Reduction of wireless signals in indoor environments by using an active frequency selective wall based on spectrum sensing

Summary This paper presents a wireless local area network (WLAN) spectrum control system that uses active frequency selective shielding walls to selectively reduce or pass WLAN signals in the 5 GHz band indoors. The proposed system utilizes a well-known active frequency selective structure based on a rectangular loop with PIN diodes and is thus capable of either reducing or passing the WLAN frequency by using the on/off switching of the PIN diode based on the measured electric field strength in indoor. We designed and simulated the proposed active frequency selective shielding wallpaper by using commercial electromagnetic simulation software and confirmed that the proposed structure can reduce the WLAN signal by switching the PIN diode by applying the manufactured prototype on the exterior of an experimental apparatus containing a WLAN receiver antenna that is capable of measuring the received electric field strength. Extension of the results presented herein can be applied to reduce the wireless signal to enhance the spectrum efficiency of an indoor space.

[1]  A. Newblold.  Designing buildings for the wireless-age [FSS build-up] , 2004 .

[2]  Telmo R. Fernandes,et al.  Dual-band single-layer quarter ring frequency selective surface for Wi-Fi applications , 2016 .

[3]  B. Sanz-Izquierdo,et al.  Dual Polarized Reconfigurable Frequency Selective Surfaces , 2014, IEEE Transactions on Antennas and Propagation.

[4]  John C. Batchelor,et al.  Tuning technique for active FSS arrays , 2009 .

[5]  A. Newbold.  Designing buildings for the wireless age [FSS] , 2004 .

[6]  Jianjun Jiang,et al.  Switchable frequency selective surfaces absorber/reflector for wideband applications , 2015 .

[7]  K. L. Ford,et al.  Switchable Frequency Selective Surface for Reconfigurable Electromagnetic Architecture of Buildings , 2010, IEEE Transactions on Antennas and Propagation.

[8]  Ghanshyam Singh,et al.  Circular ring frequency selective surface: A novel synthesis technique , 2013, 2013 Sixth International Conference on Contemporary Computing (IC3).

[9]  Nidal Qasem.  Enhancing wireless communication system performance through modified indoor environments , 2014 .

[10]  Nidal Qasem,et al.  Enhancing the capacity of MIMO systems via modified building using Frequency Selective wallpapers , 2015, 2015 6th International Conference on Information and Communication Systems (ICICS).

[11]  B. Sanz-Izquierdo,et al.  Wideband FSS for electromagnetic architecture in buildings , 2011 .

[12]  R.J. Langley,et al.  An active square loop frequency selective surface , 1993, IEEE Microwave and Guided Wave Letters.

[13]  B. Sanz-Izquierdo,et al.  Switchable Frequency Selective Slot Arrays , 2011, IEEE Transactions on Antennas and Propagation.

[14]  E. A. Parker,et al.  An Active Annular Ring Frequency Selective Surface , 2011, IEEE Transactions on Antennas and Propagation.

[15]  Antonio Luiz P. S. Campos,et al.  Compact frequency selective surface with dual band response for WLAN applications , 2015 .

[16]  Stavros Stavrou,et al.  The impact of environment variation on co-channel interference in WLAN , 2003 .

[17]  A. Williamson,et al.  A Frequency-Selective Wall for Interference Reduction in Wireless Indoor Environments , 2006, IEEE Antennas and Propagation Magazine.

[18]  B. Sanz-Izquierdo,et al.  Designing FSS for wireless propagation control within buildings , 2009, 2009 Loughborough Antennas & Propagation Conference.

[19]  John C. Batchelor,et al.  Angular independent frequency selective surfaces for interference control in indoor wireless environments , 2012 .

[20]  Changiz Ghobadi,et al.  Novel single layer reconfigurable frequency selective surface with UWB and multi-band modes of operation , 2016 .

[22]  Y. Yoon,et al.  Equivalent circuit modeling of active frequency selective surfaces , 2008, 2008 IEEE Radio and Wireless Symposium.

[23]  Marwah Majid.  Smart Wall Based on Active Frequency Selective Wallpaper , 2016 .