Side Lobe Level Reduction for Beam Steerable Antenna Design

This paper presents a novel antenna which represents an alternative to conventional phased array antennas. The novel antenna offers three important advantages in comparison with a conventional phased array antenna. These advantages are as follows: i) it is able to steer the beam to relatively wide angles (+/- 31 degrees), ii) it maintains low side-lobe level of < -10 dB across the steering range and iii) it achieves gain stability over the steering range. It also demonstrates relatively high gain (approximate to 15 dB) to meet the demand of high capacity and long range in wireless communication applications. The proposed array antenna involves the use of parasitic elements and phase shifters.