High-purity polycrystalline alumina cryogenic dielectric

Details High-purity polycrystalline alumina cryogenic dielectric High-purity polycrystalline alumina cryogenic dielectric

1997-05-20

1999-11-16

Lee, Benny T.

Superconductor technology: apparatus, material, process

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

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

505700, 505866, 333 99S, 333219, H01P 700, H01B 1202

Patent

active

059873418

ABSTRACT:
An electromagnetic device, such as a resonator for a filter, incorporates a high-purity polycrystalline alumina. The device may include a superconducting component, which must be cooled significantly below room temperature. The high-purity polycrystalline alumina may be a dielectric slab in a stripline resonator, or may be used as a stand for holding other components. The high-purity polycrystalline alumina exhibits a very low loss tangent at cryogenic temperatures, and therefore will result in an electromagnetic device with superior performance characteristics.

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