PORTABLE WIRELESS TERMINAL

摘要

A portable telephone (1a) includes a metal substrate (11), a shield box (14), a monopole antenna (21) and a feed unit (12). The surface of the metal substrate (11) includes a conductive metal layer (41a). The shield box (14) covers a radio transmitter-receiver unit provided on the metal substrate (11) to electromagnetically shield the radio transmitter-receiver unit, and has conductivity. The monopole antenna (21) extends in a predetermined direction, and has an electrical length of ( lambda /2) x N (N is an integer). The feed unit (12) is provided at the metal substrate (11) so as to be apart from the shield box (14) in the extending direction of the monopole antenna (21). The feed unit (12) includes a matching circuit (13).