Derivation of Far-field Gain Using a Gain Reduction Effect in the Fresnel Region

Authors

  • Ilkyu Kim C4I Team Defense Agency for Technology and Quality, Daejeon, 35409, Republic of Korea
  • Sun-Gyu Lee Department of Electronics and Electrical Engineering Hongik University, Seoul, 04066, Republic of Korea
  • Jeong-Hae Lee Department of Electronics and Electrical Engineering Hongik University, Seoul, 04066, Republic of Korea

Keywords:

Fresnel region, gain reduction effect, phaseless near-field measurement

Abstract

A handy method of calculating far-field gain based on the magnitude of the power transmission in a Fresnel region is presented, which can be applied to the phaseless near-field measurement. Due to the short range inside an anechoic chamber, the probe antenna is often placed in the Fresnel region of the antenna under test (AUT). It is well-known that far-field gain of an antenna gradually reduces when one antenna moves to the other one placed in a proximity distance. This fact can be advantageously applied to estimate the far-field gain in a far-field region. The proposed method offers rapid estimation of the far-field gain based on the simple input knowledge such as the probe antenna gain and the magnitude of the power transmission and the separation distance between AUT and probe antenna. The proposed method can be applicable to a wide range of microwave antennas. This feature makes it possible to offer preliminary measurement results and reference parameters of the measurement for the various types of microwave antennas.

Downloads

Download data is not yet available.

Author Biographies

Ilkyu Kim, C4I Team Defense Agency for Technology and Quality, Daejeon, 35409, Republic of Korea

Ilkyu Kim received his B.S. degree in Electrical Engineering from Hongik University, Seoul, South Korea in 2003 and the M.S. degree in Electrical Engineering from University of Southern California, Los Angeles, CA in 2006 and Ph.D. degrees in Electrical Engineering from University of California at Los Angeles in 2012. He was with Samsung Advanced Institute of Technology from 2006 to 2008. After gaining his Ph.D. degree, he joined in Defense Agency for Technology Quality, Daejeon, South Korea, where he is currently working as a senior research engineer in the area of radar and space applications. His research interests include but not limited to computation of electromagnetic mutual coupling, antenna measurement, and antenna design for space and radar applications.

Sun-Gyu Lee, Department of Electronics and Electrical Engineering Hongik University, Seoul, 04066, Republic of Korea

Sun-Gyu Lee received B.S. and M.S. degrees in Electronic and Electrical Engineering from Hongik University in Seoul, Republic of Korea in 2016 and 2018, respectively. He is currently working toward a Ph.D. degree at the same institution. His research interests include phased array antennas and metasurfaces.

Jeong-Hae Lee, Department of Electronics and Electrical Engineering Hongik University, Seoul, 04066, Republic of Korea

Jeong-Hae Lee received B.S. and M.S. degrees in Electrical Engineering from Seoul National University in Korea in 1985 and 1988, respectively, and a Ph.D. degree in Electrical Engineering from the University of California, LA in 1996. From 1993 to 1996, he was a Visiting Scientist of General Atomics in San Diego, CA, where his major research initiatives were developing a millimeter-wave diagnostic system and studying plasma wave propagation. Since 1996, he has been working at Hongik University in Seoul, Korea as a Professor in the Department of Electronic and Electrical Engineering. He has more than 100 papers published in journals and 60 patents. He was a president of the Korea Institute of Electromagnetic Engineering and Science in 2019. He is currently a Director of the Metamaterial Electronic Device Center. His current research interests include metamaterial radio frequency devices and wireless power transfer.

References

C. A. Balanis, Antenna Theory: Analysis and Design. 3rd ed., Wiley Interscience, 2005.

O. Borries, P. Meincke, E. Jørgensen, and, C. H. Schmidt, “Design and validation of compact antenna test ranges using computational EM,” Proc. AMTA 37th Annual Meeting, pp. 40-45, Oct. 2015.

A. D. Yaghjian, “An overview of near-field antenna measurements,” IEEE Trans. Antennas Propag., vol. 34, pp. 30-45, Jan. 1986.

R. G. Yaccarino and Y. Rahmat-Samii, “Phaseless bi-polar planar near-field measurements and diagnostics of array antennas,” IEEE Trans. Antennas Propag., vol. 47, no. 3, pp. 574-583, Mar. 1999.

S. F. Razavi and Y. Rahmat-Samii, “A new look at phaseless planar near-field measurements: limitations, simulations, measurements, and a hybrid solution,” IEEE Trans. Antennas Propag. Magazine, vol. 49, no. 2, pp. 170-178, Apr. 2007.

S. F. Razavi and Y. Rahmat-Samii, “On the uniqueness of planar near-field phaseless antenna measurements based on two amplitude-only measurements,” 2008 IEEE Int. Symp. on Antennas and Propag., July 5-11, 2008.

J. R. Pace, “Asymptotic formulas for coupling between two antennas in the Fresnel region,” IEEE Trans. Antennas Propag., AP-17, no. 3, pp. 285- 291, 1969.

T. S. Chu, “An approximate generalization of the Friis transmission formula,” Proc. IEEE, pp. 296- 297, Mar. 1965.

Y. Kim, S. Boo, G. Kim, N. Kim, and B. Lee, “Wireless power transfer efficiency formula applicable in near and far fields,” Journal of Electromagn. Eng. Sci., vol. 19, no. 4, pp. 239-244, Oct. 2019.

I. Kim, S. Xu, and Y. Rahmat-Samii, “Generalised correction to the Friis formula: Quick determination of the coupling in the Fresnel region,” IET Microw. Antennas and Propag., vol. 7, no. 13, pp. 1092- 1101, Oct. 2013.

I. Kim and S. Lee, “Estimation of the maximum directivity of the antennas using the mutual coupling between two antennas,” 2018 Int. Symp. on Antennas and Propag.(ISAP), Oct. 23-26. 2018.

I. Kim, C. Lee and J. Lee, “On computing the mutual coupling between two antennas,” IEEE Trans. Antennas Propag., doi:10.1109/TAP.2020. 2989899.

M. R. Spiegel, Mathematical Handbook of Formulas and Tables, 5th ed., New Jersey, McGraw-Hill Education, 2017.

Downloads

Published

2020-10-01

How to Cite

[1]
Ilkyu Kim, Sun-Gyu Lee, and Jeong-Hae Lee, “Derivation of Far-field Gain Using a Gain Reduction Effect in the Fresnel Region”, ACES Journal, vol. 35, no. 10, pp. 1137–1143, Oct. 2020.

Issue

2020: Vol 35 Iss 10

Section

Articles