Miniature 180 degree hybrid coupler

Details Miniature 180 degree hybrid coupler Miniature 180 degree hybrid coupler

2008-08-19

2010-06-29

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S025000

Reexamination Certificate

active

07746193

ABSTRACT:
A 180° hybrid coupler (100) includes a first transmission line transformer (101) and a second transmission line transformer (102). Each of the first and second transmission line transformers is comprised of a coplanar stripline structure disposed in a spiral configuration. Each of the coplanar stripline structures has a first characteristic impedance and is configured to function as a balun. A common input feed (202) is coupled to each of the first and second transmission line transformers. A third transmission line transformer (103) and a fourth transmission line transformer (104) are also provided. Each of the third and fourth transmission line transformers is also configured to function as a balun and is coupled to the first and second transmission line transformers.

REFERENCES:
patent: 5867061 (1999-02-01), Rabjohn et al.
patent: 6806790 (2004-10-01), Ji
patent: 6993312 (2006-01-01), Salib
patent: 7332960 (2008-02-01), Burns et al.

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