Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Reexamination Certificate
2007-10-02
2007-10-02
Mancuso, Huedung (Department: 2821)
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
Reexamination Certificate
active
10550885
ABSTRACT:
Folded dipole antenna elements (2, 4) are disposed generally in parallel, being spaced by a distance smaller than a half of the wavelength employed. The antenna elements (2, 4) are connected to a combiner (16) via feeders (12, 14) having different lengths. The difference in length between the feeders (12, 14) is such that received signals resulting from a radio wave coming to the antenna elements (2, 4) from the front and received by the antenna elements (12, 14) are in phase with each other at the inputs (16a, 16b) of the combiner (16), whereas received signals resulting from a radio wave coming to the antenna elements (2, 4) from the back and received by the antenna elements (12, 14) are 180° out of phase with each other at the inputs (16a, 16b) of the combiner (16).
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International Search Report from PCT/JP2004/004793 dated Jun. 15, 2004.
Fujisawa Shingo
Fujita Toshio
Shibuya Eiji
Shirosaka Toshiaki
Tatekawa Kiyotaka
Duane Morris LLP
DX Antenna Company Limited
Mancuso Huedung
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