Abstract
An electronically controllable, switched parasitic planar array can be used for the purpose of direction finding. The method proposed in this paper exploits the electronic beam steering, achieved by simply inserting an appropriate digital word in the antenna feeding circuit, to resolve two signals. A genetic algorithm was used to determine the strengths and the angular positions of the incoming signals in the azimuth plane. The results obtained concentrate on wideband signaling in a multipath environment, with and without the presence of noise. The antenna design and the reliability of the direction-finding method are presented. The proposed method is strongly dependent on the type of the receiving antenna (a switched parasitic planar array is superior to a ``uniform'' antenna with identical radiation patterns). Increasing the number of radiation patterns available improves the reliability of the method. The reliability of the method slightly deteriorates, as the angular discrimination of the incoming signals becomes smaller, but the results remain quite satisfying.
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A. Lozano, F.R. Farrokhi and R.A. Valenzuela, “Lifting the Limits on High-speed Wireless Data Access Using Antenna Arrays”, IEEE Communications Magazine, pp. 156–162, 2001.
J.C. Liberti and T.S. Rappaport, Smart Antennas for Wireless Communications, Prentice Hall: New Jersey, 1999.
A.-J. van der Veen, M.C. Vanderveen and A. Paulraj, “Joint Angle and Delay Estimation Using Shiftinvariance Techniques”, IEEE Transactions on Signal Processing, Vol. 46, No. 2, pp. 405–418, 1998.
P.K. Varlamos and C.N. Capsalis, “Electronic Beam Steering Using Switched Parasitic Smart Antenna Arrays”, Progress in Electromagnetics Research, PIER 36, pp. 101–119, 2002.
D.V. Thiel, S.G. O'Keefe and J.W. Lu, “Electronic Beam Steering inWire and Patch Antenna Systems Using Switched Parasitic Elements”, IEEE Antennas Propagat. Soc. URSI Radio Sci. Meet, Baltimore, MD, July 1996, pp. 534–537.
S.L. Preston, D.V. Thiel, J.W. Lu, S.G. O' Keefe and T.S. Bird, “Electronic Beam Steering Using Switched Parasitic Patch Elements”, Electronics Letters, Vol. 33, No. 1, pp. 7–8, 1997.
N.L. Scott, M.O. Leonard-Taylor and R.G. Vaughan, “Diversity Gain from a Single-port Adaptive Antenna Using Switched Parasitic Elements Illustrated with a Wire and Monopole Prototype”, IEEE Transactions on Antennas and Propagation, Vol. 47, No. 6, pp. 1066–1070, 1999.
R. Schlub, D.V. Thiel, J.W. Lu and S.G. O'Keefe, “Dual-band Switched-parasitic Wire Antennas for Communications and Direction Finding”, Microwave Conference, 2000 Asia-Pacific, 2000, pp. 74–78.
R. Schlub, D.V. Thiel, J.W. Lu and S.G. O'Keefe, “Dual-band Six-element Switched Parasitic Array for Smart Antenna Cellular Communications Systems”, Electronics Letters, Vol. 36, No. 16, pp. 1342–1343, 2000.
A.H. El Zooghby, C.G. Christodoulou and M. Georgiopoulos, “A Neural Network-based Smart Antenna for Multiple Source Tracking”, IEEE Transactions on Antennas and Propagation, Vol. 48, No. 5, pp. 768–775, 2000.
S.L. Preston and D.V. Thiel, “Direction Finding Using a Switched Parasitic Antenna Array”, IEEE Antennas Propagat. Soc. URSI Radio Sci. Meet, Montreal, Canada, July 1997, pp. 1024–1027.
S.L. Preston, D.V. Thiel, J.W. Lu, S.G. O' Keefe and T.A. Smith, “Base-station Tracking in Mobile Communications Using a Switched Parasitic Antenna Array”, IEEE Transactions on Antennas and Propagation, Vol. 46, No. 6, pp. 841–844, 1998.
T. Svantesson and M. Wennstrom, “High-resolution Direction Finding Using a Switched Parasitic Antenna”, in Proceedings of the 11th IEEE Signal Processing Workshop on Statistical Signal Processing, 2001, pp. 508–511.
D.E. Goldberg, Genetic Algorithms in Search, Optimization, and Machine Learning, Addison-Wesley Publishing Company, Inc., 1989.
E.A. Jones and W.T. Joines, “Design of Yagi-Uda Antennas Using Genetic Algorithms”, IEEE Transactions on Antennas and Propagation, Vol. 45, No. 9, pp. 1386–1392, 1997.
C.R. Houck, J.A. Joines and M.G. Kay, “A Genetic Algorithm for Function Optimization: A Matlab Implementation”, http://www.ie.ncsu.edu:80/mirage/GAToolBox/gaot/
C.A. Balanis, Antenna Theory, Analysis and Design, 2nd edn, John Wiley and Sons, 1997.
P.K. Varlamos and C.N. Capsalis, “Design of a Six-sector Switched Parasitic Planar Array Using the Method of Genetic Algorithms”, Wireless Personal Communications, Vol. 26, No. 1, pp. 77–88, 2003.
K. Pahlavan and A. Levesque, Wireless Information Networks, John Wiley & Sons, Inc.: New York, pp. 50–56, 1995.
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Varlamos, P.K., Capsalis, C.N. Direction-of-Arrival Estimation (DoA) Using Switched Parasitic Planar Arrays and the Method of Genetic Algorithms. Wireless Personal Communications 28, 59–75 (2004). https://doi.org/10.1023/B:WIRE.0000015382.62938.1c
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DOI: https://doi.org/10.1023/B:WIRE.0000015382.62938.1c