Title :
High speed radiation characteristics measurement equipment over the solid angle of a sphere to evaluate antennas attached to an 800 MHz cellular telephone
Author :
Maeda, T. ; Sekine, S. ; Obayashi, S.
Author_Institution :
Toshiba Res. & Dev. Center, Kawasaki City, Japan
fDate :
June 28 1993-July 2 1993
Abstract :
An improved measurement equipment for the radiation characteristics of a small antenna over the solid angle of a sphere has been developed on the basis of experimental investigations. It has been found from the measured results of directivity for a half-wavelength dipole antenna that a frequency coverage of 900 MHz can be obtained judging from the H-plane ripple of 2 dB. This measurement equipment displays the radiation characteristics over a sphere surrounding the test antenna for a short period of one minute including the measuring time. This equipment has been designed to evaluate an antenna attached to an 800-MHz hand-held cellular telephone.<>
Keywords :
antenna radiation patterns; antenna testing; cellular radio; characteristics measurement; dipole antennas; mobile antennas; mobile radio; 800 MHz; H-plane ripple; UHF; directivity; frequency coverage; half-wavelength dipole antenna; hand-held cellular telephone; measuring time; radiation characteristics measurement equipment; sphere; Antenna measurements; Azimuth; Frequency measurement; Poles and towers; Shafts; Solids; Telephony; Testing; UHF measurements; Velocity measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385559
