Circular wire loop antenna with stepped wire diameter

摘要

A circular wire-loop antenna of 1.042λ{sub}0 circumference at 1 GHz with 4:1 balun and stepped wire diameter is presented in this Letter. A fixed E-field beam offset from broadside of -7.5°is demonstrated with a VSWR of 1.17 at 1 GHz. The antenna has an operational bandwidth of 29% for VSWR < 2 and an estimated gain of 1.24 dB.