volume | PIER Journals

Abstract

In this paper, a detached zero index metamaterial lens (ZIML) consisting of metal strips and modified split ring resonators (MSRRs) is proposed for antenna gain enhancement. The effective permittivity and permeability of the detached ZIML are designed to synchronously approach zero, which leads the ZIML to having an effective wave impedance matching with air and near-zero index simultaneously. As a result, neither does the detached ZIML need to be embedded in horns aperture nor depends on auxiliary reflectors in enhancing antenna gain, which is quite different from conventional ZIMLs. Moreover, the distance between antenna and the detached ZIML slightly affect the gain enhancement, which further confirms that the ZIML can be detached from antennas. Simulated results show that the effective refractive index of the detached ZIML is near zero in a broad frequency range where the effective relative wave impedance is close to 1. The detached ZIML is fabricated and tested by placing it in front of an H-plane horn antenna. One finds that evident gain enhancement is obtained from 8.9 GHz to 10.8 GHz and the greatest gain enhancement reaches up to 4.02 dB. In addition, the detached ZIML can also work well at other frequencies by adjusting its geometric parameters to scale, which is demonstrated by designing and simulating two detached ZIMLs with center frequencies of 2.4 GHz and 5.8 GHz, respectively.

1. Pendry, J. B., "A chiral route to negative refraction," Science, Vol. 306, No. 5700, 1353-1355, 2004.
doi:10.1126/science.1104467 Google Scholar

2. Andres-Garcia, B., L. E. Garcia-Munoz, V. Gonzalez-Posadas, F. J. Herraiz-Martinez, and D. Segovia-Vargas, "Filtering lens structure based on SRRs in the low THz band," Progress In Electromagnetics Research, Vol. 93, 71-90, 2009.
doi:10.2528/PIER09040105 Google Scholar

3. Huang, L. and H. Chen, "Multi-band and polarization insensitive metamaterial absorber," Progress In Electromagnetics Research, Vol. 113, 103-110, 2011. Google Scholar

4. Pendry, J. B., "Negative refraction makes a perfect lens," Physical Review Letters, Vol. 85, No. 18, 3966-3969, 2000.
doi:10.1103/PhysRevLett.85.3966 Google Scholar

5. Chen, H., B. Hou, S. Chen, X. Ao, W. Wen, and C. T. Chan, "Design and experimental realization of a broadband transformation media field rotator at microwave frequencies," Physical Review Letters, Vol. 102, No. 18, 183903(3), 2009.
doi:10.1103/PhysRevLett.102.183903 Google Scholar

6. Lim, C. C. S. and T. Itoh, "A reflecto-directive system using a composite right/left-handed (CRLH) leaky-wave antenna and hetero-dyne mixing," IEEE Microwave and Wireless Components Letters, Vol. 14, No. 4, 183-185, 2004.
doi:10.1109/LMWC.2004.827107 Google Scholar

7. Attia, H., M. M. Bait-Suwailam, O. M. Ramahi, and A. Electromagnet, "Enhanced gain planar inverted-F antenna with metamaterial superstrate for UMTS applications," PIERS Online, Vol. 6, No. 6, 585-588, 2010.
doi:10.2529/PIERS100422003051 Google Scholar

8. Bahrami, H., M. Hakkak, and A. Pirhadi, "Analysis and design of highly compact bandpass waveguide filter utilizing complementary split ring resonators (CSRR)," Progress In Electromagnetics Research, Vol. 80, 107-122, 2008. Google Scholar

9. Enoch, S., G. Tayeb, P. Sabouroux, N. Guerin, and P. Vincent, "A metamaterial for directive emission," Physical Review Letters, Vol. 89, No. 21, 213902:1-4, 2002.
doi:10.1103/PhysRevLett.89.213902 Google Scholar

10. Ziolkowski, R. W., "Propagation in and scattering from a matched metamaterial having a zero index of refraction," Physical Review E --- Statistical, Nonlinear, and Soft Matter Physics, Vol. 70, No. 42, 046608-1, 2004. Google Scholar

11. Wu, Q., P. Pan, F.-Y. Meng, L.-W. Li, and J. Wu, "A novel °at lens horn antenna designed based on zero refraction principle of metamaterials," Applied Physics A --- Materials Science and Processing, Vol. 87, No. 2, 151-156, 2007.
doi:10.1007/s00339-006-3820-9 Google Scholar

12. Xiao, Z. and H. Xu, "Low refractive metamaterials for gain enhancement of horn antenna," Journal of Infrared Millimeter and Terahertz Waves, Vol. 30, 225-232, 2009.
doi:10.1007/s10762-008-9449-3 Google Scholar

13. Kim, D. and J. Choi, "Analysis of antenna gain enhancement with a new planar metamaterial superstrate: An effective medium and a Fabry-Pérot resonance approach ," Journal of Infrared Millimeter and Terahertz Waves, Vol. 31, No. 11, 1289-1303, 2010.
doi:10.1007/s10762-010-9712-2 Google Scholar

14. Hrabar, S., D. Bonefacic, and D. Muha, "ENZ-based shortened horn antenna --- An experimental study," Antennas and Propagation Society International Symposium, 1-4, San Diego, CA, United States, 2008. Google Scholar

15. Ju, J., D. Kim, W. J. Lee, and J. I. Choi, "Wideband high-gain antenna using metamaterial superstrate with the zero refractive index," Microwave and Optical Technology Letters, Vol. 51, No. 8, 1973-1976, 2009.
doi:10.1002/mop.24469 Google Scholar

16. Cheng, Q. A., W. X. Jiang, and T. J. Cui, "Radiation of planar electromagnetic waves by a line source in anisotropic metamaterials," Journal of Physics D-Applied Physics, Vol. 43, No. 33, 335446(6), 2010.
doi:10.1088/0022-3727/43/33/335406 Google Scholar

17. Ma, Y. G., P. Wang, X. Chen, and C. K. Ong, "Near-field plane-wave-like beam emitting antenna fabricated by anisotropic metamaterial," Applied Physics Letters, Vol. 94, No. 4, 044107(3), 2009.
doi:10.1063/1.3077128 Google Scholar

18. Jiang, Z. H. and D. H. Werner, "Anisotropic metamaterial lens with a monopole feed for high-gain multi-beam radiation," 2011 IEEE International Symposium on Antennas and Propagation, 1346-1349, 2011. Google Scholar

19. Weng, Z. B., Y. C. Jiao, G. Zhao, and F. S. Zhang, "Design and experiment of one dimension and two dimension metamaterial structures for directive emission," Progress In Electromagnetics Research, Vol. 70, 199-209, 2007.
doi:10.2528/PIER07010301 Google Scholar

20. Weng, Z. B., X. M. Wang, Y. Song, Y. C. Jiao, and F. S. Zhang, "A directive patch antenna with arbitrary ring aperture lattice metamaterial structure," Journal of Electromagnetic Waves and Applications, Vol. 22, No. 8-9, 1283-1291, 2008.
doi:10.1163/156939308784158670 Google Scholar

21. Sauleau, R., P. Coquet, T. Matsui, and J. P. Daniel, "A new concept of focusing antennas using plane-parallel Fabry-Pérot cavities with nonuniform mirrors, ," IEEE Transactions on Antennas and Propagation, Vol. 51, No. 11, 3171-3175, 2003.
doi:10.1109/TAP.2003.818795 Google Scholar

22. Smith, D. R., S. Schultz, S. L. McCall, and P. M. Platzmann, "Defect studies in a 2-dimensional periodic photonic lattice," Journal of Modern Optics, Vol. 41, No. 2, 395-404, 1994.
doi:10.1080/09500349414550401 Google Scholar

23. Kaklamani, D. I., "Full-wave analysis of a Fabry-Pérot type resonator," Journal of Electromagnetic Waves and Applications, Vol. 13, No. 12, 1627-1634, 1999.
doi:10.1163/156939399X00024 Google Scholar

24. 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. Google Scholar

25. Wu, Q., J. P. Turpin, D. H. Werner, and E. Lier, "Thin metamaterial lens for directive radiation," 2011 IEEE International Symposium on Antennas and Propagation, 2886-2889, Spokane, WA, 2011. Google Scholar

26. Turpin, J. P., Q. Wu, D. H. Werner, E. Lier, B. Martin, and M. Bray, "Anisotropic metamaterial realization of a flat gain-enhancing lens for antenna applications," 2011 IEEE International Symposium on Antennas and Propagation, 2882-2885, 2011. Google Scholar

27. Mei, Z. L., J. Bai, T. M. Niu, and T. J. Cui, "A half Maxwell fish-eye lens antenna based on gradient-index metamaterials," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 1, 398-401, 2012.
doi:10.1109/TAP.2011.2167914 Google Scholar

28. Zhang, Y., R. Mittra, and W. Hong, "On the synthesis of a °at lens using a wideband low-refraction gradient-index metamaterial," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 16, 2178-2187, 2011.
doi:10.1163/156939311798147015 Google Scholar

29. Neu, J., B. Krolla, O. Paul, B. Reinhard, R. Beigang, and M. Rahm, "Metamaterial-based gradient index lens with strong focusing in the THz frequency range," Optics Express, Vol. 18, No. 26, 27748-27757, 2010.
doi:10.1364/OE.18.027748 Google Scholar

30. Pendry, J. B., A. J. Holden, W. J. Stewart, and I. Youngs, "Extremely low frequency plasmons in metallic mesostructures," Physical Review Letters, Vol. 76, No. 25, 4773-4776, 1996.
doi:10.1103/PhysRevLett.76.4773 Google Scholar

31. Tang, Q., F.-Y. Meng, Q. Wu, and J.-C. Lee, "A balanced composite backward and forward compact waveguide based on resonant metamaterials," Journal of Applied Physics, Vol. 109, No. 7, 07A319(3), 2011. Google Scholar

32. Meng, F.-Y., Q. Wu, D. Erni, and L.-W. Li, "Controllable metamaterial-loaded waveguides supporting backward and forward waves," IEEE Transactions on Antennas and Propagation, Vol. 59, No. 9, 3400-3411, 2011.
doi:10.1109/TAP.2011.2161540 Google Scholar

33. Ziolkowski, R. W., "Design, fabrication, and testing of double negative metamaterials," IEEE Transactions on Antennas and Propagation, Vol. 51, No. 7, 1516-1529, 2003.
doi:10.1109/TAP.2003.813622 Google Scholar

34. Goncharenko, A. V. and K. R. Chen, "Strategy for designing epsilon-near-zero nanostructured metamaterials over a frequency range," Journal of Nanophotonics, Vol. 4, No. 1, 041530, 2010.
doi:10.1117/1.3332833 Google Scholar

35. Hrabar, S., I. Krois, I. Bonic, and A. Kiricenko, "Negative capacitor paves the way to ultra-broadband metamaterials," Applied Physics Letters, Vol. 99, No. 25, 254103(3), 2011.
doi:10.1063/1.3671366 Google Scholar

36. Sun, L. and K. W. Yu, "Strategy for designing broadband epsilon-near-zero metamaterial with loss compensation by gain media," Applied Physics Letters, Vol. 100, No. 26, 261903(3), 2012.
doi:10.1063/1.4730380 Google Scholar

Dr. Fan-Yi Meng

Dr. Yue-Long Lyu

Prof. Kuang Zhang

Dr. Qun Wu

Prof. Joshua Le-Wei Li