Title :
Propagation and antenna measurements using antenna switching and random field measurements
Author :
Murase, Masahiro ; Tanaka, Yoshikazu ; Arai, Hiroyuki
Author_Institution :
Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
fDate :
8/1/1994 12:00:00 AM
Abstract :
For antenna diversity measurements, it is necessary to calibrate receivers for every sequence of measurement. A calibration-free measurement system using a single receiver and antenna switching is proposed. Experiments showing the antenna sampling interval needed for characterizing diversity antennas are presented. Antenna switching can also be used to compare the relative gain of a test and a reference antenna in identical environments by the random field measurements (RFM) method. We measured the gain reduction caused by the human carrier of portable phone antennas and by the inclination angle of the handheld terminal antenna. The gain was -8.4 dB with 2.8 dB standard deviation for the vertical orientation
Keywords :
antenna testing; diversity reception; gain measurement; measurement systems; mobile antennas; mobile radio systems; radiowave propagation; -8.4 dB; antenna diversity measurements; antenna sampling interval; antenna switching; calibration-free measurement system; gain reduction; handheld terminal antenna; human carrier; inclination angle; portable phone antennas; random field measurements; receiver; reference antenna; relative gain; standard deviation; test; vertical orientation; Antenna measurements; Antennas and propagation; Envelope detectors; Gain measurement; Humans; Receiving antennas; Semiconductor device measurement; Signal detection; Switches; Testing;
Journal_Title :
Vehicular Technology, IEEE Transactions on
