Abstract

In this article, we present a compact and efficient diametrically-fed dual port fractal UWB MIMO antenna for portable handheld wireless devices. The electromagnetic behaviour on conducting body is analyzed through classical approach based characteristics mode analysis (CMA). Their intrinsic characteristics are explored on the basis of (a) modal surface current distributions, (b) narrow/broad bandwidth capability and (c) radiation potentials. Concurrent analysis is persuaded on diametrically-fed dual port fed fractal conducting surface, that provides interesting facets on the combinatory effect of electromagnetic performance and physical behaviour on metallic radiator, metallic ground planes (unconnected/connected) and combination of two aforementioned metallic compact geometries. Theoretical insights are investigated for essential/non-essential modes existing in proposed geometry. The investigation through CMA also gives plethoric information on the feed location of antenna on modal surface currents and similar trends to capture its radiation potentials on the current nulls existing in the physical body. A broad classification of modes is explained, covering the CMA modal dynamics such as (a) characteristics angle (CA), (b) eigen values (EV) and (c) modal significance (MS). These additive parameters in general reflect the resemblance of Q-factor≈B.W. for narrowband/wideband traits, electrically/magnetically coupled energy behaviour and radiative potential for far-field propagation. Thus, in a nut-shell, it can be inferred that `CMA provides physically intuitive guidance for the analysis and designing of antenna structures'. To support the findings highlighted in this particular study, a concise review about the theory of characteristic modes and the practical examples that use such concepts are taken into consideration.

1. Cabedo-Fabres, M., et al. "The theory of characteristic modes revisited: A contribution to the design of antennas for modern applications," IEEE Antennas and Propagation Magazine, Vol. 49, No. 5, 52-68, 2007.
doi:

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Google Scholar

2. Garbacz, R. J., "Modal expansions for resonance scattering phenomena," Proceedings of the IEEE, Vol. 53, No. 8, 856-864, 1965.
doi:The server didn't respond in time. Google Scholar

3. Garbacz, R. J., "A generalized expansion for radiated and scattered fields,", Ph.D. dissertation, Ohio State University, Columbus, Ohio, USA, 1968.
doi: Google Scholar

4. Garbacz, R. J. and R. H. Turpin, "A generalized expansion for radiated and scattered fields," IEEE Transactions on Antennas and Propagation, Vol. 19, No. 3, 348-358, 1971. Google Scholar

5. Harrington, R. and J. Mautz, "The theory of characteristic modes for conducting bodies," IEEE Transactions on Antennas and Propagation, Vol. 19, No. 5, 622-628, 1971. Google Scholar

6. Harrington, R. and J. Mautz, "Computation of characteristic modes for conducting bodies," IEEE Transactions on Antennas and Propagation, Vol. 19, No. 5, 629-639, 1971. Google Scholar

7. Li, W., et al. "Modal proportion analysis in antenna characteristic mode theory," International Journal of Antennas and Propagation, Article ID 7069230, 10 Pages, 2019. Google Scholar

8. Vogel, M., et al. "Characteristic mode analysis: Putting physics back into simulation," IEEE Antennas and Propagation Magazine, Vol. 57, No. 2, 307-317, 2015. Google Scholar

9. Harrington, R., J. Mautz, and J. Y. Chang, "The theory of characteristic modes for dielectric and magnetic bodies," IEEE Transactions and Antennas Propagation, Vol. 20, No. 2, 194-198, 1972. Google Scholar

10. Martens, R. and D. Manteuffel, "Systematic design method of a mobile multiple antenna system using the theory of characteristic modes," IET Microwaves, Antennas & Propagation, Vol. 8, No. 12, 887-893, 2014. Google Scholar

11. Zhao, X., S. P. Yeo, and L. C. Ong, "Planar UWB MIMO antenna with pattern diversity and isolation improvement for mobile platform based on the theory of characteristic modes," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 1, 420-425, 2017. Google Scholar

12. Singh, H. V. and S. Tripathi, "Compact UWB MIMO antenna with fork-shaped stub with Vias Based Coupling Current Steering (VBCCS) to Enhance Isolation Using CMA," AEU - International Journal of Electronics and Communications, Vol. 129, 153550, 2021. Google Scholar

13. Chen, Y. and C. F. Wang, "Electrically small UAV antenna design using characteristic modes," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 2, 535-545, 2014. Google Scholar

14. Harrington, R. and J. Mautz, "Control of radar scattering by reactive loading," IEEE Transactions on Antennas and Propagation, Vol. 20, No. 4, 446-454, 1972. Google Scholar

15. Mautz, J. and R. Harrington, "Modal analysis of loaded N-port scatterers," IEEE Transactions on Antennas and Propagation, Vol. 21, No. 2, 188-199, 1973. Google Scholar

16. Harrington, R. and J. Mautz, "Pattern synthesis for loaded N-port scatterers," IEEE Transactions on Antennas and Propagation, Vol. 22, No. 2, 184-190, 1974. Google Scholar

17. Harrington, R. and J. Mautz, "Optimization of radar cross section of N-port loaded scatterers," IEEE Transactions on Antennas and Propagation, Vol. 22, No. 5, 697-701, 1974. Google Scholar

18. Wang, Y., et al. "Hybrid technique of fast RCS computation with characteristic modes and AWE," IEEE Antennas and Wireless Propagation Letters, Vol. 6, 464-467, 2007. Google Scholar

19. Li, H., Z. T. Miers, and B. K. Lau, "Design of orthogonal MIMO handset antennas based on characteristic mode manipulation at frequency bands below 1 GHz," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 5, 2756-2766, 2014. Google Scholar

20. Li, H., et al. "Decoupling of multiple antennas in terminals with chassis excitation using polarization diversity, angle diversity and current control," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 12, 5947-5957, 2012. Google Scholar

21. Kishor, K. K. and S. V. Hum, "A pattern reconfigurable chassis mode MIMO antenna," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 6, 3290-3298, 2014. Google Scholar

22. Li, K. and Y. Shi, "Wideband MIMO handset antenna design based on theory of characteristic modes," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 28, No. 4, e21217, 2018. Google Scholar

23. Raheja, D. K., B. K. Kanaujia, and S. Kumar, "Low profile four-port super-wideband multiple-input-multiple-output antenna with triple band rejection characteristics," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 10, e21831, 2019. Google Scholar

24. Li, Y., et al. "Metal-frame-integrated eight-element multiple-input multiple-output antenna array in the long term evolution bands 41/42/43 for fifth generation smartphones," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 1, e21495, 2019. Google Scholar

25. Sahu, N. K., G. Das, and R. K. Gangwar, "L-shaped dielectric resonator based circularly polarized Multi-Input-Multi-Output (MIMO) antenna for Wireless Local Area Network (WLAN) application," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 28, No. 9, e21426, 2018. Google Scholar

26. Belazzoug, M., et al. "Ultra-compact 4-port DR antenna for multi-input multi-output standards," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 5, e22145, 2020. Google Scholar

27. Niu, B.-J. and J.-H. Tan, "Compact tri-band MIMO antenna based on quarter-mode slotted substrate-integrated-waveguide cavity," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 3, e22101, 2020. Google Scholar

28. Chattha, H. T., "Compact high isolation wideband 4G and 5G multi-input multi-output antenna system for handheld and internet of things applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 6, e21710, 2019. Google Scholar

29. Deng, J., J. Li, and L. Guo, "Decoupling of a three-port MIMO antenna with different impedances using reactively loaded dummy elements," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 3, 430-433, 2018. Google Scholar

30. Raheja, D. K., et al. "Compact four-port MIMO antenna on slotted-edge substrate with dual-band rejection characteristics," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 7, e21756, 2019. Google Scholar

31. Singh, H. V. and S. Tripathi, "Compact UWB MIMO antenna with cross-shaped unconnected ground stub using characteristic mode analysis," Microwave and Optical Technology Letters, Vol. 61, No. 7, 1874-1881, 2019. Google Scholar

32. Srivastava, K., et al. "A CPW-fed UWB MIMO antenna with integrated GSM band and dual band notches," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 1, e21433, 2019. Google Scholar

33. Kumar, N. and R. Khanna, "A compact multi-band multi-input multi-output antenna for 4G/5G and IoT devices using theory of characteristic modes," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 1, e22012, 2020. Google Scholar

34. Malviya, L., M. V. Karthikeyan, and R. K. Panigrahi, "Multi-standard, multi-band planar multiple input multiple output antenna with diversity effects for wireless applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 2, e21551, 2019. Google Scholar

35. Biswas, A. K. and U. Chakraborty, "A compact wide band textile MIMO antenna with very low mutual coupling for wearable applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 8, e21769, 2019. Google Scholar

36. Werner, D. H. and S. Ganguly, "An overview of fractal antenna engineering research," IEEE Antennas and Propagation Magazine, Vol. 45, No. 1, 38-57, 2003. Google Scholar

37. Rajkumar, S., et al. "A penta-band hybrid fractal MIMO antenna for ISM applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 28, No. 2, e21185, 2017. Google Scholar

38. Gurjar, R., et al. "A novel compact self-similar fractal UWB MIMO antenna," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 3, e21632, 2018. Google Scholar

39. Mohanty, A. and S. Sahu, "High isolation two-port compact MIMO fractal antenna with Wi-MAX and X-band suppression characteristics," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 1, e22021, 2020. Google Scholar

40. Luo, Y., Z. N. Chen, and K. Ma, "Enhanced bandwidth and directivity of a dual-mode compressed high-order mode stub-loaded dipole using characteristic mode analysis," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 3, 1922-1925, 2019. Google Scholar

41. Borchardt, J. J. and T. C. Lapointe, "U-slot patch antenna principle and design methodology using characteristic mode analysis and coupled mode theory," IEEE Access, Vol. 7, 109375-109385, 2019. Google Scholar

42. Luo, Y., Z. N. Chen, and K. Ma, "A single-layer dual-polarized differentially fed patch antenna with enhanced gain and bandwidth operating at dual compressed high-order modes using characteristic mode analysis," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 5, 4082-4087, 2020. Google Scholar

43. Kim, D. and S. Nam, "Mutual coupling compensation in receive-mode antenna array based on characteristic mode analysis," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 12, 7434-7438, 2018. Google Scholar

44. Dong, J., S. Wang, and J. Mo, "Design of a twelve-port MIMO antenna system for multi-mode 4G/5G smart-phone applications based on characteristic mode analysis," IEEE Access, Vol. 8, 90751-90759, 2020. Google Scholar

45. Wu, Q. and Z. Wen, "Time domain characteristic mode analysis for transmission problems," IEEE Open Journal of Antennas and Propagation, Vol. 1, 339-349, 2020. Google Scholar

46. Zhang, Z., X. Fu, and S. Cao, "Design of a vertically polarized patch antenna with switchable near-endfire beam using characteristic mode analysis," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 7, 1157-1161, 2020. Google Scholar

47. Lin, F. H. and Z. N. Chen, "A method of suppressing higher order modes for improving radiation performance of metasurface multiport antennas using characteristic mode analysis," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 4, 1894-1902, 2018. Google Scholar

48. Gao, G., et al. "Characteristic mode analysis of a nonuniform metasurface antenna for wearable applications," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 8, 1355-1359, 2020. Google Scholar

49. Han, M. and W. Dou, "Compact clock-shaped broadband circularly polarized antenna based on characteristic mode analysis," IEEE Access, Vol. 7, 159952-159959, 2019. Google Scholar

50. Kim, D. and S. Nam, "Systematic design of a multiport MIMO antenna with bilateral symmetry based on characteristic mode analysis," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 3, 1076-1085, 2018. Google Scholar

51. Mohanty, A. and B. R. Behera, "Investigation of 2-port UWB MIMO diversity antenna design using characteristics mode analysis," AEU-International Journal of Electronics and Communications, Vol. 124, 153-361, 2020. Google Scholar

52. Vandenbosch, G. A. E., "Reactive energies, impedance and Q factor of radiating structures," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 4, 1112-1127, 2010. Google Scholar

53. Capek, M., et al. "The measurable Q factor and observable energies of radiating structures," IEEE Transactionson Antennas and Propagation, Vol. 62, No. 1, 311-318, 2014. Google Scholar

54. Carpenter, C. J., "Electromagnetic energy and power in terms of charges and potentials instead of fields," Proceedings of IEEE, Vol. 136, No. 2, 55-65, 1989. Google Scholar

55. Capek, M., P. Hazdra, and J. Eichler, "A method for the evaluation of radiation Q based on modal approach," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 10, 4556-4567, 2012. Google Scholar

56. Ghalib, A. and M. S. Sharawi, "New antenna mode generation based on theory of characteristic modes," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 6, e21686, 2019. Google Scholar

57. Naidu, P. R. T., et al. "Compact multiple EBG cells loaded UWB-narrowband antenna pair with high isolation for Cognitive Radio (CR) based MIMO applications," AEU - International Journal of Electronics and Communications, Vol. 127, 153420, 2020. Google Scholar

58. Reddy, T., R. Kumar, and R. K. Chaudhary, "Isolation enhancement and radar cross section reduction of MIMO antenna with frequency selective surface," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 3, 1595-1600, 2018. Google Scholar

59. Alam, T., T. Reddy, and R. K. Chaudhary, "Integration of MIMO and cognitive radio for Sub-6 GHz 5G applications," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 10, 2021-2025, 2019. Google Scholar

60. Deng, J.-Y., L.-X. Guo, and X.-L. Liu, "An ultrawideband MIMO antenna with a high isolation," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 182-185, 2015. Google Scholar

61. Jehangir, S. S. and M. S. Sharawi, "A miniaturized UWB biplanar Yagi-like MIMO antenna system," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2320-2323, 2017. Google Scholar

62. Ren, J., et al. "Compact printed MIMO antenna for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1517-1520, 2014. Google Scholar

63. Zhang, S. and G. F. Pedersen, "Mutual coupling reduction for UWB MIMO antennas with wideband neutralization line," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 166-169, 2015. Google Scholar

64. Roshna, T. K., U. Deepak, and P. Mohanan, "Compact UWB MIMO antenna for tridirectional pattern diversity characteristics," IET Microwaves & Antennas Propagation, Vol. 11, No. 14, 2059-2065, 2017. Google Scholar

65. Bilal, M., et al. "An FSS-based nonplanar quad-element UWB-MIMO antenna system," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 987-990, 2016. Google Scholar

66. Liu, X.-L., et al. "A compact ultrawideband MIMO antenna using QSCA for high isolation," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1497-1500, 2014. Google Scholar

67. Roshna, T. K., et al. "A compact UWB MIMO antenna with reflector to enhance isolation," IEEE Transactions and Antennas Propagation, Vol. 63, No. 4, 1873-1877, 2015. Google Scholar

68. Luo, C.-M., J.-S. Hong, and L.-L. Zhong, "Isolation enhancement of a very compact UWB MIMO slot antenna with two defected ground structures," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1766-1769, 2015. Google Scholar

69. Alsath, M. G. N. and M. Kanagasabai, "Compact UWB monopole antenna for automotive communications," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 9, 4204-4208, 2015. Google Scholar

70. Khan, R., et al. "Dual polarized antennas with reduced user effects for LTE-U MIMO mobile terminals," AEU - International Journal of Electronics and Communications, Vol. 111, 152880, 2019. Google Scholar

71. Nirmal, P. C., et al. "Compact wideband MIMO antenna for 4G Wi-MAX, WLAN and UWB applications," AEU - International Journal of Electronics and Communications, Vol. 99, 284-292, 2019. Google Scholar

72. Maurya, N. K. and R. Bhattacharya, "Design of compact dual-polarized multiband MIMO antenna using near-field for IoT," AEU - International Journal of Electronics and Communications, Vol. 117, 153091, 2020. Google Scholar

73. Tran, H. H., N. Hussain, and T. T. Le, "Low-profile wideband circularly polarized MIMO antenna with polarization diversity for WLAN applications," AEU - International Journal of Electronics and Communications, Vol. 108, 172-180, 2019. Google Scholar

74. Azarm, B., et al. "On development of a MIMO antenna for coupling reduction and Wi-MAX suppression purposes," AEU - International Journal of Electronics and Communications, Vol. 99, 226-235, 2019. Google Scholar

75. Behera, B. R., P. R. Meher, and S. K. Mishra, "Microwave antennas - An intrinsic part of RF energy harvesting systems: A contingent study about its design methodologies and state-of-art technologies in current scenario," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 5, e22148, 2020. Google Scholar

Dr. Asutosh Mohanty

Dr. Bikash Ranjan Behera

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