A Simple Octagonal Wideband Frequency and Pattern Reconfigurable Antenna for Multiband Operations

This paper presents an octagonal bandwidth enhanced frequency and pattern reconfigurable antenna for C and X band applications. The proposed antenna can operate at dual-band with wide bandwidth. The designed antenna is simple and compact, with dimensions
$32\times 32\text{mm}$
. Two slits are made on the patch one is horizontal, and another one is inclined. Three-PIN diodes are placed in slits to achieve frequency and pattern reconfiguration. The antenna covers a wide operating range in C, X and UWB bands by employing a partial ground plane. The H plane radiation pattern is reconfigurable in 35°, 80°,105°,110°,175° and 185°. The radiation pattern steered to 120°, 240° and 270° in the E plane. The simulated results show that the designed antenna has a −10dB impedance bandwidth of 98.64% (3.61-11.7GHz), 75.9% (5.14-11.07GHz), 75.6% (5.15-10.86GHz) 66.09% (5.59-9.99GHz), 41.7% (5.62-9.64GHz) 25.65% (3.54-4.61GHz), 25.4% (3.55-4.6GHz), 22.32% (3.7-4.66GHZ) and 22.07 (3.56-4.4GHz). This antenna can be used in UWB, WiMAX, WLAN, satellite communication and space research.