of a Millimeter-wave Radial Line Slot Antenna Fed by a rectangular Waveguide through a Ring Slot”, K. Sudo et al., Proceedings of the 2000 Communications Society Conference of IEICE, B-1-62, Sep. 2000.
Ho Tan
Oki Electric Industry Co. Ltd.
Rabin & Berdo P.C.
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