DocumentCode :
2597549
Title :
A measurement method for reflection coefficient of anechoic chamber using standing wave techniques
Author :
Aswoyo, Budi ; Makino, Osamu ; Shimoshio, Yoshifumi ; Tokuda, Masamitsu
Author_Institution :
Electron. Eng. Polytech. Inst. of Surabaya, ITS, Surabaya, Indonesia
Volume :
1
fYear :
2002
fDate :
2002
Firstpage :
115
Abstract :
This paper presents the results of measurements of the reflection coefficient of the anechoic chamber in the microwave laboratory, Electronic Engineering Polytechnic Institute of Surabaya (EEPIS), ITS, in the frequency range of 1,000 MHz to 1,700 MHz. For this purpose, we made a pyramidal horn antenna especially for the required frequency range. This antenna is used as a matching device between space (air) and the transmission line. It is also used as a device for the measurement of transmitted waves and received waves reflected by the anechoic chamber. When a radio wave is transmitted by the antenna and reflected by the anechoic chamber, there is a standing wave along the transmission line. This technique is used to measure the reflection coefficient of the anechoic chamber. In this measurement, the wave is transmitted perpendicular (or normal) to the wall surface of the chamber. Radiowaves were transmitted in three different patterns based on the structure of the pyramid wall of the chamber. From the results of the experiments, it is found that the average reflection coefficients of the chamber are 0.0586 (-24.74 dB); 0.0785 (-22.20 dB) and 0.0969 (-20.36 dB) for 1,000 MHz to 1,700 MHz.
Keywords :
UHF measurement; anechoic chambers (electromagnetic); electromagnetic wave reflection; horn antennas; reflector antennas; transmission lines; 1000 to 1700 MHz; air/transmission line matching devices; anechoic chamber reflection coefficient measurement methods; chamber pyramid wall structure; chamber wall surface; measurement frequency range; pyramidal horn antennas; reflector antennas; standing wave techniques; transmitted wave patterns; transmitted/received waves; Anechoic chambers; Antenna measurements; Frequency measurement; Horn antennas; Laboratories; Microwave devices; Microwave measurements; Reflection; Transmission line antennas; Transmission line measurements;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
Type :
conf
DOI :
10.1109/APCCAS.2002.1114919
Filename :
1114919
Link To Document :
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