Properties and applications of HTS-shielded dielectric resonators: A state-of-the-art report

Journal Article · Mon Jul 01 00:00:00 EDT 1996 · IEEE Transactions on Microwave Theory and Techniques

DOI:https://doi.org/10.1109/22.508242· OSTI ID:282452

Klein, N; Scholen, A; Tellmann, N; Zuccaro, C; Urban, K W ^[1]

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1. Forschungszentrum Juelich GmbH (Germany). Inst. fuer Festkoerperforschung

High temperature superconductor (HTS) shielded dielectric resonators (DRs) have demonstrated to provide quality factors Q between 5 {times} 10{sup 5} and several 10{sup 6} at frequencies up to 20 GHz and levels of dissipated rf power in the range of Watts. As dielectric materials, high purity single crystals of sapphire, LaAlO{sub 3}, and rutile exhibit sufficiently low microwave losses. There are two main areas of application which are considered to benefit from HTS-shielded DRs, namely low-phase-noise oscillators for radar systems and digital communication, and high-power filters for satellite communication. Projections for phase noise are {minus}145 dBc/Hz at 1 kHz offset from the carrier frequency, a value of {minus}110 dBc/Hz at 1 kHz was measured recently for an oscillator with a carrier frequency of 5.6 GHz. Modeling of filters based on resonators with Qs in the 10{sup 6} range indicates their ability to reduce the rf power dissipation apparent in the output multiplexers of communication satellite payloads. Presently, schemes for resonator coupling and tuning while maintaining high Qs are under development.

• OSTI ID: 282452
• Journal Information: IEEE Transactions on Microwave Theory and Techniques, Vol. 44, Issue 7Pt2; Other Information: PBD: Jul 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
SUPERCONDUCTING CAVITY RESONATORS
USES
TECHNOLOGY ASSESSMENT
HIGH-TC SUPERCONDUCTORS
PERFORMANCE
LANTHANUM OXIDES
ALUMINIUM OXIDES
ENERGY LOSSES
COMPUTERIZED SIMULATION