MULTIFREQUENCY ANTENNA

摘要

A multifrequency antenna for receiving radio waves in a multifrequency band with no significant increase in physical size. A cut is made in a predetermined portion of a radiator conductor of a plane antenna with a single-frequency short-circuit plate so that the cut may function to shift a predetermined high-order mode resonance frequency to a desired frequency band. Thus, reception is possible at least in two different frequency bands, that is, the main mode resonance frequency and at least one high-order mode resonance frequency.