Stripline-type composite right/left-handed transmission line or left-handed transmission line, and antenna that uses same

A stripline-type left-handed transmission line comprising:

• a plate-shaped substrate comprising a dielectric medium, which is either partially or wholly composed of a material with variable permittivity;
• a plurality of conductor patterns, which are disposed in an intermediate plane of said substrate, and which are periodically arranged in a fixed direction;
• ground conductors, which are disposed on the front surface and rear surface of said substrate, and which are disposed by being galvanically isolated from one another;
• and
• permittivity controlling means for changing and controlling the permittivity of said variable permittivity material by applying a direct current voltage between said ground conductors,
• wherein a conductor pattern of said plurality of conductor patterns is disposed by being galvanically isolated from another conductor pattern of said plurality of conductor patterns and said round conductors, and
• said stripline-type left-handed transmission line is capable of propagating an electromagnetic wave in a left-handed region.

An antenna that uses a stripline-type transmission line, comprising:

• a plate-shaped substrate comprising a dielectric medium, which is either partially or wholly composed of a material with variable permittivity;
• a plurality of conductor patterns, which are disposed in an intermediate plane of said substrate, and which are periodically arranged in a fixed direction;
• an aperture-equipped ground conductor, which is disposed on one of either the front surface or rear surface of said substrate, and in which a plurality of apertures are disposed;
• a ground conductor, which is disposed on the other of either the front surface or rear surface of said substrate and which is disposed by being galvanically isolated from said aperture-equipped ground conductor;
• and
• permittivity controlling means for changing and controlling the permittivity of said variable permittivity material by applying a direct current voltage to said aperture-equipped ground conductor and said ground conductor,
• wherein a conductor pattern of said plurality of conductor patterns is disposed by being galvanically isolated from another conductor pattern of said plurality of conductor patterns, said aperture-equipped ground conductor and said ground conductor, and
• an electromagnetic wave is propagated over the stripline-type transmission line comprising said substrate, said conductor pattern, said aperture-equipped ground conductor and said ground conductor, and the direction of the radiating electromagnetic wave is controlled by said permittivity controlling means.