Internet of Things Controlled Reconfigurable Antenna for RF Harvesting

  • Arun Vijayan Anna University Chennai
  • Karl Marx lR Thiagarajar College of Engineering Madurai
Keywords: Reconfigurable antenna, Internet of Things antenna, PIN diode switching antenna, Frequency reconfiguration, RF Harvesting


Internet of Things (IoT) controlled a reconfigurable antenna with PIN diode switch for modern wireless communication is designed and implemented. Direct contact of biasing network with the antenna is eliminated and the switching unit is manipulated through IoT method. The proposed antenna has ring structures, in which the outer ring connects the inner ring structure through a PIN diode switch. The dimension of the proposed antenna is reported as 50 mm × 50 mm and its prototype has been made-up on epoxy-Fr4 substrate with 1.6 mm thickness. This antenna setup is made to reconfigurable in four bands (4.5 GHz, 3.5 GHz, 2.4 GHz, and 1.8 GHz) through switching provided by IoT device (NodeMCU). The antenna has a good return loss greater than -10dB.In switching state 2 the antenna has a return loss of -30 dB peak is attained at 3.4 GHz of operating frequency. Similarly the gain response of antenna is good in its operating bands of all switching states and obtained a maximum gain of 2.7 dB in 3.5 GHz. Bidirectional radiation pattern is obtained in all switching states of the antenna.

Author Biographies

Arun Vijayan, Anna University Chennai
Mr Arun V. received his Graduation and Post-graduation in Electronics and Communication Engineering from Anna University, India, in 2008 and 2010, respectively. Currently pursuing his PhD in Anna University, India. Presently working as an Assistant Professor at Electronics and Communication Engineering Department, Anna University – Chennai, Regional Campus Madurai, India.His research interests include: Reconfigurable antenna and RF microwave communication systems.
Karl Marx lR, Thiagarajar College of Engineering Madurai
Dr L.R. Karl Marx received his BE from Madurai Kamarajar University, India and ME from Thapar Institute of Engineering and Technology, India, and PhD from National Institute of Technology Trichy, India, in 1988, 2000, and 2011, respectively. Presently working as an Associate Professor at Thiagarajar College of Engineering. His research interest includes : Design of actuators, microstrip antennas, microwave sensors, RFID antennas for readers and tags, embedded system.
How to Cite
Vijayan, A., & lR, K. (2018). Internet of Things Controlled Reconfigurable Antenna for RF Harvesting. Defence Science Journal, 68(6), 566-571.
Electronics & Communication Systems