ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
권호 표지
DOI QR코드

DOI QR Code

A Low-Cost Method to Evaluate Absorber Reflectivity Using an Antenna with a Small Radiating Aperture and Frequency-Domain Instrument

  • Oh, Soon-Soo (Broadcasting & Telecommunications Media Research Laboratory, ETRI, Department of Electronic Engineering, Chosun University) ;
  • Lee, Young Hwan (Broadcasting & Telecommunications Media Research Laboratory, ETRI)
  • Received : 2013.07.03
  • Accepted : 2013.08.26
  • Published : 2013.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

We propose a way to measure the absorber reflectivity at a low cost. Only one simple antenna with a small radiating aperture and a frequency-domain instrument are utilized. The previously used equation for calculating the reflectivity of an absorber is inaccurate, and, therefore, a new equation is derived based on multiple reflection analysis and three test models. Notably, the reflection coefficient of the antenna is included in the derived equation. The accuracy of the proposed method is proven through simulation and measurements. It can be easily applied to a product examination by absorber manufacturers and customers owing to its advantages of simplicity, cost effectiveness, and non-cutting examination.

Keywords

References

  1. L.H. Hemming, Electromagnetic Anechoic Chambers, New York: Wiley & Sons, Inc., 2002.
  2. R.E. Hiatt, E.F. Knott, and T.B.A. Senior, A Study of VHF Absorbers and Anechoic Rooms, University of Michigan/NASA, Feb. 1963.
  3. IEEE Std 1128-1998, IEEE Recommended Practice for Radio- Frequency (RF) Absorber Evaluation in the Range of 30 MHz To 5 GHz, Apr. 1998.
  4. J. Lee, Y.J. Yoon, and S. Lim, "Ultra-Thin Polarization Independent Absorber Using Hexagonal Interdigital Metamaterial," ETRI J., vol. 34, no. 1, Feb. 2012, pp. 126-129. https://doi.org/10.4218/etrij.12.0211.0081
  5. R.T. Johnk et al., "Time-Domain Measurements of the Electromagnetic Backscatter of Pyramidal Absorbers and Metallic Plates," IEEE Trans. Electromagn. Compat., vol. 35, no. 4, Nov. 1993, pp. 429-433. https://doi.org/10.1109/15.247855
  6. Agilent Technologies, Agilent Time Domain Analysis Using a Network Analyzer, Application Note 1287-12, May 2012.
  7. S.-S. Oh and Y.-H. Lee, "Evaluation Method of Absorber Reflectivity Using Antenna with High Reflection Coefficient," Proc. ISAPE, 2012, pp. 830-832.
  8. R.E. Collin, Foundations for Microwave Engineering, New York: McGraw-Hill, 1992.
  9. D.M. Pozar, Microwave Engineering, New York: Wiley & Sons, Inc., 1998.

Cited by

  1. Design of an Optical Transparent Absorber and Defect Diagnostics Analysis Based on Near-Field Measurement vol.21, pp.9, 2021, https://doi.org/10.3390/s21093076