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Search Results: 1 - 10 of 24946 matches for " Muzammil Jusoh;Mohd Faizal Bin Jamlos;Muhammad Ramlee Kamarudin;Thennarasan Sabapathy;Mohd Ilman Jais;Mohd Aminudin Jamlos "
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A Fabrication of Intelligent Spiral Reconfigurable Beam Forming Antenna for 2.35-2.39 GHz Applications and Path Loss Measurements
Muzammil Jusoh;Mohd Faizal Bin Jamlos;Muhammad Ramlee Kamarudin;Thennarasan Sabapathy;Mohd Ilman Jais;Mohd Aminudin Jamlos
PIER , 2013, DOI: 10.2528/PIER13020501
Abstract: A reconfigurable beam forming antenna prototype using a spiral feed line is proposed in this paper. The presented antenna is integrated with PIN diode switches at a specific location of spiral feed line. It is discovered that the beam steering ability is greatly influenced by the spiral arm feed network. Four PIN diode switches have been incorporated at four different arms of spiral feed line to realize a beam forming ability. The intelligence behaviour of this antenna is conferred when the switches are connected to programmable intelligent computer (PIC) microcontroller. Certain configurations of PIC allow the antenna's radiation patterns to be adaptively changed within 0.01 ms. Therefore, the proposed antenna is capable of electronically forming the beam up to four different angles of +176°, +10°, -1° and -12°. This antenna is small in size with 100 mm by 100 mm of substrate dimension. In this research, the site field antenna performance relying on the received signal strength (RSS) testing is tested intensively in Universiti Malaysia Perlis with varied distant points of line-of-sight (LOS) and non-line-of-sight (NLOS) propagation. With good simulation and measurement results, this antenna could be a promising candidate to be installed in applications such as a smart antenna system, cognitive radio, WiMAX and long term evolution (LTE).
A Novel 2.45 GHz Switchable Beam Textile Antenna (Sbta) for Outdoor Wireless Body Area Network (Wban) Applications
Mohd Ilman Jais;Mohd Faizal Bin Jamlos;Muzammil Jusoh;Thennarasan Sabapathy;Muhammad Ramlee Kamarudin;Raad Badlishah Ahmad;Azremi Abdullah Al-Hadi Azremi;Emi Izhanizam Bin Azmi;Ping Jack Soh;Guy A. E. Vandenbosch;Nur Laila Kamariah Ishak
PIER , 2013, DOI: 10.2528/PIER13022610
Abstract: A novel switchable beam textile antenna (SBTA) for wireless body area network (WBAN) applications is proposed. The SBTA is centrally-fed by a coaxial probe and the power distributed over four circular radiating elements. Four RF switches are integrated through which the SBTA is able to generate beam steering in four directions: 0°, 90°, 180°, and 270°, with a maximum directivity of 6.8 dBi at 0°. Its small size (88 mm x 88 mm) and flexibility enables the structure to be easily integrated into safety jackets, rain coats, etc., for tracking, and search and rescue communication purposes. The structure successfully integrates reconfigurability into a wearable textile antenna.
A Novel Green Antenna Phase-Shift System with Data Acquisition Boards
Mohd Faizal Bin Jamlos;Tharek Abdul Rahman;Muhammad Ramlee Kamarudin;Mohd Aminudin Jamlos;Mohd Asmi Romli;Zahari Awang Ahmad;Mohd Fareq Bin Abd Malek;Muzammil Jusoh;Nur Farhan Kahar;Sharul Kamal Bin Abd Rahim
PIER B , 2012, DOI: 10.2528/PIERB12033103
Abstract: A novel green phase shifter system is proposed in this research. The system is developed by a combination of reconfigurable beam steering antennas and data acquisition (DAQ) boards. A combination of two reconfigurable beam steering antennas, located side-by-side, forms a spatial configuration structure with a fabricated `green' element plank of rice husk placed in between. The concept of a spatial configuration technique has been `mutated' by shifting the structure of spiral feed line and aperture slots of first beam steering antenna by as much as 45o. The PIN diode switches connected to the DAQ boards enable the intelligent capability of the spatial antennas. The activation of certain degree radiation patterns of either the first beam steering antenna or the second beam steering antenna depends on the memory of the DAQ boards --- Beam Manager. When an intruder comes from the cardinal angles of 0o/360o, 90o, 180o, or 270o, its range and angles' location will be automatically detected by the first antenna through the output ports of the 1st DAQ: P1.0, P1.1, P1.2, and P1.3. The second antenna is then activated by the output ports of the 2nd DAQ: P2.0 up to P2.3, to adaptively maneuver the beam towards four different ordinal directions of 45o, 135o, 225o, and 315o. As a result, this system collectively contributes to the development of eight angles of radiation patterns, which can be rotated in 45o steps within 0.01 ms and successfully cover 360o without any uncovered and overlapped angle; 0°/360°, 45o, 90°, 135o, 180°, 225o, 270°, and 315o. Moreover, a mutual coupling effect generated by the spatial configuration of both antennas is alleviated by the element plank of rice husk, whose width, length, and thickness are 45 mm, 150 mm, and 10 mm, respectively. Possessing the characteristics of an adaptive new phase shifter concept and assisted by the green element of a rice husk, this system is potentially an effective way to decrease the number of drop outs and lost connections, and provides larger coverage. It is a promising candidate for installation with a WiMAX application.
A MIMO Antenna Design Challenges for UWB Application
Muzammil Jusoh;Mohd Faizal Bin Jamlos;Muhammad Ramlee Kamarudin;Mohd Fareq Bin Abd Malek
PIER B , 2012, DOI: 10.2528/PIERB11092701
Abstract: This paper proposes a compact printed ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna with a dimension of 38 x 91 mm. The presented UWB-MIMO antenna is comprised of two identical patch elements with D separation distance on the same substrate. The basic single antenna structure has a novel design comprising seven circles surrounding a center circle with partial ground plane implementation. Furthermore, the experimental antenna has peak gain of 5.3 dBi between an operating frequency of 2.8 GHz and 8.0 GHz under a minimum reflection coefficient of less than -10 dB (S<-10 dB). Moreover, the antenna successfully achieved mutual coupling minimization of < -17 dB, eventually resulting in enhancement of radiation efficiency. Besides, the UWB-MIMO's correlation coefficient was effectively reduced to less than -22 dB, which reflected an improvement in the antenna's diversity. In this paper, the proposed antenna is examined both numerically and experimentally.
A Reconfigurable Ultrawideband (UWB) Compact Tree-Design Antenna System
Muzammil Jusoh;Mohd Faizal Bin Jamlos;Muhammad Ramlee Kamarudin;Mohd Fareq Abd Malek;Mohd Asmi Romli;Zahari Awang Ahmad;Mohd Hafizuddin Mat;Muhammad Solihin Zulkefli
PIER C , 2012, DOI: 10.2528/PIERC12041011
Abstract: A novel compact tree-design antenna (NCTA) with the ability of reconfigurable ultra-wideband (UWB) of 3.1 GHz to 10.6GHz to five multi-narrowband applications is proposed. This antenna has a novel radiating element design that consists of seven small circles (7-filter) surrounding a central circle. Moreover, the NCTA incorporates the 7-filter that functioned as filter into the antenna design. The compact 38mm x 38mm antenna integrates three PIN diode switches, which are connected to a single National Instrument Data Acquisition (NI-DAQ) Board. The DAQ itself is controlled (ON/OFF state) by a virtual instrument known as "Lab VIEW Interface Software". The activation of specific PIN diode switches in the configuration that is controlled by the DAQ then, in turn, determines the frequency agility. The presented antenna is capable of performing up to five multi-bands. The operating frequencies are as follows; band 1 (2.72-11.8 GHz), band 2 (2.4-4 GHz, 5.3-11.6 GHz), band 3 (2.7-6.5 GHz, 7.1-11.6 GHz), band 4 (2.7-4.4 GHz, 5.2-6.5 GHz, 7.1-11.7 GHz) and band 5 (2.6-3.5 GHz, 4.8-7.0 GHz, 7.4 GHz-11.5 GHz). Furthermore, the antenna has a gain of up to 6dBi, which is considered better than that of conventional antenna. The proposed antenna produces a proficient divisive radiation pattern at 4 and 6 GHz. The experimental results exhibit the success of the antenna performance. It is competent as future candidate for cognitive radio and military applications.
A Novel of Reconfigurable Planar Antenna Array (Rpaa) with Beam Steering Control
Mohd Tarmizi Ali;Mohd Nor Md Tan;Tharek Abdul Rahman;Muhammad Ramlee Kamarudin;Mohd Faizal Bin Jamlos;Ronan Sauleau
PIER B , 2010, DOI: 10.2528/PIERB10020710
Abstract: A new antenna structure is formed by combining the concept of reconfigurable planar antenna array (RPAA) with the parasitic elements to produce beam steering patterns. The antenna has been integrated with the PIN diode switches that enable the beam to be steered in the desired direction. This has been done by changing the switch state to either on or off mode. In this work, a number of parasitic elements have been applied to the antenna, namely reflectors and directors. They are placed in between the driven elements, which is aimed to improve the beam steering angle. With such configuration, the main beam radiated by the array can be tilted due to the effect of mutual coupling between the driven elements and parasitic elements (reflectors and director). The unique property of this antenna design is that instead of fabricating all together in the same plane, the antenna's feeding network is separated from the antenna radiating elements (the patches) by an air gap distance. This allows reducing the spurious effects from the feeding line. The optimization results for the resonant frequencies of the antennas with variable air gap heights are also been studied. The antenna is made for 5.8 GHz. Good agreement is achieved between the simulation and measurement.
Adaptive Beam Steering of Rlsa Antenna with RFID Technology
Mohd Faizal Bin Jamlos;Tharek Abdul Rahman;Muhammad Ramlee Kamarudin;P. Saad;Omar Abdul Aziz;M. Amir Shamsudin
PIER , 2010, DOI: 10.2528/PIER10071903
Abstract: A form of a novel adaptive antenna system that combines radio frequency identification (RFID) technology, programmable intelligent computer (PIC) microcontroller and reconfigurable beam steering antenna is proposed. Localization and adaptive response are the most challenging issues in smart antenna system. In this research, the localization technique relying on the received signal strength (RSS) signals has been done intensively where the capability of the RFID tag in producing certain level of signal strength has been exploited as a stimulator for the system to adaptively activate certain PIN diode switches of reconfigurable beam steering antenna. It is found that the detecting ability of the RSSI signals is extremely influenced by the 45°angle of the RFID reader's directive antenna. The combination of four 90°triangles which have 'adjacent' and 'opposite' angle of 45°forming pyramid antenna which has four sections; 1, 2, 3 and 4 enable the RFID readers to receive the RSS signals from the angles of 0°/360°, 90°, 180°and 270°respectively. When the RFID tag is directly facing a certain section, certain RSS signals will 'flow' from particular section into their respected RFID readers to automatically detect the range and angles' location of the RFID tag through the input ports of PIC microcontroller: A1, A4, C4 and C7. The PIN diode switches of the reconfigurable beam steering antenna are then activated by the output ports of PIC microcontroller: B0 up to B4, to steer the beam adaptively towards the RFID tag at four different angles: 0°/360°, 90°, 180°, and 270°according to the algorithm programmed in the microcontroller. It is found that the Ground Reflection (Two-Ray) propagation model is very crucial in determining the projection and height of reconfigurable antenna to efficiently cover the scattered measurement points of 1 up to 10 at four angles with different ranges of distance. The proposed antenna has a great potential in realizing the new smart antenna system replacing the conventional adaptive array antenna and Wimax application.
A Novel Adaptive Wi-Fi System with RFID Technology
Mohd Faizal Bin Jamlos;Tharek Abdul Rahman;Muhammad Ramlee Kamarudin;P. Saad;M. Amir Shamsudin;A. M. M. Dahlan
PIER , 2010, DOI: 10.2528/PIER10071904
Abstract: A novel adaptive Wireless-Fidelity (Wi-Fi) system is the combination of radio frequency identification (RFID) technology, programmable intelligent microcontroller development board (PIDB) and reconfigurable antenna with beam shape characteristics. The system is capable to sustain a Wi-Fi signal adaptively above its threshold level (-81 dBm) within a range up to 100 m across three different buildings with variety indoor environments and floors. It is found that the modified ground reflection model has successfully predicted the total path loss of the test-bay buildings which consist of corridors, several floors and windows. The modified propagation model is extremely crucial in determining the projection and height of reconfigurable antenna to efficiently cover the scattered measurement points across the three buildings. The need of comparable signal strength is compulsory since the signal strength between 2.4 GHz of reconfigurable beam shape antenna and 0.433 GHz of RFID tag is different within the same distance. When reconfigurable beam shape antenna radiates with a minimum gain of 4.85 dBi, the measured signal strength shows that most of the measurement points are below Wi-Fi s threshold level which is from -69.001 dBm to -115.4530 dBm. However, the proposed system is able to boost all the signal strength above the threshold level with three different gain of reconfigurable beam shape antenna, 7.2 dBi, 9.9 dBi and 14.64 dBi through the activation of mobile RFID tag at different measurement points at one time. The boosted signal strengths are within the range of -69 dBm to -73.056 dBm. The capability of the mobile RFID tag in producing certain level of signal strength has been successfully exploited as a wireless stimulator for the system to adaptively activate certain PIN diode switches of reconfigurable beam shape antenna in this finding. The proposed system also has a great potential in realizing a new smart antenna system replacing the conventional switching beam array (SBA) antenna.
Transparent Antenna Design for WiMAX Application
Alyaa Syaza Azini;Muhammad Ramlee Kamarudin;Tharek Abdul Rahman;Hashimu Uledi Iddi;Abdulrahman Amuda Yusuf;Mohd Faizal Bin Jamlos
PIER , 2013, DOI: 10.2528/PIER13021809
Abstract: A transparent monopole antenna operating at 2.30 GHz is presented in this paper. The radiating element and ground plane are both designed using AgHT-4, while the substrate is made of glass. The simulated and measured impedance bandwidths (BWs) are 41.89% (2.00-3.06 GHz) and 90.91% (1.5-4.00 GHz), respectively. These results were obtained by using a suitable arc-shape slot on the ground plane; and the BWs cover the IEEE 802.16e standard for WiMAX application in the 2.30 GHz band. The gain of proposed antenna is 3.16 dBi, and there is close agreement between measurement and simulation results, in terms of return loss and radiation patterns.
A Multi Band Mini Printed Omni Directional Antenna with V-Shaped for RFID Applications
Evizal;Tharek Abdul Rahman;Sharul Kamal Bin Abd Rahim;Mohd Faizal Bin Jamlos
PIER B , 2011, DOI: 10.2528/PIERB10112505
Abstract: This paper presents a mini multi-band printed omni-directional antenna with v-shaped structure for radio frequency identification (RFID applications. The proposed multi-band antenna is developed from the initial v-shaped design which is only capable of working as a single-band antenna. By deploying a concept of dipole antenna to an initial design, the proposed antenna is accomplished to operate with two different modes of RFID system which are passive and active modes at frequencies of 915 MHz and 2.45 GHz respectively. The passive RFID tag is invented when a chip of UHF (Ultra High Frequency) is integrated with a proposed multi-band antenna. This passive tag, which is able to radiate with the measured signal strength, shows that the reading ranges are boosted almost two times compared to the conventional inlay antenna. The maximum reading range of passive RFID tag with inlay antenna is 5 m, though a reading range up to 10 m is achievable through the deployment of the proposed antenna at a measurement field. Implicitly, the measurements carried out on the antenna are in good agreement with the simulated values. Moreover, the size of the mobile passive RFID tag has been substantially as 100 mm x 70 mm, even though the antenna is fabricated with an inexpensive FR-4 substrate material. With the reasonable gain, coupled with cheaper material and smaller size, the proposed antenna has attractive potentials for use in RFID applications with multiple frequency antenna for active and passive tags.
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