r.f. Phase modulator

Details r.f. Phase modulator r.f. Phase modulator

1986-10-28

1987-12-01

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

333 11, H01P 132

Patent

active

047107332

ABSTRACT:
An r.f. phase modulator operable at up to extremely high frequencies. A circulator (1) having input, output, and isolated ports (2, 3, 4, respectively), channels an r.f. carrier (15) in a prescribed direction. Fitting into an open end of the output port (3) is a moving reflective surface (6) coupled via a moving plunger (7) fixedly mounted at one end thereof to a housing (5) fixedly mounted with respect to the circulator (1). A modulating signal (9) is applied to the plunger (7), causing the reflective surface (6) to move linearly within the output port (3). This change in path length of the carrier (15) produces linear phase modulation thereon. The plunger (7) can comprise a magnetostrictive material (7A), a piezoelectric material (7B), a thermally expansive material (7C), or a combination thereof. The invention can be used for temperature compensation and phase stabilization as well as phase modulation.

REFERENCES:
patent: 3136950 (1964-06-01), Mackey
patent: 3267395 (1966-08-01), Keeling et al.
patent: 3274521 (1966-09-01), Nourse
patent: 3398383 (1968-08-01), Jones et al.
patent: 3437957 (1969-04-01), Ames
patent: 3739301 (1973-06-01), Garver
patent: 3868602 (1975-02-01), Meddaugh
patent: 4507629 (1985-03-01), Frank

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