RADAR RADIATION HAZARDS IN THE NEAR FIELD OF APERTURE ANTENNAS
Arthur L. Haywood · 1960
The study derived near-field gain formulas for rectangular, circular, and linear aperture antennas and found that laboratory measurements agreed with theoretical predictions.
Plain English Summary
Radio frequency energy with a power density equal to or greater than 0.01 watt per square centimeter is considered hazardous. Near-field gains were mathematically derived for rectangular, circular, and linear aperture antennas with various illumination distributions. A method of measuring power densities in the near field at given distances from a radar transmitter was presented and compared with theoretical calculations. Laboratory measurements compared favorably with theoretical predictions. Near-field antenna gain varies with the physical shape and size of the aperture, the aperture illumination, and the distance from the aperture.
Why This Matters
For rectangular apertures, three illumination distributions were analyzed: uniform-uniform, uniform-cosine, and cosine-cosine. The circular aperture analysis assumed a uniform illumination distribution. The linear aperture analysis used a cosine-tapered distribution. The rectangular aperture studied was a shaped-beam type from a cylindrical reflector with a cosecant-squared pattern.
Show BibTeX
@article{radar_radiation_hazards_in_the_near_field_of_aperture_antennas_g3638,
author = {Arthur L. Haywood},
title = {RADAR RADIATION HAZARDS IN THE NEAR FIELD OF APERTURE ANTENNAS},
year = {1960},
}