Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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By F.-Y. Meng, R.-Z. Liu, K. Zhang, D. Erni, Q. Wu, L. Sun, and J. L.-W. Li

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A broadband gradient index (GRIN) metamaterial lens for gain enhancement of circularly polarized antennas has been automatically designed, fabricated and investigated. The GRIN metamaterial lens consists of an isotropic dielectric plate with a corresponding distribution of deep-subwavelength drill holes each with the same diameter. Such drill holes have a negligible influence on both the polarization state and the spectral response of the electromagnetic wave transmitting through the resulting GRIN metamaterial lens. Therefore, the GRIN metamaterial lens is polarization-insensitive and can efficiently transform spherical waves into planar waves over a very broad frequency range keeping the initial polarization states (e.g. linear or circular) scarcely changed. In the following we have derived analytical formulas that enable the setup of distribution rules for the drill holes on the plate. Based on these formulas, the GRIN metamaterial lens can be automatically designed and easily fabricated using circuit board engraving machines. The proposed GRIN metamaterial lens has been tested by placing it on the aperture of a circularly polarized conical horn antenna. The agreement between simulation and measurement results shows that the gain of the horn antenna has been significantly increased within the whole X-band (i.e. from 8 GHz to 12 GHz) and the largest gain enhancement reaches up to 5.7 dB. In particular, the axial ratio of the horn antenna with the GRIN metamaterial lens is less than 1.6 dB.

F.-Y. Meng, R.-Z. Liu, K. Zhang, D. Erni, Q. Wu, L. Sun, and J. L.-W. Li, "Automatic Design of Broadband Gradient Index Metamaterial Lens for Gain Enhancement of Circularly Polarized Antennas," Progress In Electromagnetics Research, Vol. 141, 17-32, 2013.

1. Kock, W. E., "Metal-lens antennas," Proceedings of the IRE, Vol. 34, 828-836, 1946.

2. Yaokun, Q., "Dielectric lens antenna with scan reflector," IEEE Transactions on Aerospace and Electronic Systems, Vol. 33, 98-101, 1997.

3. Free, W., F. Cain, C. Ryan, Jr., C. Burns, and E. Turner, "High-power constant-index lens antennas," IEEE Transactions on Antennas and Propagation, Vol. 22, 582-584, 1974.

4. Tang, C., "A dual lens antenna for limited electronic scanning," IEEE Antennas and Propagation Society International Symposium, 117-120, Urbana, IL, 1975.

5. Olver, A. D. and B. Philips, "Integrated lens with dielectric horn antenna," Electronics Letters, Vol. 29, 1150-1152, 1993.

6. Pavacic, A. P., D. L. del Rio, J. R. Mosig, and G. V. Eleftheriades, "Three-dimensional ray-tracing to model internal reflections in off-axis lens antennas," IEEE Transactions on Antennas and Propagation, Vol. 54, 604-612, 2006.

7. Abella, C., et al., "Artificial dielectric lens antennas: Assessment of their potential for space applications," 23rd European Microwave Conference, 896-898, Madrid, Spain, 1993.

8. Al-Joumayly, M. A. and N. Behdad, "Wideband planar microwave lenses using sub-wavelength spatial phase shifters," IEEE Transactions on Antennas and Propagation, Vol. 59, 4542-4552, 2011.

9. Pendry, J. B., A. J. Holden, D. J. Robbins, and W. J. Stewart, "Magnetism from conductors and enhanced nonlinear phenomena," IEEE Transactions on Microwave Theory and Techniques, Vol. 47, 2075-2084, Nov. 1999.

10. Shelby, R. A., D. R. Smith, and S. Schultz, "Experimental verification of a negative index of refraction," Science, Vol. 292, 77-79, Apr. 2001.

11. Enoch, S., G. Tayeb, P. Sabouroux, N. Guerin, and P. Vincent, "A metamaterial for directive emission," Physical Review Letters, Vol. 89, 213902(4), 2002.

12. Wu, Q., P. Pan, F. Y. Meng, L. W. Li, and J. Wu, "A novel flat lens horn antenna designed based on zero refraction principle of metamaterials," Applied Physics A - Materials Science and Processing, Vol. 87, 151-156, 2007.

13. Zhou, B., H. Li, X. Y. Zou, and T. J. Cui, "Broadband and high-gain planar Vivaldi antennas based on inhomogeneous anisotropic zero-index metamaterials," Progress In Electromagnetics Research, Vol. 120, 235-247, 2011.

14. Smith, D. R., J. J. Mock, A. F. Starr, and D. Schurig, "Gradient index metamaterials," Physical Review E, Vol. 71, Mar. 2005.

15. Driscoll, T., et al., "Free-space microwave focusing by a negative-index gradient lens," Applied Physics Letters, Vol. 88, 081101(3), 2006.

16. Goldflam, M. D., et al., "Reconfigurable gradient index using VO2 memory metamaterials," Applied Physics Letters, Vol. 99, 044103(3), Jul. 25, 2011.

17. Paul, O., B. Reinhard, B. Krolla, R. Beigang, and M. Rahm, "Gradient index metamaterial based on slot elements," Applied Physics Letters, Vol. 96, 241110(3), Jun. 14, 2010.

18. Ruopeng, L., C. Qiang, J. Y. Chin, J. J. Mock, C. Tie Jun, and D. R. Smith, "Broadband gradient index microwave quasioptical elements based on non-resonant metamaterials," Optics Express, Vol. 17, 21030-21041, 2009.

19. Ruopeng, L., Y. Xin Mi, J. G. Gollub, J. J. Mock, C. Tie Jun, and D. R. Smith, "Gradient index circuit by waveguided metamaterials," Applied Physics Letters, Vol. 94, 073506(3), Feb. 16, 2009.

20. Smith, D. R., Y.-J. Tsai, and S. Larouche, "Analysis of a gradient index metamaterial blazed diffraction grating," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 1605-1608, 2011.

21. Yang, X. M., X. Y. Zhou, Q. Cheng, H. F. Ma, and T. J. Cui, "Diffuse reflections by randomly gradient index metamaterials," Optics Letters, Vol. 35, 808-810, Mar. 15, 2010.

22. Liu, Z.-G., R. Qiang, and Z.-X. Cao, "A novel broadband Fabry-Perot resonator antenna with gradient index metamaterial superstrate," IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting, 1-4, Toronto, 2010.

23. Lei, M. Z. and C. T. Jun, "Experimental realization of a broadband bend structure using gradient index metamaterials," Optics Express, Vol. 17, 18354-18363, Sep. 28, 2009.

24. Chen, X., H. F. Ma, X. Y. Zou, W. X. Jiang, and T. J. Cui, "Three-dimensional broadband and high-directivity lens antenna made of metamaterials," Journal of Applied Physics, Vol. 110, 044904(8), Aug. 15, 2011.

25. Ma, H. F., X. Chen, H. S. Xu, X. M. Yang, W. X. Jiang, and T. J. Cui, "Experiments on high-performance beam-scanning antennas made of gradient-index metamaterials," Applied Physics Letters, Vol. 95, 094107(3), Aug. 31, 2009.

26. Mei, Z. L., J. Bai, and T. J. Cui, "Gradient index metamaterials realized by drilling hole arrays," Journal of Physics D - Applied Physics, Vol. 43, 055404(6), Feb. 10, 2010.

27. Ma, H. F. and T. J. Cui, "Three-dimensional broadband and broad-angle transformation-optics lens," Nature Communications, Vol. 1, 124(6), Nov. 2010.

28. Zhou, B., Y. Yang, H. Li, and T. J. Cui, "Beam-steering Vivaldi antenna based on partial Luneburg lens constructed with composite materials," Journal of Applied Physics, Vol. 110, 084908(6), 2011.

29. Ma, H. F. and T. J. Cui, "Three-dimensional broadband ground-plane cloak made of metamaterials," Nature Communications, Vol. 1, 21(6), 06/01/online, 2010.

30. Liu, Z. J., S. W. Yang, and Z. P. Nie, "A dielectric lens antenna design by using the effective medium theories," International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), 1-4, Chendu, China, 2010.

31. Petosa, A., A. Ittipiboon, and S. Thirakoune, "Investigation on arrays of perforated dielectric fresnel lenses," IEE Proceedings Microwaves, Antennas and Propagation, Vol. 153, 270-276, 2006.

32. Teshirogi, T. and T. Yoneyama, Modern Millimeter-wave Technologies, IOS Press, Burke, VA, USA, 2001.

33. Artemenko, A., A. Mozharovskiy, A. Maltsev, R. Maslennikov,A. Sevastyanov, and V. Ssorin , "2D electronically beam steerable integrated lens antennas for mm-wave applications," 42nd European Microwave Conference (EuMC), 213-216, Amsterdam, the Netherlands, 2012.

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