Irreversible circuit element

Wave transmission lines and networks – Coupling networks – Nonreciprocal gyromagnetic type

Reexamination Certificate

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Details

C333S001100

Reexamination Certificate

active

07821351

ABSTRACT:
An irreversible circuit element is configured by including a magnetic substance, a plurality of central conductors L1to 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 P1connected to the other ends of all the central conductors L1to L3, a second conductor, a plurality of matching capacitors (each configured by C1to C3) connecting the one end of the central conductors L1to L3and 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.

REFERENCES:
patent: 3605040 (1971-09-01), Knerr et al.
patent: 2001/0028280 (2001-10-01), Maruhashi et al.
patent: 2002/0185659 (2002-12-01), Yamaguchi et al.
patent: 9-93003 (1997-04-01), None
patent: 4240780 (2009-01-01), None
patent: 1997-0008233 (1997-02-01), None
patent: 10-0216481 (1999-08-01), None
patent: WO 02/084783 (2002-10-01), None
Ichiro Ikushima, et al. “A Temperature-Stabilized Broad-Band Lumped-Element Circulator” IEEE Transactions on Microwave Theory and Techniques, vol. MTT-22, No. 12, Dec. 1974, pp. 1220-1225.
Hideto Horiguchi, et al. “Out-band Attenuation Enchancement and Bandwidth Enlargement in a Small Isolator” Hitachi Metals Technical Review, vol. 17, 2001, pp. 57-62 (with Partial English Translation).

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