Compact Frequency Reconfigurable Antenna for LTE/WWAN Mobile Handset Applications
In this communication, a compact frequency reconfigurable antenna for LTE/WWAN mobile handset applications is proposed. The proposed antenna mainly consists of radiating elements and two PIN diodes. In addition, the antenna has a simple structure with a compact size of 36.5 x 10 mm2. This antenna operates in six modes, and each mode is given a different resonant pathway by adjusting the bias states of two PIN diodes. When PIN diodes #1 and #2 are in the ON and OFF states, respectively, the proposed antenna can cover the LTE700 (698 787 MHz) band by operating in mode 1. Moreover, the wide bandwidth in a higher band formed by combining modes 2 and 3 can cover the LTE2300 (2305 2400 MHz) and LTE2500 (2500 2690 MHz) bands. When PIN diodes #1 and #2 are in the OFF and ON states, respectively, a resonant frequency in the lower band is formed by integrating modes 4 and 5. This can cover the GSM850 (824 894 MHz) and GSM900 (880 960 MHz) bands. When the two PIN diodes are in the ON state, the proposed antenna can cover the GSM1800 (1710 1880 MHz) GSM1900 (1850 1990 MHz) and UMTS (1920 2170 MHz) bands in operating mode 6.
IEEE Transactions on Antennas and Propagation