High Tc superconducting band reject ferroelectric filter (TFF)

Details High Tc superconducting band reject ferroelectric filter (TFF) High Tc superconducting band reject ferroelectric filter (TFF)

1994-09-20

1996-03-05

Lee, Benny T.

Superconductor technology: apparatus, material, process

High temperature devices, systems, apparatus, com- ponents,...

High frequency waveguides, resonators, electrical networks,...

505700, 505701, 505866, 333205, 333235, 333 99S, H01P 1203, H01B 1202

Patent

active

054967961

ABSTRACT:
The design of a high Tc superconducting band reject tunable ferroelectric filter (TFF) is presented. The band reject TFF consists of a main microstrip line on a dielectric substrate. One or more half wavelength microstrip resonators, on a ferroelectric substrate, is coupled to the main microstrip line. At a resonant frequency of a resonator, a short circuit is presented on the main microstrip line resulting in a rejection of signal of that frequency. By applying a bias voltage to a resonator, the frequency of the resonator and, as such, the reject band of the filter is changed. Different resonators can be tuned to different frequencies.

REFERENCES:
patent: 4264881 (1981-04-01), De Ronde
patent: 4467390 (1984-08-01), Carpenter, Jr.
patent: 5328893 (1994-07-01), Sun et al.
patent: 5329261 (1994-07-01), Das
Schmidt, et al; "Measured Performance at 77.degree.K of Superconducting Microstrip Resonators and Filters"; IEEE Trans on Microwave Theory & Technique; MTT-39, No. 9; Sep. 1991; pp. 1475-1479.
Patel, S. D,. and Goldie, H; "A 100 kW Solid State Coaxial Limiter for L-Band Part I;" Microwave Journal; vol. 24, No. 12; Dec. 1981; pp. 61-65.

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