Planar digital ferroelectric phase shifter

Details Planar digital ferroelectric phase shifter Planar digital ferroelectric phase shifter

1993-01-19

1994-04-26

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333 33, H01P 118, H01P 308

Patent

active

053070330

ABSTRACT:
A planar stripline type of ferroelectric phase shifter which includes a set f series coupled phase shifter sections, each having mutually different and binary weighted lengths of ferroelectric phase shifting material. Fixed amplitude control voltages are respectively applied to one or more lengths of ferroelectric material the permittivity and effective electrical length of which change to provide a desired composite phase shift. The phase shifter, moreover, employs half wavelength spacings between elements or matching networks therebetween so that the microwave signal propagating through the phase shift will be minimally impeded between the input end and an output end.

REFERENCES:
patent: 3295138 (1966-12-01), Nelson
patent: 3568105 (1971-03-01), Felsenheld
patent: 4305052 (1981-12-01), Baril et al.
patent: 5032805 (1991-07-01), Elmer et al.
patent: 5212463 (1993-05-01), Babbitt et al.

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