volume | PIER Journals

Abstract

A microstrip antenna system operating in the 2.4 GHz WLAN band is presented for in-band full-duplex operation. The design includes a patch antenna fed by a 180° hybrid. Two feeding methods are presented, probe and aperture. The measured bandwidths are 2.5% (60 MHz) and 2.1% (50 MHz) for the probe fed and aperture fed, respectively. The probe fed system reaches measured isolation (S21) < -50 dB and the aperture fed < -45 dB in a reflective environment. The design also has an omnidirectional radiation pattern, reasonable gain values, and a very low envelope correlation coefficient (<0.01).

1. Sabharwal, A., P. Schniter, D. Guo, D. Bliss, S. Rangarajan, and R.Wichman, "In-band full-duplex wireless: Challenges and opportunities," IEEE J. Sel. Areas Commun., Vol. 32, No. 9, Sept. 2014. Google Scholar

2. Jain, M., J. I. Choi, T. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, "Practical, real-time, full duplex wireless," Proc. ACM Annu. Int. Conf. Mobile Computing Netw., 301-312, 2011. Google Scholar

3. Liu, G. F., R. Yu, H. Ji, V. C. M. Leung, and X. Li, "In-band full-duplex relaying: A survey, research issues and challenges," IEEE Commun. Surveys and Tutorials, Vol. 17, No. 2, 500-524, 2015.
doi:10.1109/COMST.2015.2394324 Google Scholar

4. Duarte, M., C. Dick, and A. Sabharwal, "Experiment-driven characterization of full-duplex wireless systems," IEEE Trans. Wireless Commun., Vol. 11, 4296-4307, Dec. 2012.
doi:10.1109/TWC.2012.102612.111278 Google Scholar

5. Aryafar, E., M. A. Khojastepour, K. Sundaresan, S. Rangarajan, and M. Chiang, "MIDU: Enabling MIMO full duplex," Proc. ACM Annu. Int. Conf. Mobile Computing Netw., 257-268, 2012. Google Scholar

6. Khojastepour, M. A., K. Sundaresan, S. Rangarajan, X. Zhang, and S. Barghi, "The case for antenna cancellation for scalable full-duplex wireless communications," Proc. ACM Workshop Hot Topics Netw., 171-176, 2011. Google Scholar

7. Duarte, M. and A. Sabharwal, "Full-duplex wireless communications using off-the-shelf radios: Feasibility and first results," Proc. Asilomar Conf. Signals, Syst., Comput., 1558-1562, Nov. 2010. Google Scholar

8. Everett, E., M. Duarte, C. Dick, and A. Sabharwal, "Empowering fullduplex wireless communication by exploiting directional diversity," Proc. Asilomar Conf. Signals, Syst., Comput., 2002-2006, Nov. 2011. Google Scholar

9. Everett, E., A. Sahai, and A. Sabharwal, "Passive self-interference suppression for full-duplex infrastructure nodes," IEEE Trans. on Wireless Comm., Vol. 13, No. 2, 680-694, 2013.
doi:10.1109/TWC.2013.010214.130226 Google Scholar

10. Choi, J. I., M. Jain, K. Srinivasan, P. Levis, and S. Katti, "Achieving single channel, full duplex wireless communication," Proc. ACM Annu. Int. Conf. Mobile Computing Netw., 1-12, 2010. Google Scholar

11. Hong, S., J. Mehlman, and S. Katti, "Picasso: Flexible RF and spectrum slicing," Proc. SIGCOMM, 1-5, Aug. 2012. Google Scholar

12. Bharadia, D., E. McMilin, and S. Katt, "Full duplex radios," ACM Sigcomm Computer Communication Review, Vol. 43, No. 4, 375-386, Oct. 2013.
doi:10.1145/2534169.2486033 Google Scholar

13. Makar, G., N. Tran, and T. Karacolak, "A high isolation monopole array with ring hybrid feeding structure for in-band full-duplex systems," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 356-359, 2017.
doi:10.1109/LAWP.2016.2577003 Google Scholar

14. Fernandez, S. C. and S. K. Sharma, "Multiband printed meandered loop antennas with MIMO implementations for wireless routers," IEEE Antennas Wireless Propag. Lett., Vol. 12, 96-99, 2013.
doi:10.1109/LAWP.2013.2243104 Google Scholar

15. Gong, Q., Y. Jiao, and S. Gong, "Compact MIMO antennas using a ring hybrid for WLAN applications," Journal of Electromagnetic Waves and Applications, Vol. 25, 431-441, 2011.
doi:10.1163/156939311794362939 Google Scholar

16. Wu, T., S. Fang, and K. Wong, "Printed diversity monopole antenna for WLAN operation," Electronics Lett., Vol. 38, No. 25, 1625-1626, Dec. 2002.
doi:10.1049/el:20021188 Google Scholar

17. Yang, C., Y. Yao, J. Yu, and X. Chen, "Novel compact multiband MIMO antenna for mobile terminal," Int. J. of Antennas and Propag., Vol. 2012, Article ID 691681, 9 pages, 2012. Google Scholar

Dr. Gregory Makar

Dr. Daniel Kim

Dr. Nghi Tran

Dr. Tutku Karacolak