Low-loss coupler

Wave transmission lines and networks – Plural channel systems – Having branched circuits

Reexamination Certificate

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Details

C333S204000

Reexamination Certificate

active

07026885

ABSTRACT:
A coupler includes a first set of ports coupled to a first ring, a second set of ports coupled to a second ring, and a plurality of connecting elements coupled between the first and second rings. The coupler provides low loss insertion and high port isolation and may be used as a standalone coupler or as an elementary device for building Butler matrices of varying configurations.

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patent: 5659274 (1997-08-01), Takahashi et al.
patent: 6710679 (2004-03-01), Zhu
patent: 6803838 (2004-10-01), Hoyland

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