A Beam Compression Technique for Log Periodic Array

Abstract

A new technique for compressing the beam of the log periodic dipole antenna with Ψ-0° is presented. An axially displaced half wave dipole antenna provides a narrower half power beam width as compared to the conventional half wave dipole antenna. Using this fact it is theoretically shown that the beam of the log periodic dipole antenna can be compressed by axially displacing the feed points of the constituent dipoles of the log periodic dipole antenna. Typical theoretical results are given for different values of axial feed displacement.