Superconducting microstrip antennas: An experimental comparison of two feeding methods

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · IEEE Transactions on Antennas and Propagation (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/8.237630· OSTI ID:5927537

Richard, M A; Claspy, P C ^[1]; Bhasin, K B ^[2]

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1. Case Western Reserve Univ., Cleveland, OH (United States)
2. NASA, Cleveland, OH (United States). Lewis Research Center

The recent discovery of high-temperature superconductors (HTS's) has generated a substantial amount of interest in microstrip antenna applications. However, the high permittivity of substrates compatible with HTS causes difficulty in feeding such antennas because of the high patch edge impedance. In this paper, two methods for feeding HTS microstrip antennas at K and Ka-band are examined. Superconducting microstrip antennas that are directly coupled and gap-coupled to a microstrip transmission line have been designed and fabricated on lanthanum aluminate substrates using Y-Ba-Cu-O superconducting thin films. Measurements from these antennas, including input impedance, bandwidth, efficiency, and patterns, are presented and compared with published models. The measured results demonstrate that usable antennas can be constructed using either of these architectures, although the antennas suffer from narrow bandwidths. In each case, the HTS antenna shows a substantial improvement over an identical antenna made with normal metals.

• OSTI ID: 5927537
• Journal Information: IEEE Transactions on Antennas and Propagation (Institute of Electrical and Electronics Engineers); (United States), Vol. 41:7; ISSN 0018-926X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTENNAS
DESIGN
PERFORMANCE TESTING
SUPERCONDUCTING DEVICES
BARIUM OXIDES
COPPER OXIDES
EXPERIMENTAL DATA
FABRICATION
HIGH-TC SUPERCONDUCTORS
IMPEDANCE
SUBSTRATES
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DATA
ELECTRICAL EQUIPMENT
EQUIPMENT
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTORS
TESTING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
426000* - Engineering- Components
Electron Devices & Circuits- (1990-)
665412 - Superconducting Devices- (1992-)