Title :
Antenna pattern effects in normalized site attenuation
Author :
McConnell, Roger A.
Author_Institution :
CKC Lab. Inc., Mariposa, CA, USA
Abstract :
In the ANSI C63.4 development of normalized site attenuation (NSA) for vertical polarization the E-field sine pattern generated by short dipoles was used to account for the additional attenuation that occurs as a function of the antenna patterns. A pattern dependent NSA equation is developed incorporating antenna pattern factors for any types of antennas for which mathematical expressions of the patterns exist. For resonant dipoles, biconicals and log-periodics the decibel differences from the existing standard have been found to be small, leading to increased confidence in the utility of the present standard
Keywords :
antenna radiation patterns; attenuation measurement; conical antennas; dipole antennas; electromagnetic fields; electromagnetic wave absorption; electromagnetic wave polarisation; log periodic antennas; measurement standards; ANSI C63.4 standard; E-field sine pattern; antenna pattern effects; biconical antenna; log-periodic antenna; normalized site attenuation; pattern dependent NSA equation; resonant dipoles; short dipoles; vertical polarization; Attenuation; Dipole antennas; Equations; Log periodic antennas; Receiving antennas; Reflector antennas; Resonance; Silicon compounds; Transmitting antennas;
Conference_Titel :
Electromagnetic Compatibility, 1999 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5057-X
DOI :
10.1109/ISEMC.1999.810193
