Phase shifting device

Details Phase shifting device Phase shifting device

1985-06-12

1986-12-02

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333156, 333161, H01P 1185, H01P 308

Patent

active

046268073

ABSTRACT:
A phase shifting device including a coupling device having an input port, an output port and a further port. The further port is connected to a transmission line, along the length of which are connected a number of switches. Each switch is operable to connect a low impedance across the transmission line such that an input signal applied to the input port is reflected at a connected one of the switches to produce an output signal at the output port whose phase is shifted relative to that of the input signal by an amount dependent on the length of transmission line traversed by the input signal. Alternatively the capacitance of each of the switches may be operated so as to vary the propagation constant of the transmission line to thereby produce the required phase shift.

REFERENCES:
patent: 3454906 (1969-07-01), Hyltin et al.
patent: 3506930 (1970-04-01), Gantick
patent: 3656069 (1972-04-01), Beccone et al.
patent: 4205282 (1980-05-01), Gipprich
patent: 4275366 (1981-06-01), Schwarzmann
patent: 4423393 (1983-12-01), Freitag et al.
Hardin et al--"Electronically-Variable Phase Shifters Utilizing Variable Capacitance Diodes", Proc. IRE, May 1960; pp. 944-945.
Yahara et al--"Broad-Band 180.degree. Phase Shift Section in X Band", IEEE Trans. on Microwave Theory and Techniques, Mar. 1975; pp. 307-309.

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