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FEA Evaluation of the Mechanical and Electromagnetic Performance of Slot Log-Spiral Antennas in Conformal Load-Bearing Antenna Structure (CLAS)

[+] Author Affiliations
Ali Daliri, Chun H. Wang, Sabu John

RMIT University, Bundoora, VIC, Australia

Amir Galehdar, Wayne S. T. Rowe, Kamran Ghorbani

RMIT University, Melbourne, VIC, Australia

Paul J. Callus

Defence Science and Technology Organisation, Fishermans Bend, VIC, Australia

Paper No. SMASIS2011-5137, pp. 613-624; 12 pages
  • ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1
  • Scottsdale, Arizona, USA, September 18–21, 2011
  • ISBN: 978-0-7918-5471-6
  • Copyright © 2011 by ASME and The Commonwealth of Australia


Conformal load-bearing antenna structures (CLAS) have been attracting the attention of aerospace industries in recent years. This type of multifunctional structures combines the features of conventional antennas with load-bearing capacity and has important applications in military and commercial airplanes especially for Unmanned Aerial Vehicles (UAVs). Equiangular slot spiral antennas are an alternative to traditional rectangular slots because of its wideband radiation characteristics. However, the mechanical characteristics of such a spiral antenna integrated into a structure are so far largely unexplored. In this paper, the electromagnetic (scattering parameter, radiation pattern and gain) and mechanical properties (stress concentration factor (SCF)) of spiral antennas is investigated using finite element analysis (FEA). The results lead to a recommendation for using this type of antenna for future CLAS concepts.

Copyright © 2011 by ASME and The Commonwealth of Australia



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