Browsing by Author "Rahman, T. A."
Now showing 1 - 8 of 8
Results Per Page
Sort Options
Item Design of Dual-Band B-Shaped Monopole Antenna for MIMO Application(IEEE, 2012) Iddi, Hashim U.; Kamarudin, M. R.; Rahman, T. A.; Dewan, R.A dual-band B-shaped monopole antenna for MIMO application is presented. The proposed antenna consists of B-shaped element which operates at dual band frequencies of 2.45GHz and 5.8GHz. The prototype has been fabricated and when tested, the impedance bandwidths are 29.9% and 33.8% for 2.45GHz and 5.8GHz, respectively. Good agreement between the measurement and simulation results in term of return loss and radiation pattern have been obtained.Item Dual-band Circular Patch Antenna for wideband application(IEEE, 2013) Alabidi, Ebrahim S.; Kamarudin, M. R.; Rahman, T. A.; Iddi, Hashim U.; Jamlos, M. F.A Circular Patch Antenna for wideband application is presented in this paper. The antenna has been designed, simulated and fabricated on an FR4 substrate with dielectric constant (εr) of 4.4 and thickness of 1.6mm. A dual feed approach has been used in the design of the proposed wideband antenna. The dual-band circular patch antenna is smaller than the conventional antenna for wideband application. The final optimized design is 40×50mm2. The measured and simulated return loss results and simulated radiation pattern results of proposed antenna has been presented.Item Multi-band Circular Patch Antenna for Wideband Application(2013-08) Aabidi, Ebrahim S.; Kamarudin, M. R.; Rahman, T. A.; Iddi, Hashim U.This paper presents a multi-band circular patch antenna for wideband applications. The antenna operates at 1.5, 2.8, 4.0, 4.8, 7.5 and 8.8 GHz frequency bands. The antenna has been designed, simulated and fabricated on an FR4 substrate with dielectric constant ("r) of 4.4 and thickness of 1.6 mm. A dual feed approach has been used in the design of the proposed wideband antenna. The multi-band circular patch antenna is smaller than the conventional antenna for wideband application. The ¯nal optimized design is 50 £ 50mm2. The measured and simulated return loss results and simulated radiation pattern results of proposed antenna has been presented. The dual feed improves the gain of the proposed antenna. The measured and simulated results show that the proposed antenna provides good performance in term of return loss and radiation pattern for wideband applications.Item Optimization of Radial Line Slots Array Antenna Design for Satellite Communications(IEEE, 2013) Iliya, S. Z.; Rahman, T. A.; Iddi, Hashim U.; Purnamirza, T.; Orakwue, S. I.; Elijah, O.This paper presents a numerical method of identifying the beam squinting optimal design parameters. It is aimed at eradicating the arbitrary method of selection of phi, (φ) thetaT(θT) and phiT(φT) which improves the overall production process. Arbitrary selection of design parameters for beam squinting method which has been identified to solve the inherent return loss problems associated with the linearly polarized radial line slots array (LP-RLSA) design is time wasting and slows satellite design and manufacturing process. Results from the numerical solutions are computed using CST microwave studio (CST 2010); an antenna design software. Simulation results were compared with those obtained from literatures and it showed excellent agreement).Item P-shape Monopole Antenna Design for WBAN Application(2013-03) Aabidi, Ebrahim S.; Kamarudin, M. R.; Rahman, T. A.; Iddi, Hashim U.This paper presents P-shaped monopole antenna for WBAN application for 3.1 to 5.1 GHz frequency band. The design and simulation of proposed antenna for WBAN applications in the free space and close proximity of body surface has been done using CST Microwave Studio. The proposed antenna was designed on the FR4 substrate with dielectric constant, "r of 4.4 and thickness of 1.6 mm. The ¯nal optimized design is 32 £ 28mm2. The antenna is suitable to be deployed for WBAN application.Item Planar Cone-Shaped Monopole Antenna with Tapered Ground for UWB Application(IEEE, 2012) Iddi, Hashim U.; Kamarudin, M. R.; Rahman, T. A.; Dewan, R.Compared to the narrow band antenna design, ultra wideband (UWB) antenna design has a lot of challenges. One of such challenge is the requirement that the return loss must be below 10dB bandwidth from 3.1-10.6GHz throughout the UWB frequency range. Other challenges include low cost, small size, light weight and good radiation patterns [1]. One of the characteristic of conventional planar monopole antenna have narrow impedance bandwidth due to their high quality factor [2].Item Reconfigurable Monopole Antenna for WLAN/WiMAX Applications(2013-03) Iddi, Hashim U.; Kamarudin, M. R.; Rahman, T. A.; Dewan, R.In this paper, a simple recon¯gurable monopole antenna for WLAN/WiMAX ap- plication is presented. The proposed antenna has been designed and compared to a three patch strips triple band monopole antenna which operate at 2.45 GHz, 3.5 GHz and 5.8 GHz frequency bands. The antenna has been simulated using CST software studio and fabricated on FR4 substrate. The proposed antenna provides triple bands in which the bandwidth of 367MHz for 2.45 GHz, 799MHz for 3.5 GHz and a bandwidth of 3.47 GHz for 5.8 GHz has been obtained. The results show that the measured and simulated return loss characteristic of the optimized antenna satis¯es the requirement of the 2.4/5.8 GHz WLAN and 3.5 GHz WiMAX antenna application. The proposed recon¯gurable antenna is low pro¯le, compact and small in size and show good performance for WLAN/WiMAX bands. There is good agreement between the measurement and simulation results in terms of return loss and radiation pattern.Item Triple Band Planar Monopole Antenna for MIMO Application(2013-08) Iddi, Hashim U.; Kamarudin, M. R.; Rahman, T. A.; Abdulrahman, Amuda Y.; Dewan, R.; Azini, Alyaa S.A triple band planar monopole antenna for MIMO application is presented in this paper. The antenna array consists of two triple band monopole antennas with three copper strips, which operate at three frequency bands (2.4, 3.5 and 5.8 GHz). The antenna has been simulated using CST software and the prototype has been fabricated using FR4 substrate. The antenna provides the ¡10 dB bandwidths (BWs) of 308MHz (from 2.2275 to 2.5354 GHz), 472MHz (from 3.337 to 3.809 GHz) and 1.688 GHz (from 5.488 to 7.176 GHz) for 2.4, 3.5 and 5.8 GHz respectively. The antenna array achieve low mutual coupling of ¡22 dB at separation distance of 10 mm, which is approximately ¸/12. There is good agreement between the measurement and simulation results in terms of return loss and radiation pattern.