BUILT-IN ANTENNA FOR MOBILE COMMUNICATION TERMINAL, HAVING CENTER FEEDER STRUCTURE AND NON-DIRECTIONAL RADIATION PATTERN

摘要

PURPOSE: A built-in antenna is provided to allow the antenna to be mounted in a terminal having a small grounding surface, by disposing a feeder point for feeding electromagnetic signals at the center of the antenna such that the antenna has a non-directional radiation pattern. CONSTITUTION: A built-in antenna(40) comprises a feeder point(43) disposed on the center of the antenna such that the feeder point feeds electromagnetic signals to the antenna; radiators(41,42) for radiating the electromagnetic signals in a non-directional wave; a short circuit pin(46) for grounding the antenna; and a short circuit network(48) interposed between the short circuit pin and the feeder point, wherein the short circuit network has an inductance component for offset of an antenna capacitance component.