Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1994-03-28
1995-07-11
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333246, H01P 118, H01P 308
Patent
active
054324874
ABSTRACT:
A microwave monolithic integrated circuit (MMIC) differential Schiffman phase shifter includes an input microstrip for receiving an input signal. First and second parallel microstrips produce a phase shifted signal from the input signal. The first microstrip is coupled at a first end to the input microstrip and at a second end to an end microstrip. The second microstrip is coupled at a first end to the end microstrip. An output microstrip is coupled to the second microstrip at a second end of the second microstrip and the input microstrip and the output microstrip are capacitively coupled. The output microstrip produces an output signal from the phase shifted signal.
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An article entitled "A New Class of Broad-Band Microwave 90-Degree Phase Shifters" by B. M. Schiffman, IRE Transactions on Microwave Theory and Techniques, Apr. 1958, pp. 232-237.
An article entitled "Broadband Matching of Microstrip Differential Phase Shifters" by B. Schiek et al., 1976 European Microwave Conference Proceedings, pp. 647-651.
Ham Seungsook
Motorola Inc.
Nehr Jeffrey D.
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