Title :
Properties of an electromagnetically coupled small antenna with a superconducting thin-film radiator
Author :
Suzuki, N. ; Itoh, K. ; Nagai, Y. ; Michikami, O.
Author_Institution :
NTT Interdisciplinary Res. Labs., Ibaraki, Japan
fDate :
3/1/1996 12:00:00 AM
Abstract :
This paper describes the structure and properties of a 900-MHz-band small antenna with a superconducting thin-film radiator operated by electromagnetic coupling. The radiation efficiency of the antenna with a /spl lambda//38 radiator reached 74% at 79 K. The loss in this antenna comprised mismatching loss and radiator loss caused by the surface resistance of the superconducting thin film. A simulation model with a meander-line radiator and a parallel line is also proposed. This model makes it possible to design a superconducting thin-film radiator which can be fabricated on a dielectric substrate by using the moment method without taking account of the dielectric substrate.
Keywords :
antenna radiation patterns; losses; method of moments; microstrip antennas; superconducting device testing; superconducting microwave devices; superconducting thin films; 74 percent; 79 K; 900 MHz; dielectric substrate; electromagnetically coupled small antenna; meander-line radiator; mismatching loss; moment method; radiation efficiency; radiator loss; simulation model; superconducting thin-film radiator; surface resistance; Capacitors; Dielectric substrates; Dielectric thin films; Directive antennas; Electromagnetic coupling; Microstrip antennas; Moment methods; Superconducting films; Superconducting thin films; Surface resistance;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
