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Patent Searching and Data


Title:
MICRO-STRIP ANTENNA
Document Type and Number:
WIPO Patent Application WO/2015/004992
Kind Code:
A1
Abstract:
Provided is a micro-strip antenna which is more compact than the prior art and has an excellent axial ratio in the required frequency band. A Wilkinson coupler unit (24) comprises two π-filters (24a, 24b) and a resistor (24c), and is a circuit that divides an input signal from an input terminal (26) into two parts. The π-filters (24a, 24b) are connected to each other in parallel, and the resistor (24c) is connected between the output terminals of the π-filters (24a, 24b). The cutoff frequency of the π-filters (24a, 24b) is set at a frequency (approximately 1590 MHz) which is in the center of the Global Navigation Satellite Systems (GNSS) frequency band. A phase-shift unit (25) is connected to one output terminal of the Wilkinson coupler unit (24). The phase-shift unit (25) is a π-filter, and the cutoff frequency thereof is set at a frequency (approximately 1590 MHz) which is in the center of the Global Navigation Satellite Systems (GNSS) frequency band.

Inventors:
SAMPO, Takeshi (TOMIOKA PLANT, 1112, Kanohara, Tomioka-Sh, Gunma 95, 〒3702495, JP)
KOWAITA, Kazuhiro (TOMIOKA PLANT, 1112, Kanohara, Tomioka-Sh, Gunma 95, 〒3702495, JP)
Application Number:
JP2014/063031
Publication Date:
January 15, 2015
Filing Date:
May 16, 2014
Export Citation:
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Assignee:
YOKOWO CO., LTD. (5-11, Takinogawa 7-Chome Kita-K, Tokyo 15, 〒1148515, JP)
International Classes:
H01Q13/08; H01Q21/24; H03H7/48
Foreign References:
JP2004056204A2004-02-19
JP2006311300A2006-11-09
JPS6243906A1987-02-25
JP2004215245A2004-07-29
JP2006237904A2006-09-07
Attorney, Agent or Firm:
MURAI, Takashi et al. (Syuwa 2nd Nanpeidai Residence 1102, 12-13 Nanpeidai-cho, Shibuya-k, Tokyo 36, 〒1500036, JP)
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