DOUBLE RESONANCE ANTENNA AND ANTENNA FOR PORTABLE RADIO

摘要

A small-sized antenna operating in a plurality of frequency bands in which a pattern of antenna elements (14) capable of resonating in a plurality of frequency bands is formed on the outer circumferential surface of an antenna bobbin (12). A parasitic conductor (11) is fitted in a containing hole made substantially along the central axis of the antenna bobbin (12). An antenna operating well in the frequency bands of AMPS, PCS and GPS can thereby be attained.