Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – High frequency waveguides – resonators – electrical networks,...
Patent
1997-06-05
2000-06-13
Lee, Benny T.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
High frequency waveguides, resonators, electrical networks,...
505700, 505701, 505866, 333995, 333161, H01P 118, H01B 1202
Patent
active
06076001&
ABSTRACT:
A symmetrical coplanar waveguide is formed by a spiral with three arms. One arm is 1, the second arm is 2 and the 3rd arm is 41. The arms 1 and 2, and spiral arms 1 and 41 are separated by equal distance. The spiral arms 1, 2 and 41 are formed by the deposition of films of a conductor, layer 3, on a film 14 of a single crystal ferroelectric material, layer 2, which is deposited on a single crystal dielectric material, layer 1. Input is 10 and the output is 11. The CPW spiral arms 1, 2 and 41 form a time delay device. When a bias voltage V is applied between the spiral arms 1 and 2, and between 1 and 41 through a bias filter made of L and C, the permittivity of the ferroelectric film between the spiral arms 1 and 2, and between 1 and 41 or across the CPW, changes producing a change in the time delay. By the application of different levels of bias voltage between the spiral arms 1 and 2, and between 1 and 41, different permittivity of the ferroelectric material are obtained and thus different changes in the time delay are obtained. Thus a variable time delay is obtained. Other delay embodiments are (1) meander line, (2) square shaped structure, (3) interdigital line, (4) parallel CPW.
REFERENCES:
patent: 5164692 (1992-11-01), Gertel et al.
patent: 5472935 (1995-12-01), Yandrofski et al.
patent: 5777532 (1998-07-01), Lakin
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