Browsing by Author "Islam, M. F."

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    Design a slotted metamaterial microstrip patch antenna by creating three dual isosceles triangular slots on the patch and bandwidth enhancement
    (IEEE, 2018-02-01) Paul, L. C.; Haque, M. A.; Haque, M. A.; Rashid, M. M. U.; Islam, M. F.; Rahman, M. M.
    The aim of this work is to design and analysis the performance of a metamaterial (MTM) based microstrip patch antenna (MP A) by introducing three dual isosceles triangular slots on the metallic patch. At First, a conventional microstrip patch antenna is designed using Isola FR-408 (loss free) substrate material having dielectric constant of 3.75. Then the slotted microstrip patch antenna has been designed and verified as left handed metamaterial (LHM) with the help of Nicolson Ross Weir (NRW) method. All the simulations have been accomplished by CST microwave studio 2011. The bandwidth of the proposed MTM antenna is enhanced by 464.93% compared to our designed conventional MPA (77 MHz for conventional MPA and 435 MHz for metamaterial MPA) and the return loss is reduced from -11.89 dB to -55.34 dB and directivity is increased from 6.713 dB to 7.187 dB. The voltage standing wave ratio (VSWR) of the proposed metamaterial antenna is of 1.0034 which is very close to unity.
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    Design and analysis of four elements E, H and combined E-H shaped microstrip patch array antenna for wireless applications
    (IEEE, 2018-02-01) Paul, L. C.; Akhter, M. S.; Haque, M. A.; Islam, M. R.; Islam, M. F.; Rahman, M. M.
    In this paper, different shaped patch antenna and their array configurations have been designed and simulated by using advanced designed system (ADS) in order to improve the overall performance of microstrip patch antenna (MP A). FR4 dielectric material is used as substrate which has a dielectric constant of 4.4 and height of the dielectric substrate is 1 mm and loss tangent, tan δ is 0. Antennas are fed through 50 Ω microstrip feed line. Each array consists of corresponding four single elements. Different antenna performance parameters like return loss, bandwidth, directivity, gain & radiation efficiency were analyzed for all the proposed antennas.