| 摘要 |
A stripline-type transmission line can easily change and control transmission characteristics by changing the permittivity of a substrate, and also provides an antenna that can extensively change and control the direction of radiation with the frequency of an electromagnetic wave constant, by using the transmission line. The antenna has a substrate having a material With variable permittivity; a plurality of conductor patterns, which are periodically arranged in an intermediate plane of the substrate; an aperture-equipped ground conductor, which is disposed on a surface of the substrate, and in which a plurality of apertures are disposed; a ground conductor disposed on the rear surface of the substrate; and a permittivity controller for changing and controlling the permittivity of the variable permittivity material by applying a direct current voltage to the aperture-equipped ground conductor and the ground conductor.
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