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Patent Searching and Data


Title:
ANTENNA MULTICOUPLER
Document Type and Number:
Japanese Patent JPH08307187
Kind Code:
A
Abstract:

PURPOSE: To reduce number of circuit components and to make the size small by connecting a dual tuning circuit of a 1st filter and a dual tuning circuit of a 2nd filter in series between a common terminal and ground.

CONSTITUTION: A 1st filter 14 and a 2nd filter 15 are connected in series between a common terminal 11 and ground. Then the 1st filter 14 connects to a 1st terminal 12 and the 2nd filter 15 connects to the 2nd terminal 13. The 1st filter 14 forms a dual tuning circuit by coupling magnetically a 1st coil L1 and a 2nd coil L2. The 2nd filter 15 forms a dual tuning circuit by coupling magnetically a 3rd coil L3 and a 4th coil L4 and the tuning frequency of the 1st filter 14 is differentiated from the tuning frequency of the 2nd filter 15. Since the dual tuning circuits whose tuning frequency differs are connected in series in this way, it is not required to connect a parallel resonance circuit to the filters 14, 15 to provide an attenuation pole, and then the filters are configured by a few number of components.


Inventors:
KIMURA SATORU
KOGA AKIHIRO
Application Number:
JP12933895A
Publication Date:
November 22, 1996
Filing Date:
April 28, 1995
Export Citation:
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Assignee:
TOKO INC
International Classes:
H03H7/01; H03H7/38; H03H7/46; H04B1/48; (IPC1-7): H03H7/46; H03H7/01; H04B1/48
Attorney, Agent or Firm:
Yu Ota