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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2008/066128
Kind Code:
In order to provide a wireless communication apparatus that reduces noise and maintains its receiving sensitivity, a stub (5) with a base end (51) electrically connected with a ground- coupling portion (7) adjacent to an RF circuit (4) and with a tip end (52) opened is formed on a surface layer (10S) of a circuit board (1). Further, the stub (5) is formed by a 1/4λ electrical length ground pattern (5) made of a part of a ground (10) of the circuit board (1) in a peninsular shape. A connection from the RF circuit (4) to a chip antenna (3) and a connection from the base edge (51) of the 1/4λ electrical length ground pattern (5) to the ground coupling portion (7) are wired at minimized distances. In addition, a plurality of 1/4λ electrical length ground patterns that resonate with different wavelength are provided as the stub (5) and their base edges are connected with the ground coupling portion (7) at minimized distances.

NAMBA, Akira (Yokohama office 2-1-1, Kagahara, Tsuzuki-ku, Yokohama-sh, Kanagawa 02, 2248502, JP)
Application Number:
Publication Date:
June 05, 2008
Filing Date:
November 29, 2007
Export Citation:
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KYOCERA CORPORATION (6 Takedatobadono-cho, Fushimi-ku Kyoto-sh, Kyoto 01, 6128501, JP)
京セラ株式会社 (〒01 京都府京都市伏見区竹田鳥羽殿町6番地 Kyoto, 6128501, JP)
International Classes:
H04B15/02; H04B1/10
Foreign References:
Attorney, Agent or Firm:
SHIGA, Masatake (2-3-1, Yaesu Chuo-k, Tokyo 53, 1048453, JP)
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