volume | PIER Journals

Abstract

This article basically deals with the implementation of a negligible resistance varactor with a wide capacitance value into a modified version of a cedar shape antenna [1]. The electromagnetic characteristics of the antenna are manipulated both at the level of fractal geometry and electrical length using diodes. The antenna achieves tunability in a wide frequency range as a quad band antenna operating between 1.45 GHz and 4.6 GHz when 3 pairs of varactors are connected across slots. Pin diodes are also implemented leading to tunability in triple frequency bands between 3.7 GHz and 5.8 GHz. Moreover, implementing pin diodes as switches allows frequency reconfigurability of a dual band between 2.5 and 4 GHz and a single band of 6.6 GHz. The antenna RF frequencies have many applications in wireless communication that cover GPS, Bluetooth, WIFI, WIMAX and WLAN.

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14. Khidre, A., F. Yang, and A. Z. Elsherbeni, "Circularly polarized beam-scanning microstrip antenna using a reconfigurable parasitic patch of tunable electrical size," IEEE Transactions on Antennas and Propagation, Vol. 63, 2858-2866, Jul. 2015.
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15. Aghdam, S. A., "A novel uwb monopole antenna with tunable notched behavior using varactor diode," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1243-1246, 2014.
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16. Al-Husseini, M. M. M. and K. Y. Kabalan, "Effect of different varactor models on antenna tunability," HPCS Conf., accepted Italy, Jul. 2017.

17. Petko, J. S. and D. H. Werner, "Miniature reconfigurable three-dimensional fractal tree antennas," IEEE Transactions on Antennas and Propagation, Vol. 52, 1945-1956, 2004.
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18. https://www.digikey.com/product-detail/en/skyworks-solutions-inc/SMP1322 079LF/863-1100-1- ND/2052232).

19. H.-N. https://www.digikey.com/product-detail/en/toshiba-semiconductor-and storage/1SV325.

Dr. Mervat Akram Madi

Dr. Mohammed Al-Husseini

Professor Karim Youssef Kabalan