DUAL BAND OMNI ANTENNA HAVING WIDE BAND CHARACTERISTICS HAVING TWO-STAGE RADIATION ELEMENT INCLUDING FIRST RADIATOR, SECOND RADIATOR, REFLECTOR, AND RADOME UNIT ARRANGED SYMMETRICALLY WITH EACH OTHER CENTERING FROM CONNECTOR

摘要

PURPOSE: A dual band omni antenna is provided to uniformly form an omni directional beam pattern in a horizontal direction by arranging a first radiator, a second radiator, a reflector, and a radome unit symmetrically with each other centering from a connector. CONSTITUTION: A dual band omni antenna comprises a connecting unit(11) for inputting/outputting an RF signal; a first radiator(14) for resonating the high frequency signal input from the connecting unit, and matching the low frequency signal input from the connecting unit; a second radiator(15) electrically connected to the first radiator, and which resonates the low frequency signal input from the connecting unit; a reflector(16) for radiating the wave radiated from the first and second radiators in the radiation pattern same as that of a symmetric dipole antenna, by reflecting the wave; a dielectric unit(13) for spacing apart the first and second radiators from the reflector; and a radome unit(17) for forming a uniform omni directional beam pattern in a horizontal direction, from the wave radiated from the first and second radiators and the wave reflected from the reflector.