Radial Line Slot Array Antenna for Wireless Local Area Network Applications
Speaker: Serguei Zagriatski, ITEE
When: 2003-07-10 12:00:00
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)