Analysis of Antenna Isolation Using Decoupling Structure

Title & Authors
Analysis of Antenna Isolation Using Decoupling Structure
Lee, Junghun; Kim, Jihoon; Kim, Min-Gi; Kim, Hyung-Hoon; Kim, Hyeong-Dong;

Abstract
In this paper, isolation enhanced antenna using isolating resonator was proposed. Two loop type antennas were designed to operate at Wi-Fi band(2.4~2.5 GHz), in symmetry to the center, and are closely located to each other. In order to enhance isolation characteristics at Wi-Fi bands, isolating resonator was designed between the two loop type antennas. The proposed isolating resonator is a slot type antenna that enhances isolation with the control of the size, and by adjusting the value of capacitor($\small{C_D}$) the resonant frequency of the isolating resonator can easily be adjusted to enhance isolation characteristic at the target frequency.
Keywords
Antenna Isolation;Isolation Network;MIMO;Decoupling Resonator;Three Port Network;
Language
Korean
Cited by
References
1.
Michael A. Jensen, Jon W. Wallace, "A review of antennas and propagation for MIMO wireless communications", IEEE Transactions on Antennas Propagation, vol. 52, no. 11, pp. 2810-2824, Nov. 2004.

2.
D. Gesbert, M. Shafi, D.-S. Shiu, P. Smith and A. Naguib, "From theory to practice: An overview of MIMO space-time coded wireless systems", IEEE J. Sel. Areas Communications, vol. 21, no. 3, pp. 281-302, Apr. 2003.

3.
A. C. K. Mak, C. R. Rowell, and R. D. Murch, "Isolation enhancement between two closely packed antennas", IEEE Trans. Antennas Propag., vol. 56, no. 11, pp. 3411-3419, Nov. 2008.

4.
A. Diallo, C. Luxey, P. L. THuc, R. Staraj, and G. Kossiavas, "Study and reduction of the mutual coupling between two mobile phone PIFAs operating in the DCS-1800 and UMTS bands", IEEE Trans. Antennas Propag., vol. 54, no. 11, pp. 3063-3073, Nov. 2006.

5.
D. Assanuk, M. Uthansakul, and P. Ulthansakul, "Optimal antenna positions on mobile terminal for 4$\times$4 MIMO systems", Electrical Engineering / Electrics, Computer, Telecommunications and Information Technology, 2009. ECTI-CON 2009. 6th International Conference on.

6.
Kin-Lu Wong, Jui-Hung Chou, Chia-Lun Tang, and Shih-Huang Yeh K, "Integrated internal GSM/DCS and W-LAN atennnas with optimized isolation for a PDA phone", Microwave Opt Technol Lett., vol. 46, no. 4, pp. 323-326, Aug. 2005.

7.
Jun Itoh, Naobumi Michishita, "A study on mutual coupling reduction between two inverted-F antennas using mushroom-type EBG structures", Antennas and Propagation Society International Symposium, AP-S IEEE Jul. 2008.

8.
S. Fallahzadeh, H. Bahrami, A. Akbarzadeh, and M. Tayarani, "High-Isolation dual-frequency operation patch antenna using spiral defected microstrip structure", IEEE trans. Antennas Propag., vol. 9, pp. 122-124, Nov. 2010.