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International Journal of Antennas and Propagation
Volume 2015, Article ID 383925, 5 pages
Research Article

EIRP Characterization of Electrically Large Wireless Equipment with Integrated Signal Generator in a Compact Environment

1Department of Electrical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Republic of Korea
2Plan and Budget Team, KEIIT, 305 Teheran-ro, Gangnam-gu, Seoul 135-080, Republic of Korea
3Radio Technology Research Department, ETRI, 218 Gajeong-ro, Yuseong-gu, Daejeon 305-700, Republic of Korea

Received 25 August 2014; Revised 26 March 2015; Accepted 31 March 2015

Academic Editor: Ding-Bing Lin

Copyright © 2015 Soon-Soo Oh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We describe a measurement technique to characterize the equivalent isotropically radiated power (EIRP) of electrically large wireless equipment in a compact environment. A modified phase-measurement method was proposed and, thus, the separation of the signal generator and radiating element was not required during the measurement. A Fresnel-to-far-field transformation was used for the fast measurement time in a compact anechoic chamber. An experimental verification of the method was carried out in a compact anechoic chamber, where the source-detector separation was approximately 1/5 of the far-field distance. The measured magnitude and phase pattern exhibited only a small error. The EIRP obtained using a Fresnel-to-far-field transformation was compared with a reference value, and the error was within 0.5 dB.