Miniature quadrature hybrid

Details Miniature quadrature hybrid Miniature quadrature hybrid

2008-08-11

2010-06-22

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S238000

Reexamination Certificate

active

07741929

ABSTRACT:
A radio frequency (RF) directional coupler (100) can include a first transmission line element (102) having a first end and a second end, and a second transmission line element (104) having a first end and a second end. The first and second transmission line elements (102, 104) can be disposed in a first plane, where at least a portion of said first and said second transmission line elements (102, 104) are adjacent along a path. The RF coupler (100) can also include a first series of conductive coupling elements (116) disposed along said path in a second plane parallel to the first plane and separated from said first and said second transmission line elements (102, 104) by a first dielectric element (114). The first and second plane can be separated by a pre-determined distance (t2) to increase a capacitive coupling between the first and second transmission line elements (102, 104).

REFERENCES:
patent: 5767753 (1998-06-01), Ruelke
patent: 6323741 (2001-11-01), Kim

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