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Design of frequency reconfigurable antenna for cognitive radio applications



  1. Department of Electronics and Communication Engineering, K.L.N College of Engineering, Sivagangai, Tamil Nadu, India
  2. Department of Electronics and Communication Engineering, Kalasalingam University, Tamil Nadu, India


In the recent times, with the explosion of wireless technologies and demand for spectrum efficiency led to the analysis of frequency reconfigurable antenna. This is the next frontier in science and technology for cognitive radio. A frequency reconfigurable antenna with slots in the partial ground plane is proposed. UWB antenna along with reconfigurable features was modeled numerically and self consistently solved with equations. The dimensions of the proposed antenna were designed with the help of the equations. This led to the miniaturization of the antenna and enhancement in bandwidth. The simulated results show that the proposed antennas maintain impedance bandwidth from 3.1 to 11 GHz with simultaneous tunable frequencies. The maximum gain of the antenna is 6.5dB and VSWR is less than 2 over the operating band. The results show that the H plane radiation pattern is omnidirectional over the operating band. The fabricated prototype of frequency reconfigurable antenna with pin diode is done. The measured results shows good agreement with the simulation results for wideband and switching characteristics.


Frequency reconfigurable antennas, Partial ground plane omnidirectional, UWB, Microstrip discontinuity.


T. R. MUTHU, A. THENMOZHI, Design of frequency reconfigurable antenna for cognitive radio applications, Optoelectronics and Advanced Materials - Rapid Communications, 15, 5-6, May-June 2021, pp.260-270 (2021).

Submitted at: May 21, 2020

Accepted at: June 11, 2021