Feed Locating and Beamforming in Collocated MIMO Antenna Using Characteristic Mode Theory
Subject Areas : electrical and computer engineering
Mostafa
Parvin
1
J.
ahmadi-Shokouh
2
Hamideh
DashtiKhavidaki
3
Keywords: Feed locatingcharacteristic modesexcitation amplitudefar-field radiation pattern,
Abstract :
In this paper, a procedure for feed placement in a collocated Multiple Input Multiple Output (MIMO) antenna is presented based on characteristic mode theory. The orthogonality of characteristic currents is used to determine optimal feed locations in the presented antenna. First, characteristic mode analysis is done to determine the resonance modes of the antenna; Then the optimal feed locations are determined to excite these orthogonal modes. Moreover, we modify the shape of the radiation pattern of the antenna by changing amplitude excitation of these modes. It is observed that only by changing amplitudes of the antenna modes and their composition at the desired frequency, the shape and the beam width of the antenna pattern is changed.
[1] A. Ramachandran, S. V. Pushpakaran, M. Pezholil, and V. Kesavath, "A four-port MIMO antenna using concentric square-ring patches loaded with CSRR for high isolation," IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 1196-1199, 10 Nov. 2016.
[2] R. Anitha, P. V. Vinesh, S. Mathew, P. Mohanan, and K. Vasudevan, "Collocated MIMO antenna with reduced mutual coupling using ring DGS," Progress in Electromagnetics Research C, vol. 53, pp. 119-125, 2014.
[3] R. F. Harrington and J. R. Mautz, "Theory of characteristic modes for conducting bodies," IEEE Trans. on Antennas and Propag., vol. 19, no. 5, pp. 622-628, Sept. 1971.
[4] R. Martens and D. Manteuffel, "2-port antenna based on selective excitation of characteristic modes," in Proc. of the IEEE Int. Symp. on Antennas and Propagation, 2 pp., Chicago, IL, USA, 8-11 Jul. 2012.
[5] N. Peitzmeier and D. Manteuffel, "Selective excitation of characteristic modes on an electrically large antenna for MIMO applications," in Proc. of 12th European Conf. on Antenna and Propagation, 5 pp., London, UK, 9-13 Apr. 2018.
[6] D. W. Kim and S. Nam, "Systematic design of a multiport MIMO antenna with bilateral symmetry based on characteristic mode analysis," IEEE Trans. on Antennas and Propag., vol. 66, no. 3, pp. 1076-1088, Mar. 2018.
[7] Y. Liu, A. Ren, H. Liu, H. Wang, and C. Y. D. Sim, "8-port MIMO array using characteristic mode theory for 5G smartphone applications," IEEE Access, vol. 7, pp. 45679-45693, 3 Apr. 2019.
[8] I. Brinster, J. Lohn, and D. Linden, "Antenna feed placement based on theory of characteristic modes," IEEE Antennas and Propagation Society Int. Symp., APSURSI’14, pp. 2012-2013, Memphis, TN, USA, 6-11 Jul. 2014.
[9] B. D. Raines, Systematic Design of Multiple Antenna Systems Using Characteristic Modes, Ph.D Thesis, Ohio State University, 2011.
[10] A. Araghi and G. Dadashzadeh, "Oriented design of an antenna for MIMO applications using theory of characteristic modes," IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 1040-1043, 20 Aug. 2012.
[11] Y. Chen and C. F. Wang, "Characteristic-mode-based improvement of circularly polarized U-slot and E-shaped patch antennas," IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 1474-1477, 30 Nov. 2012.
[12] T. Q. Tran and S. K. Sharma, "Radiation characteristics of multimode concentric circular microstrip patch antenna by controlling amplitude and phase of modes," IEEE Trans. on Antenna and Propag., vol. 60, no. 3, pp. 1601-1605, Mar. 2012.
[13] F. A. Dicanndia, S. Genovesi, and A. Monorchio, "Null-steering antenna design using phase-shifted characteristic modes," IEEE Trans. on Antenna and Propag., vol. 64, no. 7, pp. 2698-2706, Jul. 2016.
[14] F. A. Dicanndia, S. Genovesi, and A. Monorchio, "Advantageous exploitation of characteristic modes analysis for the design of 3-D null-scanning antennas," IEEE Trans. on Antenna and Propag., vol. 65, no. 8, pp. 3924-3934, Aug. 2017.
[15] F. A. Dicanndia, S. Genovesi, and A. Monorchio, "Efficient excitation of characteristic modes for radiation pattern control by using a novel balanced inductive coupling element," IEEE Trans. on Antenna and Propag., vol. 66, no. 3, pp. 1102-1113, Mar. 2018.
[16] K. Li and Y. Shi, "A pattern reconfigurable MIMO antenna design using characteristic modes," IEEE Access, vol. 6, pp. 43526-43534, 6 Aug. 2018.
[17] J. Sarrazin, Y. Mahe, S. Avrillon, and S. Toutain, "Four co-located antennas for MIMO systems with a low mutual coupling using mode confinement," in Proc. .IEEE Antennas and Propagation Society Int. Symp., 4 pp., San Diego, CA, USA, 5-11 Jul. 2008.
[18] J. Sarrazin, Y. Mahe, S. Avrillon, and S. Toutain, "Collocated microstrip antennas for MIMO systems with a low mutual coupling using mode confinement," IEEE Trans. on Antenna and Propag., vol. 58, no. 2, pp. 589-592, Feb. 2010.
[19] Y. Chen and C. F. Wang, Characteristic Modes Theory and Applications in Antenna Engineering, Temasek Laboratories, National University of Singapore, 2015.
[20] B. Rembold, "Relation between diagram correlation factors and s-parameters of multiport antenna with arbitrary feeding network," Electronic Letters, vol. 4, no. 1, pp. 5-7, 3 Jan. 2008.