The antenna and its production method and the walky-talky terminal which uses the same antenna

摘要

At the same time cheapness the small-sized antenna and its production method and loads the same antenna the walky-talky terminal which operate, with multi modes above especially 3 modes in order to materialize the small-sized multimedia radio terminal are offered. The ground conductor inputting the high-frequency power which is supplied in the single supply of electricity 0.7 where designates the portion of 2 which possesses ground electric potential and ground conductor 2 as one end and supply of electricity 0.7, it has with the plural transmission circuits where each one emits the electromagnetic wave of 3 frequency of 3 modes to the space. As for these transmission circuits, one end is connected by supply of electricity 0.7, the transmission circuit in the transmission circuit consists of with the transmission circuit 51,61,62 which is connected 42 which is connected between 41 where the other edge is connected to turning point 31 and turning point 31,32 and the above-mentioned turning point, in supply of electricity 0.7 in order for impedance matching to be done vis-a-vis plural frequencies, the respective length of the transmission circuit is set. Antenna 1 is formed with one metallic plate.