Title :
Broadband HTS microstrip antennas for satellite communication
Author :
Chung, Dong-Chul
Author_Institution :
Div. of Inf., Commun. & Comput. Eng., Woosuk Univ., Wanju, South Korea
fDate :
3/1/2001 12:00:00 AM
Abstract :
The major limitation of high-Tc 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 YBa2Cu3O7-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; YBa2Cu3O7-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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
