Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1997-03-13
1999-03-23
Ham, Seungsook
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333 25, 330124R, H03H 721, H01P 512
Patent
active
058865918
ABSTRACT:
A device includes a passive coupler circuit with lumped elements for coupling a first A.C. signal having a given center frequency (fo) present on a first primary port (P1) to two second A.C. signals phase shifted through 180.degree. present on two secondary ports (P3, P4). The device has a first and a second elementary circuit (B, B') phase shifting through 180.degree. respectively, a differential input terminal (1, 1') and a summation input terminal (2, 2') and first and second output terminals (3, 4; 3', 4'), elementary circuits being connected to each other so that the differential input terminal (1) of the first circuit (B) feeds first primary port (P1), the differential input terminal (1') of the second circuit (B') feeds a second primary port (P'1) connected to ground via an impedance (Zo), the output terminals (3, 4; 4', 3') of the first and second circuits (B, B') are coupled crosswise respectively, and feed said secondary ports (P3, P4), and the summation input terminals (2, 2') are short-circuited.
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"Microwave Mixers, Second edition" by Stephen A. Maas, published by Artech House, Boston, London. Oct. 1992, pp. 237-269.
Boyavalle Christophe
Jean Patrick
Biren Steven R.
Ham Seungsook
U.S. Philips Corporation
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