Tri-phase combiner/splitter system

Details Tri-phase combiner/splitter system Tri-phase combiner/splitter system

1992-09-03

1994-02-08

Pascal, Robert J.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333 28R, H01P 612, H01P 518

Patent

active

052851753

ABSTRACT:
A tri-phase combiner/splitter system that has similar advantages to presently available binary combiner/splitter systems which uses quadrature couplers. Notably, the combiner input Voltage Standing Wave Ratio ("VSWR") remains at 1:1 for identical mismatch impedance at the output ports. There is also a complete cancellation of back-door intermodulation components for identical output device nonlinearities. An innovative wideband, 0.degree. three way combiner/splitter is the basic building block of the present invention. To achieve equal port impedances, a new wideband transmission line transformer is used. By using 60.degree. or 120.degree. phase equalization networks at the three, 0.degree. output ports, this device is converted to a wideband tri-phase combiner.
For moderate bandwidths, a coupled transmission line version is possible using meandering strip lines in the same fashion used in quadrature coupler design. A new transmission line phase compensation technique is also accomplished using meandering strip lines.

REFERENCES:
patent: 4323863 (1982-04-01), Weber
patent: 4394629 (1983-06-01), Kumar et al.

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