BREITBANDIGE ANTENNE MIT EINEM U-FÖRMIGEN ANTENNENLEITER

摘要

An antenna device is provided which is capable of saving space, of operating in wide bands (in a multi-band) and of achieving an excellent gain and maintaining non-directivity of vertically polarized waves in each band. The antenna device has a conductor antenna. An end portion (111a) on one end side of the conductor antenna is mounted as a power feeding section and an end portion (112a) on the other end side of the conductor antenna (110) is mounted as an open end terminal. The antenna device also has a base body (120) made of an insulating material which is coupled to one end and the other end of the conductor antenna. The base body (120) is coupled in a place where an electric field strength of the conductor antenna having a folded-back portion (114) is increased, thus achieving the wide-band and high-gain antenna device.