STEERABLE ANTENNA USING ALGORITHM BASED ON DOWNHILL SIMPLEX METHOD

Electronically steerable passive array radiator(ESPAR) antennas are expected to gain prominence in the fleld of wireless communication, because they can be steered toward a desired signal and they can eliminate interference; in addition, they have a very simple architecture that has signiflcantly low power consumption and are inexpensive to manufacture. In this paper, we proposed an ESPAR antenna that has fastest convergence time. The downhill simplex method is used to maximize the correlation coe-cient between the received signal and the reference signal. The simulation results indicate that this antenna can be steered toward the desired signal if one signal is used; in addition, it can eliminate interference if two signals, namely, the desired signal and the interference are used by automatically varying the reactance values.