Abstract
A simple realization method for pattern reconfigurable antenna structures based on a shape memory alloy (SMA) is presented here. The proposed antenna is designed for automobile applications for safety, comfort, and commercial usage purposes. It is capable of communicating with neighbouring automobiles and also with roadside units. The patch of the antenna is made up of two-way SMA which comprises of two rectangular patches (patch 1 and patch 2) with antenna dimensions of 74 × 58 mm2. Upon exciting patch 1 through resistive heating, the antenna generates a tilted beam at an angle of 330°, and similarly for patch 2 at an angle of 30°, thus realizing pattern reconfigurability in the antenna. The operating frequency of the proposed pattern reconfigurable antenna is 2.68 GHz and it radiates with a reflection coefficient (S11) below − 10 dB. The desired pattern is achieved by training the SMA for the two-way effect. The prototype of the proposed antenna has been designed, fabricated, tested, to validate the experimental results and finally performance have been studied.
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