Ultra-wideband, directional coupler and method of...

Details Ultra-wideband, directional coupler and method of... Ultra-wideband, directional coupler and method of...

2008-06-20

2010-10-26

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S172000

Reexamination Certificate

active

07821352

ABSTRACT:
The present invention is a wideband directional coupler comprising first and second coupled transmission lines and first and second equalizers connected at opposite ends of the coupled portion of the second transmission line. Illustratively, the first and second equalizers are RC filters. The first and second equalizers are designed to have transmission characteristics that vary with frequency so as to offset the frequency variation of the coupling factor of the coupled transmission lines.

REFERENCES:
patent: 4999593 (1991-03-01), Anderson
patent: 5666090 (1997-09-01), Tsuruoka
patent: 7218186 (2007-05-01), Chen

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