Antenna device and a method of making the antenna

摘要

An antenna device comprising a hollow dielectric plastic holder ( 17 ) with a pair of opposite ends. A first helical electrode plate ( 18 ) is attached to one of the pair of opposite ends and has a first terminal device ( 25 ). A second flat electrode plate ( 19 ) is attached to the other of the pair of opposite ends and has a second terminal device ( 28 ).