TY - GEN
T1 - On Power Angular Spectrum Estimation in a Reverberation Chamber
AU - Chen, Xiaoming
AU - Li, Teng
AU - Zhang, Ming
AU - Zhu, Shitao
AU - Zhang, Anxue
N1 - Publisher Copyright:
© 2019 European Association on Antennas and Propagation.
PY - 2019/3
Y1 - 2019/3
N2 - The power angular spectrum (PAS) is an important characteristic of the reverberation chamber (RC). Theoretical work suggests that PAS of a well-stirred RC is statistically isotropic, whereas experimental studies show certain degree of anisotropy depending on the RC loading. Since loading is inevitable for both electromagnetic compatibility (EMC) tests and over-the-air (OTA) tests, the PAS is investigated in both frequency and delay domain in this paper. An important finding of this work is that modest loading does not increase the anisotropy in the delay domain. In addition, we show that directive antenna may not be suitable for PAS estimation in the RC and that the periodogram method (for PAS estimation) used in previous literature is equivalent to conventional beamformer, suffering from frequency variation. Instead, a frequency invariant beamformer (FIB) is employed. We further show that the compensation filter of the FIB can actually be approximated by Hankel function of the first kind, simplifying the calculation of the FIB.
AB - The power angular spectrum (PAS) is an important characteristic of the reverberation chamber (RC). Theoretical work suggests that PAS of a well-stirred RC is statistically isotropic, whereas experimental studies show certain degree of anisotropy depending on the RC loading. Since loading is inevitable for both electromagnetic compatibility (EMC) tests and over-the-air (OTA) tests, the PAS is investigated in both frequency and delay domain in this paper. An important finding of this work is that modest loading does not increase the anisotropy in the delay domain. In addition, we show that directive antenna may not be suitable for PAS estimation in the RC and that the periodogram method (for PAS estimation) used in previous literature is equivalent to conventional beamformer, suffering from frequency variation. Instead, a frequency invariant beamformer (FIB) is employed. We further show that the compensation filter of the FIB can actually be approximated by Hankel function of the first kind, simplifying the calculation of the FIB.
KW - Frequency invariant beamformer (FIB)
KW - Power angular spectrum (PAS)
KW - Reverberation chamber (RC)
UR - https://www.scopus.com/pages/publications/85068468997
M3 - 会议稿件
AN - SCOPUS:85068468997
T3 - 13th European Conference on Antennas and Propagation, EuCAP 2019
BT - 13th European Conference on Antennas and Propagation, EuCAP 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th European Conference on Antennas and Propagation, EuCAP 2019
Y2 - 31 March 2019 through 5 April 2019
ER -