RADIO COMMUNICATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To ensure a sufficient frequency bandwidth while holding the operation of a surface-mounted antenna stably. SOLUTION: A surface-mounted antenna 10 is composed of a feed element 13 and a passive element 14 formed on the surface of a dielectric base. The feed element 13 includes a feed radiation electrode 16 and a feed electrode 17. The passive element 14 includes a passive radiation electrode 20 and a ground electrode 21. The feed and passive elements 13, 14 make a double resonance. The antenna 10 is mounted with the feed electrode 17 and the ground electrode 21 located approximately at the center of the end side 11a of a circuit board 11.