PURPOSE: To simplify and miniaturize a dipole antenna without degrading the radiation characteristic by setting dipoles, feeders, and matching circuits, which consist of a ceramic compound of an oxide superconductor, to both faces of a dielectric plate with desired shapes and dimensions.

CONSTITUTION: Dipoles 1a and 1b, feeders 2a and 2b, and matching circuits 5a and 5b consist of a ceramic compound of an oxide superconductor and are set to both faces of a dielectric plate 6. Parts of dipoles 1a and 1b are formed on opposite sides of the dielectric plate 6. The matching circuit 5a is formed on the rear face of the dipole 1a, and the matching circuit 5b is formed on the rear face of the dipole 1b, and these matching circuits have a micro strip line structure. That is, since dipoles 1a and 1b, feeders 2a and 2b, and matching circuits 5a and 5b consist of a ceramic compound, a superconductive state is obtained at a higher temperature in comparison with a general metallic conductor and the loss resistance is easily set by zero. Thus, the radiation efficiency is easily improved.