Title:
TWO-PORT ISOLATOR AND COMMUNICATION APPARATUS
Document Type and Number:
Japanese Patent JP3858852
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a two-port isolator for preventing the propagation of a double wave (2f) or a triple wave (3f) of a used frequency f, and to provide a communication apparatus.
SOLUTION: One end portion 21a of a first central electrode 21 is electrically connected to an input port P1, and the other end portion 21b is electrically connected an output port P2. One end portion 22a of a second central electrode 22 is electrically connected to the port P2, and the other end portion 22b is electrically connected to a ground. A parallel RC circuit consisting of a first matching capacitor 25 and a resistor 27 is electrically connected between the ports P1 and P2. A serial resonant circuit consisting of a second matching capacitor 26 and an inductor 28 is electrically connected between the port P2 and the ground. The serial resonant circuit consisting of the capacitor 26 and the inductor 28 forms a trap circuit, and its resonant frequency is set at a value between the double wave (2f) and the triple wave (3f) of the used frequency.
Inventors:
Takashi Hasegawa
Application Number:
JP2003176047A
Publication Date:
December 20, 2006
Filing Date:
June 20, 2003
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01P1/36; H01P1/365; (IPC1-7): H01P1/36; H01P1/365
Domestic Patent References:
| JP9232818A | ||||
| JP50122145A | ||||
| JP2001168605A |
Attorney, Agent or Firm:
Takeichi Morishita
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