Reconfigurable Microstrip Printed Patch Antenna for Future Cognitive Radio Applications

Elfergani, I. T. E. and Al-Rawi, Mina and Rodriguez, Jonathan and Mshwat, Widad A. and Hussaini, Abubakar Sadiq and Abdalla, Abdelgader M. and Otung, Ifiok and Abd-Alhameed, Raed (2017) Reconfigurable Microstrip Printed Patch Antenna for Future Cognitive Radio Applications. EAI Endorsed Transactions on Cognitive Communications, 3 (12): e1. ISSN 2313-4534

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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.

Item Type: Article
Uncontrolled Keywords: varactor, microstrip antenna; cognitive radio; embedded slot ;GPS ;GSM UMTS; WLAN; LTE
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
QA75 Electronic computers. Computer science
Depositing User: EAI Editor II.
Date Deposited: 10 Sep 2020 14:13
Last Modified: 10 Sep 2020 14:13

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