Microstrip directional coupler with single element compensation

Details Microstrip directional coupler with single element compensation Microstrip directional coupler with single element compensation

1991-01-29

1992-10-27

LaRoche, Eugene R.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333116, H01D 518

Patent

active

051592983

ABSTRACT:
A microstrip directional coupler which employs closed form solutions for compensating capacitance or inductance and odd mode characteristic impedance necessary to realize high directivity or match in microstrip directional couplers valid for tight and loosely-coupled sections. A microwave monolithic integrated circuit (MMIC) directional coupler with single capacitive or inductive compensation derives from a mathematical analysis using symmetry and reflection and transmission coefficients' equivalency. Closed form solutions for the compensating capacitance or inductance and a new odd mode characteristic impedance are generated. The results are implemented in single antisymmetric inductive and antisymmetric and symmetric capactive compensated versions.

REFERENCES:
patent: 3593208 (1971-07-01), Smith
patent: 4216446 (1980-08-01), Iwer
patent: 5055809 (1991-10-01), Sagawa et al.

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