Research Article
Reconfigurable Microstrip Printed Patch Antenna for Future Cognitive Radio Applications
@ARTICLE{10.4108/eai.13-12-2017.153473, author={I. T. E. Elfergani and Mina Al-Rawi and Jonathan Rodriguez and Widad A. Mshwat and Abubakar Sadiq Hussaini and Abdelgader M. Abdalla and Ifiok Otung and Raed Abd-Alhameed}, title={Reconfigurable Microstrip Printed Patch Antenna for Future Cognitive Radio Applications}, journal={EAI Endorsed Transactions on Cognitive Communications}, volume={3}, number={12}, publisher={EAI}, journal_a={COGCOM}, year={2017}, month={12}, keywords={varactor, microstrip antenna; cognitive radio; embedded slot ;GPS ;GSM UMTS; WLAN; LTE.}, doi={10.4108/eai.13-12-2017.153473} }- I. T. E. Elfergani
Mina Al-Rawi
Jonathan Rodriguez
Widad A. Mshwat
Abubakar Sadiq Hussaini
Abdelgader M. Abdalla
Ifiok Otung
Raed Abd-Alhameed
Year: 2017
Reconfigurable Microstrip Printed Patch Antenna for Future Cognitive Radio Applications
COGCOM
EAI
DOI: 10.4108/eai.13-12-2017.153473
Abstract
A family of compact microstrip antennas are presented targeting applications such as Long-Term Evolution (LTE), Wireless Local Area Networks (WLAN), Universal Mobile Telecommunications system (UMTS), Global System Mobile (GSM) and global positioning system (GPS). These antennas consist of a rectangular shaped structure printed over FR4 substrate. The antenna occupies a small volume of 70x54x1.6mm3. A 50-Ohm strip line was used to feed the proposed antennas. For miniaturization purposes, an I- shaped slot was inserted in the appropriate location on the radiator resulting in the second version (antenna with I-shaped slot). The integration of the slot helped towards shifting the resonant frequency downwards, which potentially created an additional resonant frequency to cover the WLAN2400MHz, but this resonant frequency is still static in nature. Thus, tuning mechanisms were introduced to tune the resonant frequency over a wide continuous frequency range. A lumped capacitor was firstly used as the tuning approach, in which its capacitance was varied from 0.5pF to 3pF, covering the frequency range from 2300MHz to 1500MHz. Secondly, the varactor diode was exploited to verify this; by changing the bias voltage across the varactor from 0.21V to 12.9V, the antenna operates over the targeted range from 1500MHz to 2300MHz. Both the simulated and measured results show a stable performance. The proposed antenna may be suitable for future cognitive radio system.
Copyright © 2017 I.T.E.Elfergani et al., licensed to EAI. This is an open access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/), which permits unlimited use, distribution and reproduction in any medium so long as the original work is properly cited.
