This paper presents a dual-band planar antenna array for ISM band applications (2.4 GHz and 2.45 GHz). This antenna is proposed for indoor applications and enables adaptive beamforming and angle of arrival (AOA) estimation. An adaptive beamforming algorithm is applied for a planar antenna array, which is able to steer its main beam and nulls in azimuth and elevation planes over a wide frequency band. Planar antenna array operates as a spatial filter in 3D space, processing the received signals with weighting schemes. A planar antenna array is designed for AOA estimation in azimuth and elevation planes by using MUltiple SIgnal Classification (MUSIC) based on subspace algorithm. The Base Station (BS) equipped with this planar antenna is preferred to be at the center position on the room ceiling to cover all sectors of the room. It is designed to use four directional triangular elements arranged to form a square planar antenna array. Planar antenna with four elliptical slotted triangular elements (PAFESTE) is used to obtain optimal directivity in four directions in azimuth plane with specific orientation of 30? in elevation plane. It is characterized by half power beamwidth in elevation plane of about 60? and half power beamwidth in azimuth plane of about 90?.
References
[1]
Cidronali, A., Maddio, S., Giorgetti, G., Magrini, I., Gupta, S.K.S. and Manes, G. (2009) Smart Antenna System Design for Localization of Wireless Capsule. IEEE MTT-S International Microwave Symposium Digest, Boston, 7-12 June 2009, 1553-1556.
[2]
Kong, X., Jin, J. and Zhao, L.L. (2011) Design and Analysis of the New Rectangular Planar Smart Antenna. IEEE WiCOM International Conference, Wuhan, 23-25 September 2011, 1-4.
[3]
Reza, K.J. and Ahmad, M.Y. (2014) Smart Antenna System Design for Localization of Wireless Capsule. IEEE IMWS- Bio International Conference, London, 8-10 December 2014. http://dx.doi.org/10.1109/imws-bio.2014.7032461
[4]
Abbas, S.M., Ali, R.L., Nawaz, H., Saleem, I. and Khan, S.A. (2012) Microstrip Antenna Array for Beamforming Systems. Journal of Przeglad Elektrotechniczny, 11, 170-173.
[5]
Di Filippo, M., Lucci, L., Marabissi, D. and Selleri, S. (2015) Design of a Smart Antenna for Mobile Ad Hoc Network Applications. International Journal of Antennas and Propagation, 1-7. http://dx.doi.org/10.1155/2015/273047
[6]
Patnaik, N. (2015) DOA Estimation Algorithm for Smart Antennas—An Investigation. International Journal of Innovative Science and Modern Engineering, 3, 43-47.
[7]
Shi, M., Lu, J. and Ireland, D. (2005) Smart Patch Antenna for Indoor Mobile Wireless Computing. Proceedings of IEEE APMC, Suzhou, 4-7 December 2005.
[8]
High-Frequency Structure Simulator, HFSS v. 10.1.2, Trademark of Ansoft Corporation, Four Station Square, Pittsburgh, USA.
[9]
Gross, F.B. (2005) Smart Antennas for Wireless Communications: With MATLAB. McGraw-Hill, Inc.
[10]
Balanis, C.A. and Ioannides, P.I. (2003) Smart Antenna Systems for Mobile Communications. Ecole Polytechnique Fédérale de Lausanne.
[11]
Monti, G., Corchia, L. and Tarricone, L. (2012) Planar Bowtie Antenna with a Reconfigurable Radiation Pattern. Pro- gress in Electromagnetics Research C, 28, 61-70. http://dx.doi.org/10.2528/PIERC12021104
[12]
Stevanovíc, I., Skrivervik, A. and Mosig, J.R. (2007) Introduction to Smart Antennas. Morgan & Claypool, San Rafael.
[13]
Cidronali, A., Maddio, S., Giorgetti, G. and Manes, G. (2010) Analysis and Performance of a Smart Antenna for 2.45- GHz Single-Anchor Indoor Positioning. IEEE Transactions on Microwave Theory Techniques, 58, 21-31.
http://dx.doi.org/10.1109/TMTT.2009.2035947
[14]
Thazeen, S., Sreepathi, V. and Saqhib, M.N. (2015) High Resolution Method for DOA Estimation. International Jour- nal of Technical Research and Applications, 3, 215-216.
