Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1995-09-15
1997-04-29
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333246, H01P 518
Patent
active
056253281
ABSTRACT:
A stripline directional coupler having a quarter-wave transmission line added either between the isolation port of the coupler and the termination impedance or between the input port of the coupler and the signal input reduces the degradation of coupler directivity caused by impedance mismatch of the transmission lines with the source, load and/or termination impedances. With the transmission lines and additional quarter-wave transmission line formed on the same substrate material, coupler directivity is insensitive to the value of the characteristic impedance of the transmission lines. This allows the use of less expensive substrate materials and manufacturing processes during stripline directional coupler construction.
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E-Systems Inc.
Gensler Paul
Meier Harold E.
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