ANTENNA WITH ADJUSTABLE RESONANT FREQUENCY USING METAMATERIAL AND APPARATUS COMPRISING THE SAME

摘要

There is herein disclosed a miniature antenna with an adjustable resonant frequency without any change of the radiation performance, and an apparatus including the same. The antenna comprises two radiation conductors connected to a feed section and a ground plane, respectively, and a resonant circuit section as a zero-order resonator including inductors, transmission lines and a capacitor. The inductors and/or capacitor are configured of a variable element so that the impedance of the variable element can be controlled to adjust the resonant frequency of the antenna. In addition, the installation position and the size of the ground plane within the apparatus with respect to the transmission lines can also be controlled to adjust the resonant frequency of the antenna. Alternatively, the antenna may further comprise a variable capacitor connected to the inductors so as to adjust the effective inductance and change the resonant frequency. The radiation lines of the antenna are not related with determination of the resonant frequency, and thus the radiation performance is not affected by the adjustment of the resonant frequency.