volume | PIER Journals

Abstract

The measurement of the field radiated from an antenna placed above a finite ground plane experiences the effects of the field scattered by the edges of the ground plane. A new numerical method to remove these effects from measured data is presented here. It resorts to the image theorem and can be used for both near-field and far-field measurements. A simple and effective algorithm has been developed to apply that method to fields described by means of spherical wave expansion. A numerical validation shows the effectiveness of the method.

1. Cui, B., J. Zhang, and X.-W. Sun, "Single layer microstrip antenna arrays applied in millimiter-wave radar front-end," Journal Electromagnetic Waves and Applications, Vol. 22, No. 1, 3-15, 2008.
doi:10.1163/156939308783122797

2. Cui, B., C. Wang, and X.-W. Sun, "Microstrip array double-antenna (MADA) technology applied in millimeter wave compact radar front-end," Progress In Electromagnetics Research, Vol. 66, 125-136, 2006.
doi:10.2528/PIER06110902

3. Yuan, N., X.-C. Nie, Y.-B. Gan, and T. S. Yeo, "Accurate analysis of conformal antenna arrays with finite and curved frequency selective surfaces," Journal Electromagnetic Waves and Applications, Vol. 21, No. 13, 1745-1760, 2007.

4. Hussein, K. A., "Efficient near-field computation for radiation and scattering from conducting surfaces of arbitrary shape," Progress In Electromagnetics Research, Vol. 69, 267-285, 2007.
doi:10.2528/PIER07010302

5. Ouyang, J., F. Yang, S. W. Yang, and Z. P. Nie, "Exact simulation method VSWIE+MLFMA for analysis radiation pattern of probe-feed conformal microstrip antennas and the application of synthesis radiation pattern of conformal array mounted on finitelength PEC circular cylinder with DES," Journal Electromagnetic Waves and Applications, Vol. 21, No. 14, 1995-2008, 2007.
doi:10.1163/156939307783152803

6. Akdagli, A., "An empirical expression for the edge extension in calculating resonant frequency of rectangular microstrip antennas with thin and thick substrates," Journal Electromagnetic Waves and Applications, Vol. 21, No. 9, 1247-1255, 2007.

7. Gustafsson, M., "Surface integrated dipole arrays with tapered resistive edge sheets," Journal Electromagnetic Waves and Applications, Vol. 21, No. 6, 713-718, 2007.
doi:10.1163/156939307780749093

8. Gustafsson, M., "RCS reduction of integrated antenna arrays with resistive sheets," J. Electro. Waves Appl., Vol. 20, No. 1, 27-40, 2006.
doi:10.1163/156939306775777323

9. Yang, F., V. Demir, D. A. Elsherbeni, A. Z. Elsherbeni, and A. A. Eldek, "Enhancement of printed dipole antennas characteristics using semi-EBG ground plane," Journal Electromagnetic Waves and Applications, Vol. 20, No. 8, 993-1006, 2006.
doi:10.1163/156939306776930330

10. Ali, M. and S. Sanyal, "A numerical investigation of finite ground planes and reflector effects on monopole antenna factor," Journal Electromagnetic Waves and Applications, Vol. 21, No. 10, 1379-1392, 2007.
doi:10.1163/156939307783239410

11. Bhattacharyya, A. K., "Effects of finite ground plane on the radiation characteristics of a circular patch antenna," IEEE Trans. Antennas Propagat., Vol. 38, No. 2, 152-159, February 1990.
doi:10.1109/8.45116

12. Namiki, T., Y. Murayama, and K. Ito, "Improving radiationpattern distortion of a patch antenna having a finite ground plane," IEEE Trans. Antennas Propagat., Vol. 51, No. 3, 478-482, March 2003.
doi:10.1109/TAP.2003.809838

13. Williams, J. T., H. J. Delgado, and S. A. Long, "An antenna pattern measurement technique for eliminating the fields scattered from the edges of a finite ground plane," IEEE Trans. Antennas Propagat., Vol. 38, No. 11, 1815-1822, November 1990.
doi:10.1109/8.102744

14. Griffin, D. W., "Monopole Antenna method of diagnosing the effectiveness of ground plane edge scattering elimination technique," IEEE Antennas Propagat. Int. Symp. Dig., 223-226, May 1982.

15. Wang, R. W. and V. V. Liepa, "Reduction of the edge diffraction of a circular ground plane by using resistive edge loading," IEEE Antennas Propagat. Int. Symp. Dig., 769-771, June 1985.

16. Burrell, G. A. and A. R. Jiamieson, "Anennas radiation pattern measurement using time-to-frequency transformation (TFT) techniques," IEEE Trans. Antennas Propagat., Vol. 21, 702-704, September 1973.
doi:10.1109/TAP.1973.1140560

17. Clouston, E. N. and S. Evans, "Time-domain techiniques for the measurement of narrow-bandwidth antenna parameters," IEEE Antennas Propagat. Int. Symp. Dig., 308-311, June 1988.

18. Kouyoumjian, R. G. and P. H. Pathak, "A uniform geometrical theory of diffraction for an edge in a perfectly conducting surface," Proc. IEEE, Vol. 62, No. 11, 1448-1461, November 1974.
doi:10.1109/PROC.1974.9651

19. Yaghjian, A. D., "An overview of near-field antenna measurements," IEEE Trans. Antennas Propagat., Vol. AP-34, 30-45, Jan. 1986.

20. Costanzo, S. and G. Dimassa, "Direct far-field computation from bi-polar near-field samples," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 9, 1137-1148, 2006.
doi:10.1163/156939306777442926

21. Costanzo, S. and G. di Massa, "Far-field reconstruction from phaseless near-field data on a cylindrical helix," Journal of Electromagnetic Waves and Applications, Vol. 18, No. 8, 1057-1071, 2004.
doi:10.1163/1569393042955414

22. Ayestar, R. G. and F. Las-Heras, "Near field to far field transformation using neural networks and source reconstruction," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 15, 2201-2213, 2006.
doi:10.1163/156939306779322594

23. Koivisto, P. K. and J. C.-E. Sten, "On the in fluence of incomplete radiation pattern data on the accuracy of spherical wave expansion," Progress In Electromagnetics Research, Vol. 52, 185-204, 2005.
doi:10.2528/PIER04080902

24. Persson, K. and M. Gustafson, "Reconstruction of equivalent currents using a near-field data transformation with radome applications," Progress In Electromagnetics Research, Vol. 54, 179-198, 2005.
doi:10.2528/PIER04111602

25. Ferrara, F., C. Gennarelli, R. Guerriero, G. Riccio, and C. Savarese, "An efficient near-field to far-field transformation using the planar wide-mesh scanning," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 3, 341-357, 2007.
doi:10.1163/156939307779367404

26. Iversen, P. O., Ph. Garreau, and D. Burrell, "Real-time spherical near-field handset antenna measurements," IEEE Antennas and Propagations Magazine, Vol. 43, No. 3, 90-95, June 2001.
doi:10.1109/74.934906

27. Bolomey, J. C., B. J. Cown, G. Fine, L. Jofre, M. Mostafavi, D. Picard, J. P. Estrada, P. G. Friederich, and F. L. Cain, "Rapid near-field antenna testing via arrays of modulated scattering probes," IEEE Trans. Antennas Propagat., Vol. 36, No. 6, 804-814, June 1988.
doi:10.1109/8.1182

28. Laitinen, T. A., J. Ollikainen, C. Icheln, and P. Vainikainen, "Rapid spherical field measurement system for mobile terminal antennas," IEEE Instrumentation and Measurement Technology Conference (IMTC'03), 968-972, Vail, CO, USA, May 20-22, 2003.

29. Laitinen, T., J. Toivanen, C. Icheln, and P. Vainikainen, "Spherical measurement system for determination of complex radiation patterns of mobile terminals," Electron. Lett., Vol. 40, No. 22, 1392-1394, 2004.
doi:10.1049/el:20046767

30. Hansen, J. E., Spherical Near-Field Antenna Measurements, Peter Peregrinus, 1988.

31. "FEKO User's Manual, Suite 5.1," EMSoftware & Systems-S.A. (Pty) Ltd. [Online]. Available: http://feko.info, Stellenbosch, South Africa, December 2005.

Professor Emidio Di Giampaolo