Title :
Scanning height for ANSI C63.5 calibrations
Author :
Cavcey, Kenneth E. ; Camell, Dennis G.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
The configuration of antennas at an open area test site (OATS) for calibrations results in constructive and destructive electric fields. Regardless of the calibration method used, the antenna to be calibrated should be located where the field varies slowly. We derive the conditions for a slowly varying field near the location of constructive interference as a function of the height of the transmitting antenna and the field geometry. We show experimental data taken by keeping the receiving antenna fixed per the ANSI standard and scanning the transmitting antenna in height. Repeatability of antenna factor data is improved to less than ±0.3 dB by avoiding nulls in the field
Keywords :
ANSI standards; antenna testing; calibration; electric field measurement; electric fields; electromagnetic interference; test facilities; transmitting antennas; ANSI C63.5 calibrations; antenna factor data repeatability; antennas configuration; constructive electric fields; destructive electric fields; field geometry; open area test site; receiving antenna; scanning height; slowly varying field; transmitting antenna height; Antenna measurements; Antennas and propagation; Calibration; Dipole antennas; Geometry; Interference; Measurement standards; Open area test sites; Receiving antennas; Transmitting antennas;
Conference_Titel :
Electromagnetic Compatibility, 1998. 1998 IEEE International Symposium on
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-5015-4
DOI :
10.1109/ISEMC.1998.750333
