ANTENNA DEVICE AND PORTABLE TERMINAL

摘要

An antenna device (3a) includes a substrate (11) and an antenna (21) provided on the substrate (11) and having an electrical length of ( lambda /2)xA (A is an integer). The antenna (21) includes a plate antenna (21b) positioned at a portion where an electrical length from an end portion (21d) is approximately lambda /4+( lambda /2)xB (B is an integer), and a meander line antenna (21a, 21c) connected to the plate antenna (21b).