Evaluation and Testing of Dual Band Reconfigurable Monopole Antenna for Cognitive Radio Applications
Current research article involves the study and investigation of a novel reconfigurable monopole patch antenna applicable for cognitive radio services. Initially, a rigorous analysis is carried in tuning the dimensions of the antenna design progressively including the effect of change in dielectric constant and thickness values to obtain the optimized final structure. Outer dimensions of the antenna model are 65 mm × 75 mm by placing the RF switches (strips) between uniformly positioned dual slits on the top layer of the design. Fabricated antenna implanted on FR4 dielectric substrate operates at single band when the switches are in ON position and the configurations shifts to operate in dual bands when the switches are in either ON or OFF position by about 1.6% (from 0.35 to 2.65 GHz). Tuning of the resonant frequency of the structure can be performed by changing the length of the electrical length of the slot. Structures are implemented using 3D CST MW Studio simulator and found that better gain is obtained at both the operating frequencies when either of the switches are in ON/OFF state. In this paper, antenna for desired frequency bands by functional integration for cognitive radio systems with cost-effectiveness is presented.
KeywordsReconfigurable Dual bands FR4 substrate Strips Slot Gain
The authors would like to acknowledge the support of SERB/ECR team under Department of Science and Technology with financial grant No. 000585 for carrying this work. The authors are also greatly indebted to Prof. N. V. S. N. Sarma, Dr. I. A. Pasha and colleagues of Department of ECE, BVRIT, Medak for their encouragement, support and inspiration throughout in preparation of this research article.
- 1.Weedon WH, Payne WJ, Rebeiz GM, Herd JS, Champion M (1999) MEMS-switched reconfigurable multi-band antenna: design and modeling. In: Proceedings of 1999 antenna applications symposium, Allerton Park, Monticello, IL, 15–17 SeptGoogle Scholar
- 2.Payne WJ, Weedon WH (2000) Stripline feed networks for reconfigurable patch antennas. In: Proceedings of 2000 antenna applications symposium, Allerton Park, Monticello, ILGoogle Scholar
- 3.Bernhard JT (2003) Reconfigurable antennas and apertures: state-of-the-art and future outlook. In: Proceedings of SPIE conference smart electronics, MEMS, BioMEMS, and nanotechnology, vol 5055, pp 1–9Google Scholar
- 4.Peroulis D, Sarabandi K, Katehi LPB (2001) A planar VHF reconfigurable slot antenna. In: Proceedings of IEEE/URSI antennas and propagation society international symposium, vol 1, pp 154–157Google Scholar
- 5.Guohu C, Hua J, Xue L, Xiaobo C (2012) Study on adaptive reconfigurable antenna in cognitive radio. In: 2012 IEEE international conference on microwave and millimeter wave technology (ICMMT), vol 3, pp 1–4Google Scholar
- 7.Boudaghi H, Mohammadnaghi A, Mardani H (2012) Novel frequency reconfigurable microstrip monopole antenna for multi-radio wireless applications. In: IEEE 20th Iranian conference on electrical engineering (ICEE2012), pp 1298–1301Google Scholar
- 8.Gupta KC, Li J, Ramadoss R, Wang C (2000) Design of frequency-reconfigurable slot ring antennas. In: Proceedings of IEEE/URSI international symposium antennas and propagation, vol 1, p 326Google Scholar