Wave transmission lines and networks – Coupling networks – With impedance matching
Patent
1997-07-12
1998-08-11
Gensler, Paul
Wave transmission lines and networks
Coupling networks
With impedance matching
333247, H01P 508
Patent
active
RE0358690
ABSTRACT:
An active device, such as a field effect transistor ("FET") or MMIC, converts microwave signals between a microstrip transmission line ("microstrip") and a coplanar wave guide ("CPW"). In microstrip-to-CPW conversion using a simple FET, a gate connection is made to the microstrip signal conductor. A drain connection is made to the center conductor on the CPW. Two FET source terminals are connected respectively to each CPW ground strip. The ground strips are electrically coupled to the microstrip ground plane with a minimum length connection so the inductance common to the FET input and output is minimized. The FET can be reconnected so as to reverse the input and output, providing for conversion of signals from CPW to microstrip. Conversion from microstrip to an intermediate CPW and back to microstrip provides for mounting an intermediate circuit, such as an amplifier or other MMIC, directly on the CPW.
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Anderson Edward B.
Endgate Corporation
Gensler Paul
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