High impedance ratio wideband transformer circuit

Details High impedance ratio wideband transformer circuit High impedance ratio wideband transformer circuit

1995-09-14

1997-04-08

Gensler, Paul

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

333 32, H03H 742, H03H 738

Patent

active

056191723

ABSTRACT:
A transformer circuit disclosed performs wideband impedance transformation (matching) and can be used for voltage step-up and step-down applications. The circuit disclosed is comprised of two transmission line transformers and two reactive impedances that compensate the circuit for impedance versus frequency. The circuit disclosed performs a very wideband impedance ratio of 1:9. The circuit may have different turns ratios for T1 and T2 and different values for Z1 and Z2 to accommodate rational, fractional and integer values of transformation up to an impedance ratio of 16:1. The addition of a balun to the output provides a balanced output.

REFERENCES:
patent: 3244998 (1966-04-01), Broadhead, Jr.
patent: 3882432 (1975-05-01), Bowman et al.
patent: 4201962 (1980-05-01), Hosoya
patent: 5051710 (1991-09-01), Kaltenecker
patent: 5216393 (1993-06-01), Wandel
patent: 5309120 (1994-05-01), Koontz
patent: 5495212 (1996-02-01), DeCramer

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