నైరూప్య

ANALYSIS OF ERROR INDUCED IN THE NEAR- FIELD DUE TO MEASURING DIPOLE PROBE

Harish.M.S, Dr. Paramesha

Open-ended rectangular wave guide with infinite ground plane acts as an electromagnetic field radiator. A standard 2.296×1.016 cm X- band WR-90 rectangular waveguide with infinite ground plane of operating frequency 9 GHz is used as a radiator. The radiation from the wave guide arise due to current distribution on the inside walls of the wave guide, the current distribution associated with the fields propagated in the interior of the guide as well as in free space .A dipole is used as a measuring probe in a near field radiated by a wave guide radiator with infinite ground plane. This report discusses the error induced in the measuring probe in near field at different positions .The current density and electric field intensity are measured at different positions using measuring probe.