Properties of an electromagnetically coupled small antenna with asuperconducting thin-film radiator |
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| Authors: | Suzuki N Itoh K Nagai Y Michikami O |
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| Affiliation: | NTT Interdisciplinary Res. Labs., Ibaraki; |
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| 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 λ/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 |
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