A. Ittipiboon

Kingston College, Milwaukee, Wisconsin, United States

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Publications (131)66.91 Total impact

  • A. Petosa, A. Ittipiboon
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    ABSTRACT: This article presents a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades. Major research activities in each decade are highlighted. The current state of the art of dielectric-resonator-antenna technology is then reviewed. The achievable performance of dielectric resonator antennas designed for compactness, wide impedance bandwidth, low profiles, circular polarization, or high gain are illustrated. The latest developments in dielectric-resonator-antenna arrays and fabrication techniques are also examined.
    IEEE Antennas and Propagation Magazine 11/2010; · 1.18 Impact Factor
  • Source
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    ABSTRACT: A four-layer transmitarray operating at 30 GHz is designed using a dual-resonant double square ring as the unit cell element. The two resonances of the double ring are used to increase the per-layer phase variation while maintaining a wide transmission magnitude bandwidth of the unit cell. The design procedure for both the single-layer unit cell and the cascaded connection of four layers is described and it leads to a 50% increase in the -1 dB gain bandwidth over that of previous transmitarrays. Results of a 7.5% -1 dB gain bandwidth and 47% radiation efficiency are reported.
    IEEE Transactions on Antennas and Propagation 06/2010; · 2.33 Impact Factor
  • Source
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    ABSTRACT: Dual-resonant double square ring elements are applied to the design of a four-layer transmitarray operating at 30 GHz. The design procedure is described and results of a 7.5% -1 dB gain bandwidth and 47% radiation efficiency are reported.
    Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, 2009. ANTEM/URSI 2009. 13th International Symposium on; 03/2009
  • A. Petosa, S. Thirakoune, A. Ittipiboon
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    ABSTRACT: The use of higher-order modes of a rectangular dielectric resonator antenna (DRA) are investigated for increasing directivity. Using the TE<sup>x</sup> <sub>delta15</sub> mode, a directivity of almost 11 dB has been simulated for a DRA operating at 10.6 GHz.
    Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, 2009. ANTEM/URSI 2009. 13th International Symposium on; 03/2009
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    ABSTRACT: This paper provides an overview of different types of ring geometries that have been investigated recently in communications research centre Canada as the building block of wideband reflectarray elements. The superior performance of these reflectarrays in terms of operating bandwidth was demonstrated experimentally. Techniques for the design of wideband reflectarray with ring type elements will be presented.
    Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, 2009. ANTEM/URSI 2009. 13th International Symposium on; 03/2009
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    ABSTRACT: An overview of the research in the field of periodic structures at Communications Research Centre Canada is presented. The paper covers areas such as: reflectarrays, transmitarrays, artificial dielectric volume holograms, and holographic-based antennas. Achievements, current state of research in each of these areas will be presented.
    01/2009;
  • J. Shaker, M. Chaharmir, M. Cuhaci, A. Ittipiboon
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    ABSTRACT: It has been a decade since a research program began on reflectarray technology at the Communications Research Centre Canada (CRC). This endeavor has demonstrated the advantages and shortcomings of this technology, the issues that ought to be addressed, and future opportunities. This paper summarizes the outcome of this research in the context of projects that have been carried out, and the resulting insight into reflectarray technology. Design methodology, fabrication process, and measurements results will be briefly discussed for each particular development.
    IEEE Antennas and Propagation Magazine 09/2008; · 1.18 Impact Factor
  • N. Gagnon, A. Petosa, A. Ittipiboon
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    ABSTRACT: A periodic leaky-wave antenna based on a stripline approach was developed to allow for a unidirectional beam at broadside in the K band. Small ground plane width, vertical metallic walls and superstrate layer were used to enhance the performance of the stripline leaky-wave antenna.
    Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on; 12/2007
  • A. Petosa, S. Thirakoune, A. Ittipiboon
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    ABSTRACT: A reconfigurable Fresnel-zone-plate (FZP) antenna, capable of dynamic beam scanning, is introduced. The FZP consists of a series of thin metal shutters, which discretize the antenna aperture into a number of reconfigurable transparent and opaque zones. The shutters are individually controlled to focus the beam at a desired location. Beam scanning of at least +40deg from broadside with a small degradation in gain is possible in one plane using this design. This paper examines the effects of zone discretization on the ideal radiation patterns using full-wave numerical modeling. These effects are then verified by the measurements of a prototype antenna designed at 23 GHz.
    IEEE Antennas and Propagation Magazine 11/2007; · 1.18 Impact Factor
  • S. Thirakoune, A. Petosa, A. Ittipiboon
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    ABSTRACT: A monopole antenna loaded with a dielectric resonator antenna (DRA) has previously been found to offer wideband performance. In this paper the parasitic wire reflectors and directors are added to a DRA-loaded monopole to form a Yagi-like configuration. The effects on bandwidth and directivity are investigated and presented.
    Electromagnetics in Advanced Applications, 2007. ICEAA 2007. International Conference on; 10/2007
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    ABSTRACT: An electromagnetic model for the simulation of the H-plane radiation pattern performance of a class of planar holographic antennas is introduced. The appropriateness of the model, and its use in the optimisation and design of such antennas, is established experimentally
    IET Microwaves Antennas & Propagation 07/2007; · 0.84 Impact Factor
  • D. Guha, Y.M.M. Antar, A. Ittipiboon, A. Petosa, D. Lee
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    ABSTRACT: This letter examines in detail multiple resonance phenomenon responsible for the ultra wideband response of the hybrid monopole-dielectric resonator antenna (DRA). The physical insight gained by this investigation has lead to improved guidelines for designing the antennas for any specified frequency band. These simple guidelines are then verified using both simulated and measured data
    IEEE Antennas and Wireless Propagation Letters 01/2007; · 1.67 Impact Factor
  • D. Guha, Y.M.M. Antar, A. Ittipiboon, A. Petosa, D. Lee
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    ABSTRACT: A new concept of employing hybrid dielectric resonator antenna (DRA) excited by a quarter wave monopole has recently been proposed and examined by a group of researchers. An ultra wide impedance bandwidth (3:1) with monopole-like radiation patterns was achieved theoretically and experimentally. In this paper, we have addressed the same structure aiming to developing a better physical insight into its ultra wideband performance. A thorough study of the resonant modes and the input impedance behaviour in this hybrid antenna structure has been presented using simulated data and electrical parameters like electric current and field distributions and those have been analyzed to understand the physics behind the phenomena. This study ultimately leads to developing a comprehensive design guideline for further investigations and practical applications in different microwave bands.
    Antennas and Propagation, 2006. EuCAP 2006. First European Conference on; 12/2006
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    ABSTRACT: A reflectarray antenna composed of double square rings of variable lengths that are etched on a conductor backed substrate is proposed for bandwidth enhancement. Using this technique, a single layer reflectarray that has a wider bandwidth compared to conventional single layer reflectarrays is designed, fabricated and tested. Measured results demonstrate radiation efficiency close to 52% and 1-dB gain bandwidth of 9%, centered at 22.0 GHz. Another class of ¿loop¿ cell element namely, double cross loop, is also used as the building block of reflectarray and simulation and measurement results that demonstrate a comparable performance in the order of what was achieved for the reflectarray composed of square rings, are presented.
    Antennas and Propagation, 2006. EuCAP 2006. First European Conference on; 12/2006
  • J. Shaker, A. Ittipiboon, M. Cuhaci
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    ABSTRACT: A method is proposed for the fabrication of thick volume holograms for applications in the microwave-frequency band. Artificial dielectric technology is used to realise the transverse modulation of the refractive index. Design guidelines and principles are explained. A prototype is fabricated based on the proposed method and is tested to demonstrate its validity. The efficiency of the prototype in the transmission mode is approximately 70%, which is a typical performance for `thick phase holograms'. To the best of the authors' knowledge, this is the first time that a thick volume hologram is demonstrated in the microwave-frequency band. The same technology has then been used to design and fabricate a multiplexed hologram which contains two sets of interference patterns. Measurements demonstrate high coupling between the corresponding object and reference beams and low crosscoupling between the two sets. It is also demonstrated that this technology can be used to realise beam-splitting which has potential application in power-combining. These particular designs suggest the possibility of duplicating optical holographic applications of the hologram technology in the microwave-frequency band
    IEE Proceedings - Microwaves Antennas and Propagation 11/2006; · 0.49 Impact Factor
  • N. Gagnon, A. Ittipiboon, A. Petosa
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    ABSTRACT: This paper presents a technique to shift the frequency of the leaky-wave stop band, thereby allowing efficient broadside radiation of the n = -1 spatial harmonic. This technique can be used for any periodic antenna structure operating in the leaky-wave band. To demonstrate the technique, a microstrip line over a periodic lattice of holes is investigated. This structure, previously studied in N. Gagnon et al., (2004), was selected due to its simplicity. It is shown that the broadside gain can be significantly improved by periodically perturbing the spacing of the hole lattice
    Antennas and Propagation Society International Symposium 2006, IEEE; 08/2006
  • A. Petosa, A. Ittipiboon, S. Thirakoune
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    ABSTRACT: Not Available
    IEE Proceedings - Microwaves Antennas and Propagation 07/2006; 153(3):270- 276. · 0.49 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A reflectarray antenna composed of double square rings of variable lengths printed on a conductor-backed substrate is proposed for reflectarray-bandwidth enhancement. Using this technique, a single-layer reflectarray of a wider bandwidth compared to conventional single-layer reflectarrays is designed, fabricated, and measured. The measured results demonstrate a radiation efficiency close to 52% and 1-dB gain bandwidth of 9%, centered at 22 GHz. © 2006 Government of Canada. Exclusive worldwide publication rights in the article have been transferred to Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1317–1320, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21630
    Microwave and Optical Technology Letters 06/2006; 48(7):1317 - 1320. · 0.59 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A reflectarray antenna composed of double crossed loops of variable lengths printed on a conductor backed substrate is introduced. Using this technique, a single-layer reflectarray with wider bandwidth compared to conventional single-layer reflectarrays is fabricated and measured. Measured results demonstrate a radiation efficiency close to 55% and 1 dB gain-bandwidth of 10%, centred at 22 GHz.
    Electronics Letters 02/2006; · 1.04 Impact Factor
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    ABSTRACT: Not Available
    Canadian Journal of Electrical and Computer Engineering 02/2006; 31(1):15-24. · 0.33 Impact Factor

Publication Stats

1k Citations
66.91 Total Impact Points

Institutions

  • 1990–2010
    • Kingston College
      Milwaukee, Wisconsin, United States
  • 1993–2007
    • University of Ottawa
      Ottawa, Ontario, Canada
  • 1993–2006
    • Communications Research Centre Canada
      Ottawa, Ontario, Canada
  • 2005
    • Royal Military College of Canada
      • Department of Electrical and Computer Engineering
      Kingston, Ontario, Canada
  • 1981–2003
    • University of Manitoba
      • Department of Electrical and Computer Engineering
      Winnipeg, Manitoba, Canada
  • 1997
    • Comdev Ltd
      Cambridge, Ontario, Canada
  • 1993–1995
    • University of Mississippi
      • Department of Electrical Engineering
      Oxford, MS, United States
  • 1994
    • Carleton University
      Ottawa, Ontario, Canada
  • 1993–1994
    • Hampton VA Medical Center
      Hampton, Virginia, United States
  • 1991
    • University of Saskatchewan
      • Department of Electrical and Computer Engineering
      Saskatoon, Saskatchewan, Canada
  • 1981–1989
    • The University of Winnipeg
      Winnipeg, Manitoba, Canada