Broadband HTS microstrip antennas for satellite communication

Author

Chung, Dong-Chul

Author_Institution

Div. of Inf., Commun. & Comput. Eng., Woosuk Univ., Wanju, South Korea

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

107

Lastpage

110

Abstract

The major limitation of high-T_c superconducting (HTS) microstrip antennas is the narrow bandwidth due to the high Q and thin substrate. Defining bandwidth as the frequency range over which standing wave ratio (SWR) 2:1 or less, HTS antenna bandwidths are typically 0.85% to 1.1%. Thus considerable effort has been focused on developing antennas for broadband operation. In this work the HTS antenna, which consists of two triangle-radiation patches, was designed and fabricated using a YBa₂Cu₃O_7-x (YBCO) superconducting thin film on MgO substrate for broadband operation. The input impedance and other characteristics for this antenna have been calculated using the moment method. Experimental results for our HTS antenna were reported in terms of radiation patterns, return losses, bandwidths and other various characteristics. The bandwidth obtained was a significant 6.7%

Keywords

barium compounds; high-temperature superconductors; microstrip antennas; satellite communication; superconducting microwave devices; yttrium compounds; MgO; MgO substrate; YBa₂Cu₃O_7-x; YBa₂Cu₃O₇; antenna bandwidths; bandwidths; broadband HTS microstrip antennas; broadband operation; high temperature superconductor; input impedance; radiation patterns; return losses; satellite communication; standing wave ratio; triangle-radiation patches; Bandwidth; Broadband antennas; Frequency; High temperature superconductors; Microstrip antennas; Satellite antennas; Satellite communication; Substrates; Superconducting thin films; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919296

Filename

919296