Microwave ferroelectric phase shifters and methods for fabricati

Details Microwave ferroelectric phase shifters and methods for fabricati Microwave ferroelectric phase shifters and methods for fabricati

1993-07-06

1994-08-02

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333161, H01P 118

Patent

active

053349580

ABSTRACT:
A ferroelectric phase shifter, especially for the X-band, may be made from n elongated slab of ferroelectric material, which has a high dielectric constant that can be varied by applying an electric field. A narrow signal conductor is formed extending across a first surface of the slab, and a ground plane conductor is formed an opposite surface, forming a microstripline. An overall RF phase shifting circuit can be made by forming input and output circuits corresponding to the above-described signal conductor and interposing and connecting the signal conductor between the input and output circuits. The input and output circuits can be formed on respective, discrete substrates, with the ferroelectric slab being interposed between the substrates, or the input and output circuits can be formed on a common substrate, with the ferroelectric material inserted into a slot formed in the common substrate.

REFERENCES:
patent: 4105959 (1978-08-01), Stachejko
patent: 5032805 (1991-07-01), Elmer et al.
patent: 5162803 (1992-11-01), Chen
patent: 5223808 (1993-06-01), Lee et al.

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