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THE UNIFIED THEORY OF NEAR-FIELD-FAR-FIELD TRANSFORMATIONS WITH SPIRAL SCANNINGS FOR NONSPHERICAL ANTENNAS

By F. D'Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, and M. Migliozzi

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Abstract:
The unified theory of near-field-far-field transformation techniques with spiral scannings for quasi-spherical antennas is extended in this paper to the case of nonspherical ones, i.e., antennas with two dimensions very different from the third one. To this end, such a kind of antennas is no longer considered as enclosed in a sphere, but in a proper convex domain bounded by a rotational surface. The extension, heuristically derived by paralleling the rigorous procedure valid when adopting the spherical source modelling, allows the overcoming of its main and serious drawbacks. In fact, the corresponding near-field-far-field transformations with spiral scannings for nonspherical antennas make use of a reduced number of near-field measurements and, above all, allow one to consider measurement surfaces at a distance smaller than one half the antenna maximum size, thus remarkably reducing the error related to the truncation of the scanning zone. These are very important features, which make the spiral scannings more and more appealing from the practical viewpoint. Some examples of the application of this theory to spirals wrapping the conventional scanning surfaces employed in the near-field-far-field transformations are reported for various source modellings, and the accuracy and robustness of the far-field reconstructions are assessed.

Citation:
F. D'Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, and M. Migliozzi, "The unified theory of near-field-far-field transformations with spiral scannings for nonspherical antennas," Progress In Electromagnetics Research B, Vol. 14, 449-477, 2009.
doi:10.2528/PIERB09031808
http://www.jpier.org/pierb/pier.php?paper=09031808

References:
1. Yaghjian, A. D., "An overview of near-field antenna measurements," IEEE Trans. Antennas Propagat., Vol. 34, 30-45, Jan. 1986.
doi:10.1109/TAP.1986.1143727

2., "Special issue on near-field scanning techniques," IEEE Trans. Antennas Propagat., Vol. 36, 727-901, 1988.
doi:10.1109/8.1173

3. Gennarelli, C., G. Riccio, F. D'Agostino, and F. Ferrara, Near-Field–Far-Field Transformation Techniques, Vol. 1, CUES, Salerno, Italy, 2004.

4. Bucci, O. M. and G. Franceschetti, "On the spatial bandwidth of scattered fields," IEEE Trans. Antennas Propagat., Vol. 35, 1445-1455, Dec. 1987.
doi:10.1109/TAP.1987.1144024

5. Bucci, O. M., C. Gennarelli, and C. Savarese, "Representation of electromagnetic fields over arbitrary surfaces by a finite and nonredundant number of samples," IEEE Trans. Antennas Propagat., Vol. 46, 351-359, Mar. 1998.
doi:10.1109/8.662654

6. Gennarelli, C., G. Riccio, V. Speranza, and C. Savarese, "Fast and accurate interpolation of radiated fields over a cylinder," Progress In Electromagnetics Research, Vol. 8, 349-375, 1994.

7. 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

8. Bucci, O. M., C. Gennarelli, G. Riccio, and C. Savarese, "Near-field-far-field transformation from nonredundant planepolar data: Effective modellings of the source," IEE Proc. --- Microw., Antennas Propagat., Vol. 145, 33-38, 1998.
doi:10.1049/ip-map:19981567

9. Bucci, O. M., F. D'Agostino, C. Gennarelli, G. Riccio, F. D'Agostino, C. Gennarelli, and G. Riccio, "NF-FF transformation with plane-polar scanning: Ellipsoidal modelling of the antenna," Automatika, Vol. 41, 159-164, 2000.

10. Bucci, O. M., C. Gennarelli, G. Riccio, and C. Savarese, "NF-FF transformation with cylindrical scanning: An effective technique for elongated antennas," IEE Proc. --- Microw., Antennas Propagat., Vol. 145, 369-374, Oct. 1998.

11. D'Agostino, F., F. Ferrara, C. Gennarelli, G. Riccio, and C. Savarese, "NF-FF transformation with cylindrical scanning from a minimum number of data," Microw. Opt. Technol. Lett., Vol. 35, 264-270, Nov. 2002.

12. Bucci, O. M., F. D'Agostino, C. Gennarelli, G. Riccio, and C. Savarese, "Data reduction in the NF-FF transformation technique with spherical scanning," Journal of Electromagnetic Waves and Applications, Vol. 15, 755-775, 2001.
doi:10.1163/156939301X00995

13. Bolomey, J. C., et al., "Rapid near-field antenna testing via array of modulated scattering probes," IEEE Trans. Antennas Propagat., Vol. 36, 804-814, Jun. 1988.
doi:10.1109/8.1182

14. Yaccarino, R. G., L. I. Williams, and Y. Rahmat-Samii, "Linear spiral sampling for the bipolar planar antenna measurement technique," IEEE Trans. Antennas Propagat., Vol. 44, 1049-1051, Jul. 1996.

15. Bucci, O. M., C. Gennarelli, G. Riccio, and C. Savarese, "Nonredundant NF-FF transformation with helicoidal scanning," Journal of Electromagnetic Waves and Applications, Vol. 15, 1507-1519, 2001.
doi:10.1163/156939301X00076

16. Bucci, O. M., F. D'Agostino, C. Gennarelli, G. Riccio, and C. Savarese, "Probe compensated FF reconstruction by NF planar spiral scanning," IEE Proc. --- Microw., Antennas Propagat., Vol. 149, 119-123, Apr. 2002.
doi:10.1049/ip-map:20020265

17. Bucci, O. M., F. D'Agostino, C. Gennarelli, G. Riccio, and C. Savarese, "NF-FF transformation with spherical spiral scanning," IEEE Antennas Wireless Propagat. Lett., Vol. 2, 263-266, 2003.
doi:10.1109/LAWP.2003.820710

18. D'Agostino, F., F. Ferrara, C. Gennarelli, G. Riccio, and C. Savarese, "Directivity computation by spherical spiral scanning in NF region," Journal of Electromagnetic Waves and Applications, Vol. 19, 1343-1358, 2005.
doi:10.1163/156939305775525927

19. D'Agostinov, F., C. Gennarelli, G. Riccio, and C. Savarese, "Theoretical foundations of near-field-far-field transformations with spiral scannings," Progress In Electromagnetics Research, Vol. 61, 193-214, 2006.
doi:10.2528/PIER06021401

20. Costanzo, S. and G. Di Massa, "Near-field to far-field transformation with planar spiral scanning," Progress In Electromagnetics Research, Vol. 73, 49-59, 2007.
doi:10.2528/PIER07031903

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. Bucci, O. M., G. D'Elia, and M. D. Migliore, "Advanced field interpolation from plane-polar samples: Experimental verification," IEEE Trans. Antennas Propagat., Vol. 46, 204-210, Feb. 1998.
doi:10.1109/8.660964

23. Ricciardi, G. F. and W. L. Stutzman, "A near-field to far-field transformation for spheroidal geometry utilizing an eigenfunction expansion," IEEE Trans. Antennas Propagat., Vol. 52, 3337-3349, Dec. 2004.
doi:10.1109/TAP.2004.836445

24. D'Agostino, F., F. Ferrara, C. Gennarelli, R. Guerriero, and M. Migliozzi, "An effective NF-FF transformation technique with planar spiral scanning tailored for quasi-planar antennas," IEEE Trans. Antennas Propagat., Vol. 56, 2981-2987, Sep. 2008.
doi:10.1109/TAP.2008.928786

25. Paris, D. T., W. M. Leach, Jr., and E. B. Joy, "Basic theory of probe-compensated near-field measurements," IEEE Trans. Antennas Propagat., Vol. 26, 373-379, May 1978.
doi:10.1109/TAP.1978.1141855

26. D'Agostino, F., F. Ferrara, C. Gennarelli, R. Guerriero, and M. Migliozzi, "Near-field-far-field transformation technique with helicoidal scanning for elongated antennas," Progress In Electromagnetics Research B, Vol. 4, 249-261, 2008.
doi:10.2528/PIERB08011503

27. D'Agostino, F., F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi, and G. Riccio, "NF-FF Transformation with helicoidal scanning: An effective source modelling for elongated antennas," Int. Jour. of Microw. Opt. Technol., Vol. 3, 275-282, Jul. 2008.

28. Leach, W. M., Jr., and D. T. Paris, "Probe compensated NF measurements on a cylinder," IEEE Trans. Antennas Propagat., Vol. 21, 435-445, Jul. 1973.

29. D'Agostino , F., F. Ferrara, C. Gennarelli, R. Guerriero, J. A. Fordham, M. Migliozzi, and C. Rizzo, "Experimental validation of the NF-FF transformation with helicoidal scanning suitable for elongated antennas," Proc. of AMTA 2008, 304-308, Nov. 2008.

30. D'Agostino, F., F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi, and G. Riccio, "A nonredundant near-field to farfield transformation with spherical spiral scanning for nonspherical antennas," The Open Electrical & Electronic Eng. Jour., Vol. 3, 4-11, 2009.

31. Hansen, J. E. (ed.), Spherical Near-Field Antenna Measurements, IEE Electromagnetic Waves Series, Peter Peregrinus, London, UK, 1998.


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