Browsing by Author "Samsuzzaman, M."

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A compact disc-shaped super wideband patch antenna with a structure of parasitic element
(IOS Press, 2016) Islam, M. M.; Islam, M. T.; Faruque, M. R. I.; Misran, N.; Samsuzzaman, M.; Hossain, M. I.; Alam, T.
In this paper, a disc-shaped monopole antenna has been investigated for super-wideband applications with a structure of parasitic element. The proposed SWB antenna consists of disc-shaped patch and a partial ground plane with a structure of parasitic element. The parasitic element consists of 4 rectangular embedded slots on the ground plane. This parasitic element on the ground plane leads the UWB frequency band into the SWB frequency band. This proposed SWB antenna is fed by a microstrip line and is printed on low dielectric FR4 material of 1.6 mm thickness. All the simulations are performed using commercially available, finite element method (FEM) based Ansoft high-frequency structure simulator (HFSS) software and CST Microwave Studio. Measured results exhibit that the proposed disc-shaped antenna shows a wide bandwidth which covers from 2.90 GHz to more than 20 GHz, with a compact dimension of 25 mm × 33 mm for VSWR < 2, observing a SWB frequency. A good combination is noticed between simulation and measurement. The simple construction, sharply, surface current flow, much impedance bandwidth, nearly omnidirectional radiation patterns, stable peak gain (3.20-6.22 dBi) and a considerable bandwidth dimension ratio (≥ 2062. 22) are a good deal sounder than the existing super wideband antennas which make it appropriate for many wireless communication systems such as L, C, X, UWB, Ku, and SWB bands. Full Text Link: http://doi.org/10.3233/JAE-140188
A compact monopole antenna with improved bandwidth for Ku band applications
(Universiti Kebangsaan Malaysia, 2015) Islam, M. M.; Islam, M. T.; Samsuzzaman, M.; Faruque, M. R. I.
A compact monopole antenna has been presented with improved bandwidth for Ku-band applications. The proposed Ku-band antenna is made of rectangular slots and circular slots on the ground and the patch, respectively, by a microstrip line of 50 Ω. It is designed on a printed circuit board of 15 mm × 15 mm× 1.6 mm using FR4 as a substrate material. High Frequency Structural Simulator (HFSS) is commercially available, which has been considered in this study depending on the concept of the Finite Element Method (FEM). 2.70 GHz (14.10 GHz to 16.80 GHz) is the achieved bandwidth of the proposed Ku-band antenna. The average gain is 3.66 dBi where 3.94 dBi is the maximum gain. The proposed Ku-band patch antenna exhibits smooth current distribution and durable nearly Omni-directional radiation patterns.
A Compact Patch Antenna for Ultrawideband Application
(IEEE, 2016-10-28) Islam, M. Tarikul; Samsuzzaman, M.; Islam, M. M.; Mahmmud, M.Z.; Islam, M.T.
A compact microstrip line fed tapered-shaped slotted ultra-wideband(UWB) antenna is presented. The new design is composed of a rectangular slotted patch with a compact size of 21.44 × 23.53 mm2 and fed by microstrip transmission line of 50 Ω. The proposed antenna is simulated onto a less expensive FR4 substrate which has a height of 1.6 mm. There achieved a wider bandwidth of 8.51 GHz (3.49-12 GHz) with good impedance matching, constant gain, 5.76 dBi of maximum gain and stable radiation pattern results in the proposed antenna more appropriate for using UWB communication applications compared to existing antennas. The proposed antenna is designed and simulated in HFSS and CST Microwave Studio software to see the antenna performance.
A negative index metamaterial antenna for UWB microwave imaging applications
(Wiley, 2015-03-27) Islam, M. M.; Islam, M. T.; Samsuzzaman, M.; Faruque, M.R.I.
In this article, a negative index metamaterial antenna ispresented for ultrawideband (UWB) microwave imaging applications.Four left-handed (LH) metamaterial (MTM unit cells are located alongone axis of the antenna as the radiating element. Each left-handed meta-material unit cell assembles a modified split-ring resonator with acapacitance-loaded strip to obtain a design architecture that at a timeshows both negative permittivity and negative permeability, whichassures the stable negative refractive index to raise the antenna per-formance for microwave imaging. The antenna structure of dimension16 3 21 3 1.6 mm3is printed on low dielectric FR4 material with aslotted ground plane and a microstrip feed. Measured reflection coeffi-cient illustrates that this antenna attains 114.5% bandwidth covering thefrequency band of 3.4–12.5 GHz for a voltage standing wave ratio lessthan 2 with a maximum gain 5.16 dBi at 10.15 GHz. There is a stable harmony between simulation and measured results and improved nearlyomnidirectional radiation characteristics within the operational fre-quency band. The stable surface current distribution, negative refractiveindex characteristic, considerable gain, and radiation property havemade this proposed negative index metamaterial antenna distinguishablefor UWB microwave imaging applications. Full Text Link: http://doi.org/10.1002/mop.29095
Circularly polarized high gain S band antenna for nanosatellite
(IOS Press, 2015) Samsuzzaman, M.; Islam, M. T.; Nahar, M. K.; Mandeep, J.S.; Mansor, F.; Islam, M. M.
A circular polarized highly directional S band patch antenna for small satellite applications has been proposed in this invention. The proposed antenna comprises of a square ground plane and two circular radiating patches with annular circular slot fed by a coaxial probe. The circular slot in the radiating patch is responsible for creating resonance at the S band. The prototype is can be easily integrated with a small satellite due to the simplicity of the design. The modification of the circular shape patch by cutting circular shape slots help to excite the resonance at the desired frequency. The simulation and the experimental results have a good agreement. The proposed antenna has achieved an impedance bandwidth of 55 MHz (2.380 GHz-2.435 GHz) and axial ratio (AR) < 3 dB is about 35 MHz (2.410 MHz-2.445 MHz) in the operating band. The prototype has achieved a gain of 8.13 dBi at centre frequency of 2.42 GHz. The directional radiation pattern, circular polarization (CP), and high gain characteristics make the proposed antenna suitable for small satellite applications. Full Text Link: http://doi.org/10.3233/JAE-140147
Circularly polarized patch antenna for S-band satellite applications
(IEEE, 2015-10-01) Azim, R.; Samsuzzaman, M.; Alam, T.; Islam, M.T.; Faruque, M.R.I.; Zaman, M. R.; Islam, M. M.
In this paper, a circularly polarized antenna is proposed for satellite communication system. Commercially available Finite Integration Technique (FIT) based software Computer Simulation Technology (CST) microwave studio and finite element method solver based High Frequency Structural Simulator (HFSS) have been used in this analysis. The proposed antenna achieved 3dB axial ratio of 30 MHz with -10dB reflection coefficient. The axial ratio and reflection coefficient has been verified with both CST and HFSS simulation software. The operating frequency of the proposed antenna is 2.35 GHz. The antenna has been printed on FR-4 (lossy) Substrate material with relative Permittivity of 4.6 and thickness of 1.6 mm. The proposed antenna exhibits a 3 dB axial-ratio beam width of more than 1420. Full Text Link: http://doi.org/10.1109/IconSpace.2015.7283837
Compact metamaterial antenna for UWB applications
(IEEE, 2015-08-06) Islam, M.M.; Islam, M.T.; Samsuzzaman, M.; Faruque, M.R.I.
A compact antenna is proposed using planar-patterned metamaterial structures for ultra-wideband applications. This antenna consists of four metamaterial unit cells that simultaneously show both negative permeability and negative permittivity on the triangular patch and three rectangular slots on the partial ground plane fed with a microstrip line. It has a wide bandwidth from 3.07 to 19.91 GHz for voltage standing wave ratio (VSWR) <;2 and an average gain of 5.62 dBi with a peak of 8.57 dBi because of using planar-patterned metamaterial structures. Good agreement between computations and experiments is realised convincing that the antenna can operate over a wide bandwidth with planar-patterned metamaterial structures and compact size (0.28 λ × 0.19 λ × 0.02 λ ). Full Text Link: http://doi.org/10.1049/el.2015.2131
Microstrip line‐fed fractal antenna with a high fidelity factor for UWB imaging applications
(Wiley, 2015-08-28) Islam, M. M.; Islam, M. T.; Samsuzzaman, M.; Faruque, M. R. I.; Misran, N.
A printed microstrip line‐fed fractal antenna is presented with a high fidelity factor for UWB applications. The antenna structure of electrical dimension 0.24 λ × 0.33 λ at lower frequency 3.1 GHz is made of a fractal patch, a slotted partial ground plane, and a microstrip feed, which is fabricated on FR4 material of low cost and dielectric. Measured results demonstrates that the fractal antenna achieves fractional bandwidth of 117.88% covering the frequency range from 3.1 GHz to more than 12 GHz with a maximum gain 3.54 dBi at 6.25 GHz. An acceptable analogy is observed between measured and simulation results. The high fidelity factor, sharply surface current distribution, time domain performances, acceptable gain, and nearly omnidirectional radiation characteristic have validated the appropriateness of this proposed fractal antenna for UWB and microwave imaging applications. Full Text Link: https://doi.org/10.1002/mop.29401
Miniaturized dual band Y shaped antenna by high dielectric ceramic filled bio plastic composite material
(IOS Press, 2016-02-18) Samsuzzaman, M.; Islam, M.T.; Mandeep, J.S.; Mahmud, M.Z.; Alam, T.; Islam, M. M.
A miniaturized multiband printed antenna designed for high dielectric ceramic filled Bio plastic composite material is presented. The multiband antenna formed by Y shaped patch with a partial ground plane. The performance benchmarks of the proposed antenna have been experimentally verified by fabricating a printed prototype. The experimental results confirm that the proposed antenna achieves -10 dB impedance bandwidth of 10.07% (1.79-1.98 GHz) at lower band and 8.83% (2.38-2.6 GHz) at the upper band, respectively. The antenna configuration and parametric study have been carried out with the help of the commercially available EM simulator and a good harmony is apparent between experimental and numerical results. Moreover, the antenna has a simple planar structure of a small area of only 38 mm × 40 mm. The proposed antenna can operate PCS1900 and WLAN bands. Good radiation characteristics, gain and radiation efficiency are obtained over these operating bands. Full Text Link: http://doi.org/10.3233/JAE-150087
Omni-directional microstrip monopole antenna for UWB microwave imaging system
(IEEE, 2015-08-27) Islam, M. M.; Islam, M.T.; Samsuzzaman, M.; Faruque, M. R. I.; Misran, N.
A miniaturized ultra-wideband antenna is presented for using in microwave imaging systems. This antenna structure consists of a radiating patch, a microstrip transmission line, and a partial ground plane which provides a wide bandwidth covering from 3.65 GHz to more than 11 GHz frequency. It has overall dimensions of 16 mm × 21 mm× 1.6 mm with a compact size. Negligible distortion is observed from the time domain characteristic of the proposed UWB antenna. It is appropriate for using in the field of microwave imaging systems due to its short pulse operation. The proposed antenna shows good directional radiation pattern, considerable gain level, surface current distribution and correlation coefficient for using in the microwave imaging systems. Full Text Link: http://doi.org/10.1109/I4CT.2015.7219645
Ultra-wideband to super-wideband antenna convebsion using parasitic elements
(Universiti Kebangsaan Malaysia, 2015) Faruque, M.R.I.; Islam, M. M.; Islam, M. T.; Samsuzzaman, M.
Researchers from an university in Malaysia convert an ultra-wideband (UWB) antenna into a super-wideband (SWB) antenna by placing a parasitic element on the ground plane. The super-wideband antenna radiates in a near omnidirectional manner. The antenna has been printed on both sides of a dielectric FR4 substrate 1.6 mm thick, and with permittivity of 4.6 and loss tangent of 0.02.