Azremi Abdullah Al Hadi, Assoc. Prof. Ts. Dr.: Recent submissions

Now showing items 1-20 of 44

    • Impedance Analysis of Mobile Phone Antenna in the Presence of User's Hand 

      Nur Basyirah, A Rahman; Azremi Abdullah, Al Hadi; Saidatul Norlyana, Azemi (EDP Sciences, 2017)
      User interaction (UI) has been identified to degrade the performance of the antenna. A system that measures impedance characteristics of a planar inverted-F antenna (PIFA) when there are user interactions is designed using ...

    • Helical Antenna sensor for Different Liquid Type Identification 

      Waleed Majdi Issa, Ikhmis; Saidatul Norlyana, Azemi; Azremi Abdullah, Al-Hadi; Ping Jack, Soh; Mohd Faizal, Jamlos (EDP Sciences, 2017)
      There are variety of lliquid sensor measurement systems that available in the market nowadays. It is used to measure various parameter for wide range application or to address a specific application. However, most of the ...

    • Dual Band Planar Inverted F Antenna (PIFA) with L-Shape Configuration 

      Mohamad Khlouf, Munzer; Saidatul Norlyana, Azemi; Azremi Abdullah, Al-Hadi; Soh, Ping Jack; Mohd Faizal, Jamlos (EDP Sciences, 2017)
      One of the most used antennas in mobile devices is planar inverted F antenna (PIFA). PIFA can be design in dual band frequencies due to the coverage of the wireless service in a mobile device that requires a multiple ...

    • A review of antennas for Picosatellite applications 

      Abdul Halim, Lokman; Soh, Ping Jack; Saidatul Norlyana, Azemi; Herwansyah, Lago; Podilchak, Symon K.; Chalermwisutkul, Suramate; Mohd Faizal, Jamlos; Azremi Abdullah, Al-Hadi; Akkaraekthalin, Prayoot; Gao, Steven (Hindawi Limited, 2017)
      Cube Satellite (CubeSat) technology is an attractive emerging alternative to conventional satellites in radio astronomy, earth observation, weather forecasting, space research, and communications. Its size, however, poses ...

    • A novel 2.45GHz switchable beam textile antenna (SBTA) for outdoor wireless body area network (WBAN) applications 

      Mohd Ilman, Jais; Mohd Faizal, Jamlos, Dr.; Muzammil, Jusoh, Dr.; Sabapathy, Thennarasan; Muhammad Ramlee, Kamarudin, Assoc. Prof. Dr.; R. Badlishah, Ahmad, Prof. Dr.; Azremi, Abdullah Al Hadi, Dr.; Emi Izhanizam, Azmi; Soh, Ping Jack; Vandenbosch, Guy AE E; Nur Laila Khamariah, Ishak (EMW Publishing, 2013)
      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. ...

    • Design and measurement-based evaluation of multi-antenna mobile terminals for LTE 3500MHz band 

      Azremi, Abdullah Al Hadi, Dr.; Nima, Jamaly; Katsuyuki, Haneda; Clemens, Icheln; Ville V., Viikari (EMW Publishing, 2013)
      Design of multi-element antennas (MA) for small mobile terminals operating at higher frequencies remains challenging despite smaller antenna dimension and possibility of achieving electrically large separation between them. ...

    • Influence of the user's hand on mutual coupling of dual-antenna structures on mobile terminal 

      Azremi, Abdullah Al Hadi; Ilvonen, Janne; Li, Chung Huan; Holopainen, Jari; Vainikainen, Pertti V. (Institute of Electrical and Electronics Engineers (IEEE), 2012-03-26)
      This paper studies the influence of the user's hand on the mutual coupling of dual-antenna structures on a mobile terminal. The terminal consists of two planar inverted-F antennas (PIFA) on a typical 100 × 40 mm 2 mobile ...

    • Simplified Modeling, Simulation and Performance Analysis Using Circuit Model for a Corporate Feed Microstrip Patch Array 

      Soh, Ping Jack; Azremi, Abdullah Al Hadi; R A Rahim; Dayang Khadijah, Hamzah; Mohd Taufik, Jusoh (Institute of Electrical and Electronics Engineers (IEEE), 2007-03-27)
      This work is an effort in investigating and modeling an accurate circuit model derived from the transmission line method (CM/TLM) by simulating a rectangular microstrip patch array using two different simulation techniques, ...

    • Multi-antenna mobile terminal diversity performance in proximity to human hands under different propagation environment conditions 

      Azremi, Abdullah Al Hadi; Papamichael, Vasilis Christos; Vainikainen, Pertti V. (The Institution of Engineering and Technology, 2011-10-27)
      The effective diversity gain (EDG) of a four-element planar inverted-F antenna array, which operates at 3500MHz in the proximity to one hand in data-mode grip and two hands in browsing-mode grip, is predicted using a ...

    • Ambiguity analysis of isolation - Based multi-antenna structures on mobile terminal 

      Azremi, Abdullah Al Hadi; Costa, Mario; Koivunen, Visa; Vainikainen, Pertti (Institute of Electrical and Electronics Engineering (IEEE), 2011-04-10)
      This paper presents a comprehensive numerical study on the ambiguities for different isolation-based multi-antenna structures. The focus is on four-element planar inverted-F antennas (PIFA) array on a typical 100mm 40mm ...

    • Rubber tire dust-rice husk pyramidal microwave absorber 

      Mohd Fareq, Abd. Malek, Dr.; Cheng, Ee Meng, Dr.; O., Nadiah; Nornikman, Hassan; M., Ahmed; M. Z. A., Abd Aziz; A. R., Osman; Soh, Ping Jack; Azremi, Abdullah Al Hadi; A., Hasnain; Mohd Nasir, Taib (EMW Publishing, 2011)
      Rubber tire dust-rice husk is an innovation in improving the design of pyramidal microwave absorbers to be used in radio frequency (RF) anechoic chambers. An RF anechoic chamber is a shielded room covered with absorbers ...

    • Site-specific evaluation of a MIMO channel capacity for multi-antenna mobile terminals in proximity to a human hand 

      Azremi, Abdullah Al Hadi; Haneda, K.; Vainikainen, P. (The European Association on Antennas and Propagation (EurAAP), 2011-04-10)
      This paper presents a comprehensive evaluation on the Multiple-Input Multiple-Output (MIMO) channel capacity performance of a coupling element -based multi-antenna structures on a mobile terminal at the 2000 MHz Universal ...

    • Setup and results of pyramidal microwave absorbers using rice husks 

      Nornikman, Hassan; Fareq, Malek, Dr.; Ahmed, M.; Wee, Fwen Hoon; Soh, Ping Jack; Azremi, Abdullah Al Hadi, Dr.; Ghani, S. A.; Hasnain, A.; Taib, M. N. (EMW Publishing, 2011)
      Agricultural wastes are considered not useful and are commonly dumped or burned after crop harvesting. Rice husks from paddy (Oryza sativa) are example of agricultural wastes. Rice husks have been investigated as the ...

    • Reflection loss performance of hexagonal base pyramid microwave absorber using different agricultural waste material 

      Nornikman, Hassan; Fareq, Malek, Dr.; Soh, Ping Jack; Azremi, Abdullah Al Hadi (Institute of Electrical and Electronics Engineers (IEEE), 2010-11-08)
      Hexagonal base pyramid microwave absorber is the new design of microwave absorber. In this work, two sub-shapes are considered to compare it reflection loss performance. The shapes are hexagonal and truncated hexagonal ...

    • Parametric studies of the pyramidal microwave absorber using rice husk 

      Nornikman, Hassan; Fareq, Malek, Dr.; Soh, Ping Jack; Azremi, Abdullah Al Hadi; Wee, Fwen Hoon; Hasnain, A. (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Agriculture waste has potential to be used as an alternative material for the microwave absorber used in the anechoic chamber. Compared to the current materials used, such as polystyrene and polyurethane, agricultural waste ...

    • On diversity performance of two-element coupling element based antenna structure for mobile terminal 

      Azremi, Abdullah Al Hadi; Toivanen, J.; Laitinen, J.; Vainikainen, P.; Chen, X.; Jamaly, N.; Carlsson, J.; Kildal, P.-S. (Institute of Electrical and Electronics Engineers (IEEE), 2010-04-12)
      In wireless communication systems, multipath interference has a significant impact on system design and performance. Fast fading is caused by the coherent summation of one or more echoes from many reflection points reaching ...

    • Microwave wedge absorber design using rice husk - An evaluation on placement variation 

      Nornikman, Hassan; Soh, Ping Jack; Fareq, Malek, Dr.; Azremi, Abdullah Al Hadi; Wee, Fwen Hoon; R. Badlishah, Ahmad, Dr. (Institute of Electrical and Electronics Engineers (IEEE), 2010-04-12)
      Placement variation is one example of parameters that critically affects the performance of RF absorbers. In this work, four designed variation patterns - W, X, Y, and Z were discussed to compare the reflectivity (Sll) ...

    • Design and analysis of a novel dielectric loaded helical antenna 

      Ezanuddin, A. A. M.; Soh, Ping Jack; Azremi, Abdullah Al Hadi; R. Badlishah, Ahmad, Assoc. Prof. Dr. (World Scientific and Engineering Academy and Society (WSEAS) Press, 2009)
      Helical antennas have been a popular antenna configuration for various applications for its simple structure. This work describes the study on a novel, custom-shaped dielectric loaded helical antenna incorporated on an ...

    • Multiband fractal planar inverted F antenna (F-PIFA) for mobile phone application 

      Saidatul, N.A.; Azremi, Abdullah Al Hadi; R. Badlishah, Ahmad, Prof. Madya Dr.; Soh, Ping Jack; Fareq, Malek (EMW Publishing, 2009)
      The design of a novel Fractal planar inverted F antenna (F-PIFA) based on the self affinity property is presented in this paper. The procedure for designing a Fractal Planar Inverted F Antenna is explained and three different ...

    • Design of pyramidal microwave absorber using agriculture waste with different resin content percentage 

      Nornikman, Hassan; Soh, Ping Jack; Azremi, Abdullah Al Hadi; Wee, Fwen Hoon (Universiti Malaysia Pahang (UMP), 2009-06-20)
      Agriculture waste has many potential to produce an alternative and beneficial product for any suitable application such as microwave absorber for anechoic chamber. In this work, agriculture waste like rice husk from ...