Radiating element characteristics effect on the scanning performance of phased array antenna for tracking purpose

A comprehensive study of finite phased array of Patch antennas and Vivaldi antennas is presented for missile seeker radar, with emphasis on the active admittance and scanning performance. The search, detect and track a high velocity target at a long distance by missile seeker is becoming more and more difficult as the target RCS becoming smaller due to application of stealth technology. Active phased array as missile seeker due to its potential to offer high power is a possible solution. For smaller array configuration of both patch and vivaldi, VSWR vs. scan angles, Active Admittance vs. scan angles are calculated using MATLABtrade 6.5 showing small variation with scan angles from 0⁰ to 45⁰. Also the patch and vivaldi array designs have been simulated showing the radiation pattern of single antenna and planar four element array using CST Microwave Studiotrade, Version 5 in KCSTC (Kalpana Chawla Space Technology Cell), IIT Kharagpur.