학술논문
Measurement Technique for Evaluating Radio Frequency Absorption
Document Type
Conference
Author
Source
2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Advanced Topics in Electrical Engineering (ATEE), 2023 13th International Symposium on. :1-4 Mar, 2023
Subject
Language
ISSN
2159-3604
Abstract
This paper presents aspects regarding the measurement technique in order to implement the recommendations for evaluating the absorption of radio-frequency (RF) signals, according to IEEE Std. 1128-1998(R2012). To characterize the absorption properties of materials used in the field of signal absorption, the standard recommends several test methods, opting for the arch method. A type of RF absorber with pyramidal geometry was tested, the measurements being carried out in the frequency range 3 - 5 GHz, with horn antennas. A measurement without absorbents was first performed to determine the reference level. The reflection coefficients of the material were then measured for a positioning of the antennas at an angle of 30° inside the arc. The results obtained, which are tabulated, for different frequencies, indicate the level of absorption (loss) in the RF absorbing material. A procedure for measuring a basic property of RF absorbers is therefore proposed.