PURPOSE: To obtain an antenna system of small size with excellent impedance characteristic by providing plural unipole antennas in parallel with one dielectric rod in spiral and incorporating the unipole antennas and the feeder.
CONSTITUTION: Parts 5a, 5b of a feeder and spiral unipole antennas 6a, 6c are provided to the dielectric rod 7. As the methods of provision, stretching of conductive tape, etching and pasting of conductor plate are considered. In the antenna system, the power from an oscillation source 1 is fed to spiral unipole antennas 6a, 6b, 6c via the feeder 2 and the parts 5a, 5b of the feeder and irradiated in space. The dielectric rod 7 supports the parts 5a, 5b of the feeder and the spiral unipole antennas 6a, 6b, 6c, they are incorporated and the strength of the antenna system is improved as a whole.
SATO SHINICHI
SUNAHARA YONEHIKO
