Design of a Frequency Reconfigurable Notched-Band Ultra-Wideband Antenna for Cognitive Radio Applications

Authors

  • Muflih Alsulami Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University P.O. Box 80204, Jeddah 21589, Saudi Arabia
  • Hatem Rmili Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University P.O. Box 80204, Jeddah 21589, Saudi Arabia
  • Sondos Mehri Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University P.O. Box 80204, Jeddah 21589, Saudi Arabia
  • Bandar Hakim Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University P.O. Box 80204, Jeddah 21589, Saudi Arabia
  • Muntasir Sheikh Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University P.O. Box 80204, Jeddah 21589, Saudi Arabia
  • Raj Mittra Electrical and Computer Engineering Department, Faculty of Engineering, King Abdulaziz University P.O. Box 80204, Jeddah 21589, Saudi Arabia, 2 Electrical and Computer Engineering Department, University of Central Florida EMC Lab, Orlando, FL 32816, USA

Keywords:

Frequency reconfigurability, notched band, varactor diode, ultrawide band

Abstract

This paper proposes a frequency reconfigurable notched-band UWB antenna design, which is capable of wide band rejection. We begin with a conventional reconfigurable modified-square monopole printed antenna and insert a U-shaped slot to create the rejection band. Next, we add two identical SMV1249 varactor diodes with variable capacitances in the created slots to tune the rejected band. We modify the capacitances, which, in turn, controls rejected band by controlling the reverse bias voltage applied across the varactor diodes. The proposed structure has been simulated, optimized, fabricated and experimentally tested. Good agreement has been achieved between the simulation and measurement results. Experimental results show that when the bias voltage is varied from 0 to 7 V, the antenna can be reconfigured to achieve various rejection frequency bands, and to maintain good impedance match as well as stable radiation patterns over the explored frequency band ranging from 1 to 6 GHz.

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References

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Published

2019-09-01

How to Cite

[1]
Muflih Alsulami, Hatem Rmili, Sondos Mehri, Bandar Hakim, Muntasir Sheikh, and Raj Mittra, “Design of a Frequency Reconfigurable Notched-Band Ultra-Wideband Antenna for Cognitive Radio Applications”, ACES Journal, vol. 34, no. 09, pp. 1287–1293, Sep. 2019.

Issue

2019: Vol 34 Iss 9

Section

General Submission