Title:
ANTENNA MULTICOUPLER AND MOBILE COMMUNICATIONS EQUIPMENT USING THE SAME
Document Type and Number:
Japanese Patent JP3866989
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an antenna multicoupler, which can solve the problem of the loss in the conventional antenna multicoupler becoming larger, when a system using a frequency dividing method in which transmission and reception are made simultaneously and another system which does not make simultaneous transmission and reception exists in the multicoupler.
SOLUTION: This antenna multicoupler is provided with an antenna terminal 401, a transmission-side phase-shift circuit 403 and a reception-side phase-shift circuit 406 connected to the terminal 401, and a transmission filter 404 connected to the circuit 403 and a transmission terminal 405; the multicoupler is also provided with a reception filter 407, connected to the circuit 406 and a reception terminal 408; the transmission filter 404 is a composite filter, which is constituted to have an attenuation pole and to work as a multicoupler by respectively controlling the impedances of the phase shift circuits 403 and 406 by means of the circuits 403 and 406, when the multicoupler makes simultaneous transmission and reception; and when the multicoupler does not conduct simultaneous transmission and reception, attenuation pole is removed from the filter 404.
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Inventors:
Hiroyuki Nakamura
Toshio Ishizaki
Adachi Hisashi
Makoto Sakakura
Hiroaki Kosugi
Hiroyuki Itokawa
Toshiaki Nakamura
Toshio Ishizaki
Adachi Hisashi
Makoto Sakakura
Hiroaki Kosugi
Hiroyuki Itokawa
Toshiaki Nakamura
Application Number:
JP2002050108A
Publication Date:
January 10, 2007
Filing Date:
February 26, 2002
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01P1/213; H01P1/15; H01P1/203; H01P1/205; H03K17/00; H03K17/693; H03K17/76; H04B1/3822; H04B1/40; (IPC1-7): H01P1/213; H01P1/15; H01P1/203; H01P1/205; H03K17/00; H03K17/693; H03K17/76; H04B1/40
Domestic Patent References:
| JP2000332645A | ||||
| JP1200726A | ||||
| JP63120501A |
Foreign References:
| WO2001048935A1 |
Attorney, Agent or Firm:
Masamichi Matsuda