Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1994-06-07
1995-08-29
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333238, H01P 518
Patent
active
054464250
ABSTRACT:
In a quarter-wavelength coupled line type directional coupler including a first dielectric layer having first and second surfaces parallel to each other, a ground plane conductor is formed on the first surface of the first dielectric layer, and two coupled microstrip conductors each having a quarter wavelength are formed on the second surface of the first dielectric layer, arranging close to each other so as to be electromagnetically coupled with each other. Further, a second dielectric layer is formed on the second surface of the first dielectric layer, on which the coupled microstrip conductors are formed, and a floating potential conductor is formed on the second dielectric layer, arranging close to the microstrip conductors so as to be electromagnetically coupled with the coupled microstrip conductors. Then a cut portion is formed in the ground plane conductor so that the ground plane conductor is separated apart from the coupled microstrip conductors by a predetermined distance.
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"A Wide-Band 3-DB Coupler With A Very Tightly Coupled Cross-Section Of Microstrip Lines", K. Sachse, Technical University of Wroclaw, Wroclaw, Poland.
ATR Optical and Radio Communications Research Laboratories
Gensler Paul
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