Patent Number: 7,821,351

Title: Irreversible circuit element

Abstract: An irreversible circuit element is configured by including a magnetic substance, a plurality of central conductors L1 to L3, one ends of which are connected to different input/output ports, arranged on the magnetic substance so as to intersect each other while being insulated from each other, a first conductor P1 connected to the other ends of all the central conductors L1 to L3, a second conductor, a plurality of matching capacitors (each configured by C1 to C3) connecting the one end of the central conductors L1 to L3 and the second conductor and a variable matching mechanism V1, one end of which is connected or integrated with the second conductor, capable of changing reactance between the one end and the other end thereof.

Inventors: Furuta; Takayuki (Yokosuka, JP), Fukuda; Atsushi (Yokohama, JP), Okazaki; Hiroshi (Zushi, JP), Narahashi; Shoichi (Yokohama, JP)

Assignee: NTT DoCoMo, Inc.

International Classification: H01P 1/36 (20060101)

Expiration Date: 2018-10-26 0:00:00