ITEE Ph.D confirmation seminar: Serguei Zagriatski, 12.00PM, Thu 10 Jul 2003

Radial Line Slot Array Antenna for Wireless Local Area Network Applications

Speaker: Serguei Zagriatski, ITEE

When: 12.00PM, Thursday 10 Jul 2003

Venue: 78-622

Host: A/Prof Marek Bialkowski

Abstract:

  Wireless Local Area Network (WLAN) applications are new, fast
  growing telecommunication protocols operating mainly in a free
  Industry-Scientific-Medicine (ISM) frequency bands. The choice of
  free frequency bands make then very attractive from commercial point
  of view. The systems require suitable antennas for point to point or
  from point to multipoint communications. In order to attract the
  commercial market, these antennas have to feature low manufacturing
  cost and pleasing aesthetic appearance.  Radial Line Slot Array
  (RLSA) antennas seem to provide such required features. So far, the
  design, development of these low-cost and low-profile antennas have
  been for satellite communications. In this case, the RLSA antenna
  has to feature moderate to high gain and as a result it may be
  formed by thousand of slots. The present report focuses on the
  design and development of Radial Line Slot Array antenna for
  Wireless Local Area Network applications in indoor environment. In
  this case, the RLSA antennas of low gain are required.

  The report introduces various WLAN protocols such as IEEE 802.11 and
  Bluetooth utilising free ISM band for which RLSA antennas are aimed
  to be designed.  The antenna specifications include parameters such
  as frequency, bandwidth, polarization and gain. Following that the
  simulation tools for antenna design are introduced. The commercially
  available antenna design and simulation packages are augmented by
  own developed software.

  Theoretical results are obtained to satisfy good return loss
  requirements and specific radiation pattern shapes. Parameter study
  of various antenna mechanical parameters is discussed and
  optimization procedure is developed.  Discussion on level of
  influence of each mechanical parameter on return loss characteristic
  is also presented. The report finishes with conclusion where
  different issues of design procedure and future work are discussed.
  In particular, a new type of slot antennas utilizing a post-wall
  waveguide structure is introduced for operation at upper microwave
  frequencies. The analysis methods of these new waveguiding and
  radiating structures are introduced and described.  Also new
  conformal configuration of RLSA for WLAN is proposed.

Biography:

  Serguei Zagriatski graduated with a Bachelor of Engineering
  (Radiotechnics) degree from Moscow Power Engineering Institute ,
  Technical University (Russia, Moscow) in 1999.

  He has also graduated with Postgraduate Diploma in
  Telecommunications from the Royal Melbourne institute of Technology
  (Melbourne, Australia) in 2001.

  He is currently undertaking a PhD program in the area of Antenna
  Systems and Microwave Engineering at the University of
  Queensland. His research interests include slot antennas, conformal
  arrays, microwave engineering and wireless communications.

Type:

Ph.D confirmation

Contact:

A/Prof Marek Bialkowski, seminar host (meb@itee.uq.edu.au)
or Guido Governatori (ITEE seminar co-ordinator) (guido@itee.uq.edu.au)

ITEE seminar web page: http://www.itee.uq.edu.au/~seminar

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