Log Periodic Dipole Antenna Design Using Particle Swarm Optimization

This paper presents an optimized design of Log Periodic Dipole Antenna (LPDA) for GSM phase (I and II), WiMAX, Bluetooth , Wi-Fi and 3G mobile communication bands. First, the LPDA is designed by evaluating its parameters and then it is optimized by using evolutionary technique called Particle Swarm Optimization (PSO). It is observed that in optimized design, the VSWR is closed to its ideal value i.e. 1. Moreover, the gain is improved up to an average of 0.6 dB as compared to the initial gain. It is also noticed that the optimized design is physically of smaller size as compared to the initial one. It gives an ease in implementation which is consequently cost effective.