A Novel Frequency and Radiation Pattern Reconfigurable Antenna for Portable Device Applications

摘要

In this paper, a dielectric embedded antenna with frequency and radiation pattern reconfigurable characteristic is proposed for portable terminal applications. The proposed reconfigurable antenna consists of one excitation element, two parasitic elements and eight radio frequency switches. The proposed reconfigurable functions are obtained by controlling the ON/OFF states of the radio frequency switches which are integrated into the excitation elements. As a result, the proposed reconfigurable antenna can operate at two frequencies, 1.9 GHz and 2.8 GHz for supporting DCS1800 (1.71-1.88 GHz) and UNITS (1.92-2.17 GHz), LTE2300 (2.305-2.4 GHz), LTE2500 (2.5-2.69 GHz), WIFI (2.4-2.484 GHz). The radiation pattern reconfigurable characteristic is achieved by controlling the state combination of six radio frequency switches installed on the parasitic elements, resulting in three modes in the radiation pattern at each frequency band. The experimental results demonstrated that the proposed antenna can achieve good frequency and radiation pattern reconfigurable characteristics.