CIRCULARLY POLARIZED ANTENNA, ANTENNA FOR RELAY STATION AND RELAY STATION AND MOBILE COMMUNICATION SYSTEM USING THE SAME

摘要

A circularly polarized antenna is provided to reduce frequency interference at the downtown area, by using different circularly polarized wave, reduce size of the antenna and the relay station by guaranteeing isolation between the transmission antenna and the receiver antenna. The transmission antenna(200) or the receiver antenna(100) includes radiators(110) radiating the electromagnetic wave, more than one electric suppliers(120) connected to radiator and which it hastily delivers in the radiator, feeder circuit parts(130,230) supplying the power feed signal to the electric supplier, backside conductor boards(150,250) arranged in order to be faced with radiator and is greater than radiator, and more than one side conductors(140,240) formed in order to surround radiator with the radiator outer side. The electric supplier and feeder circuit part hastily deliver in radiator so that the circularly polarized wave is radiated from radiator.