Ninety degree phase stepper

Details Ninety degree phase stepper Ninety degree phase stepper

1978-02-17

1979-05-08

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333103, 333117, H01P 118, H01P 138, H03H 730, H01P 516

Patent

active

041538862

ABSTRACT:
A 90 degree phase stepper is described comprising a tandem array of one 90 degree hybrid coupler and one 180 degree hybrid coupler. A phase shifter, capable of introducing either zero or 180 degrees of phase shift, is included in each of the two wavepaths connecting the two couplers. By the appropriate selection of phase shifts, the phase of the output signal can be continuously increased or decreased in 90 degree or 180 degree increments.

REFERENCES:
patent: 2786133 (1957-03-01), Dyke
patent: 3058071 (1962-10-01), Walsh et al.
patent: 3582790 (1971-06-01), Curtis
patent: 3718873 (1973-02-01), Garver
patent: 3996533 (1976-12-01), Lee
patent: 4004255 (1977-01-01), Chapnikoff
patent: 4088970 (1978-05-01), Fassett et al.

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