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Patent Searching and Data


Title:
ANTENNA SHARER
Document Type and Number:
WIPO Patent Application WO/2003/026157
Kind Code:
A1
Abstract:
An antenna sharer uses a dielectric filter (11) at a transmission side and a SAW filter (12) at a reception side. Interference of the reception side filter to the transmission side filter due to use of different types of filters is adjusted by a phase adjuster (16). This minimizes power loss of a transmission signal and lowering of reception sensitivity. That is, the transmission power loss is reduced by phase adjustment by the phase adjuster (16) and lowering of the reception sensitivity is reduced by using only the SAW filter at the reception side.

Inventors:
Shimada, Hajime (1-18-17, Koyamadai Shinagawa-ku, Tokyo, 142-0061, JP)
Application Number:
PCT/JP2002/006117
Publication Date:
March 27, 2003
Filing Date:
June 19, 2002
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-shi, Osaka, 571-0050, JP)
Shimada, Hajime (1-18-17, Koyamadai Shinagawa-ku, Tokyo, 142-0061, JP)
International Classes:
H01P1/213; H04B1/50; H04B1/52; (IPC1-7): H04B1/50
Foreign References:
JPH05175879A
JPH06350307A
JPH08237165A
JPH08237166A
JP2000013278A
Attorney, Agent or Firm:
Oguri, Shohei (Eikoh Patent Office 28th Floor, ARK Mori Building 12-32 Akasaka 1-chome Minato-ku, Tokyo, 107-6028, JP)
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