CIRCULARLY POLARIZED READER ANTENNA USING THE PERFORATED FEED MEMBER

摘要

PURPOSE: A circular polarization reader antenna is provided to emit energy having maximum power by controlling the number, size, location, and interval of a perforated feed member. CONSTITUTION: A first antenna(110) comprises a first circular polarization radiator(112) and a first power feeding member(114). The first circular polarization radiator generates a right hand circular polarization wave. The first power feeding member supplies power to the first circular polarization radiator. A second antenna(120) comprises a second circular polarization radiator(122) and a second power feeding member(124). The second circular polarization radiator generates a left hand circular polarization wave. The second power feeding member supplies power to the second circular polarization radiator. At least one perforated hole is formed in the first and the second power feeding member.