Wed, 09 Jul 2008 13:39:29 BST CiteULike: dcastros applications http://www.citeulike.org/user/dcastro/tag/applications CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2801454 <i>Computational Electromagnetics in Time-Domain, 2007. CEM-TD 2007. Workshop on (2007), pp. 1-4.</i><br /><br />RF self-identification and triggering system are suited for the detection of fast moving objects. We developed a system consisting of a fixed transmitter, located in the path side, and of a receiver unit mounted aboard the vehicle. A slotted waveguide antenna array is used in the TX side to accurately define the position of the moving object. The paper describes the characterization of the transmitting antenna that has been designed using numerical simulation based on a home-developed FDTD algorithm. The antenna has been realized and measured, so that a comparison between simulation and experimental data is also reported. FDTD Design of Antennas for Smart Applications: RF Triggering System Case-of-Study F Alimenti P Mezzanotte V Palazzari F Placentino A Scarponi L Roselli doi:10.1109/CEMTD.2007.4373549 Computational Electromagnetics in Time-Domain, 2007. CEM-TD 2007. Workshop on (2007), pp. 1-4. 2008-05-15T12:11:22-00:00 2007 Computational Electromagnetics in Time-Domain, 2007. CEM-TD 2007. Workshop on 1 4 antenna applications design fdtd smart http://www.citeulike.org/user/dcastro/article/2755639 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 46, No. 11. (1998), pp. 1901-1909.</i><br /><br />This paper presents three novel architectures for high-efficiency amplifiers relying on new harmonic-tuning techniques. These methods yield high-efficiency power amplifiers and reduce unwanted harmonic radiation from the transmitter front end. The first method uses the active integrated-antenna approach to perform harmonic tuning. The second method uses a nontraditional periodic microstrip filter, which allows broadband harmonic tuning. Finally, the third method combines the previous two approaches. Each technique is illustrated by a design example of a power amplifier integrated with an antenna. Guidelines for choosing the appropriate antenna structure and for designing the periodic structures are also presented. Another design issue is inclusion of the antenna and/or periodic structures into the amplifier simulation. To do this, a hybrid approach combining the finite-difference time-domain (FDTD) analysis and harmonic-balance simulation is employed Novel architectures for high-efficiency amplifiers for wireless applications V Radisic Y Qian T Itoh doi:10.1109/22.734508 Microwave Theory and Techniques, IEEE Transactions on, Vol. 46, No. 11. (1998), pp. 1901-1909. 2008-05-05T08:06:40-00:00 1998 Microwave Theory and Techniques, IEEE Transactions on 46 11 1901 1909 amplifier applications efficiency high wireless http://www.citeulike.org/user/dcastro/article/2421436 <i>Antennas and Propagation Society International Symposium 2006, IEEE (2006), pp. 1295-1298.</i><br /><br />Support vector machines are a good candidate for the solution of antenna array processing problems such as beamforming and the angle of arrival estimation, because these algorithms provide superior performance in generalization ability and computational complexity. In this work we introduce three new approaches for antenna array beamforming based on support vector machines. The first one is based on the use of the linear support vector regressor. The second algorithm uses a nonlinear multiregressor to find the parameters of a linear beamformer and the third is an implementation of a nonlinear beamformer using a nonlinear support vector machine. Comparisons with conventional beamforming strategies and simulation results are provided to demonstrate the advantages of the support vector machine approach. Antenna array processing for radar applications using support vector machines Nan Xu CG Christodoulou M Martinez-Ramon T Ozdemir doi:10.1109/APS.2006.1710781 Antennas and Propagation Society International Symposium 2006, IEEE (2006), pp. 1295-1298. 2008-02-24T13:26:32-00:00 2006 Antennas and Propagation Society International Symposium 2006, IEEE 1295 1298 antenna applications array processing radar svm http://www.citeulike.org/user/dcastro/article/2373383 <i>Microwave Magazine, IEEE, Vol. 5, No. 1. (2004), pp. 57-67.</i><br /><br />In this article, we summarized the topics of array processing for wideband signals in smart antenna-based applications. For wideband beamforming, the TDF1B and FDFIB methods can provide the frequency-invariant beam-pattern over an arbitrarily wide bandwidth. The FDFIB method is applicable with arbitrary antenna arrays and suitable for switched beams and direction-finding approaches. The frequency-invariant beam-pattern can be designed with prescribed narrow main beam width and low SLL over a wide bandwidth by using two FDFIBs in a spatial interpolation process. For wideband DOA estimation, two main approaches based on the CSS method and beam-space processing has been introduced. The latest approach can provide lower resolution threshold, lower RMSE of estimate, and lower computational complexity. Finally, practical considerations in implementation of an antenna array regarding to array errors and mutual coupling have been considered. In the presence of array errors and mutual coupling, the performance of wideband DOA estimation is strongly degraded. Signal processing for wideband smart antenna array applications Tuan-Do-Hong P Russer doi:10.1109/MMW.2004.1284944 Microwave Magazine, IEEE, Vol. 5, No. 1. (2004), pp. 57-67. 2008-02-14T10:57:52-00:00 2004 Microwave Magazine, IEEE 5 1 57 67 antenna applications array processing signal smart wideband