The small-sized antenna which is designed by method and its method of designing the small-sized antenna which is matched vis-a-vis input impedance

摘要

As for the method of designing the small-sized antenna with the high performance which is matched vis-a-vis necessary input impedance, filtering of the antenna is unnecessary, as at the same time simply it can produce cheaply, the smallest cost, it is possible to install in the RF power amplifier easily in the component, and the smallest energy loss outside smallest. This method impedance anti- antenna geometric size/discovers the singularity (102) which, shows very high correct reactance in the wave length ratio graph in order to match in this singularity, sets the geometric structure of the antenna, desirably, at least by one gap condenser (202), includes the fact that very it occurs from this matching by adding is very given small capacitance to the antenna, high correct reactance (high inductance) is cancelled. As for the antenna, it is desirable to be the loop antenna (200), at the same time the antenna and the gap condenser (202) (204), it is desirable to execute with the method of printing on the printed circuit board or the ceramic baseplate. In addition, it is possible to execute the antenna (200), with non differential structure.