Thu, 24 Jul 2008 23:20:25 BST CiteULike: dcastros antennas http://www.citeulike.org/user/dcastro/tag/antennas CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/3025775 <i>Antennas and Propagation Magazine, IEEE, Vol. 40, No. 3. (1998), pp. 104-108.</i><br /><br />SABOR (software de analisis de bocinas y reflectores) is an antenna-analysis approach for the computation of horn- and reflector-antenna performance. The program covers and expands topics already developed with other software. The program can analyze almost any kind of horn (E and H pyramidal horns, circular horns, corrugated horns). The current configuration of SABOR can also analyze centered and offset parabolic reflectors, dual-offset Cassegrain and Gregorian reflectors, and centered Cassegrain systems. For feeding reflectors, the program allows use of the classical cos^q pattern and any of the horn mentioned above. Usage of real horns improves the accuracy of computed efficiencies and the simulation of the cross-polar radiation SABOR: a fast analysis tool for horn and reflector antennas JL Volakis doi:10.1109/74.706107 Antennas and Propagation Magazine, IEEE, Vol. 40, No. 3. (1998), pp. 104-108. 2008-07-21T22:10:01-00:00 1998 Antennas and Propagation Magazine, IEEE 40 3 104 108 antennas simulation http://www.citeulike.org/user/dcastro/article/2836667 <i>Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 30, No. 6. (1982), pp. 1191-1196.</i><br /><br />A moment method solution to the problem of input impedance and mutual coupling of rectangular microstrip antenna elements is presented. The formulation uses the grounded dielectric slab Green's function to account rigorously for the presence of the substrate and surface waves. Both entire basis (EB) and piecewise sinosoidal (PWS) expansion modes are used, and their relative advantages are noted. Calculations of input impedance and mutual coupling are compared with measured data and other calculatious. Input impedance and mutual coupling of rectangular microstrip antennas D Pozar Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 30, No. 6. (1982), pp. 1191-1196. 2008-05-27T07:13:09-00:00 1982 Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988] 30 6 1191 1196 antennas impedance input microstrip http://www.citeulike.org/user/dcastro/article/2802015 <i>Electronics Letters, Vol. 35, No. 25. (1999), pp. 2163-2164.</i><br /><br />Active receiving antennas with an integrated filter, amplifier, mixer and local oscillator have significant radiation at the local oscillator frequency. This radiation may be out of band and could be a problem in cluttered environments. In this Letter, the problem is evaluated through measurements and simulation on integrated microstrip patch antennas Local oscillator radiation from active integrated antennas G Ma PS Hall P Gardner M Hajian doi:10.1049/el:19991482 Electronics Letters, Vol. 35, No. 25. (1999), pp. 2163-2164. 2008-05-15T15:30:24-00:00 1999 Electronics Letters 35 25 2163 2164 active antennas integrated local oscillator http://www.citeulike.org/user/dcastro/article/2774784 <i>Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 30, No. 4. (1982), pp. 645-650.</i><br /><br />Using Richmond's reaction integral equation, an expression is derived for the input impedance of microstrip patch antennas excited by either a microstrip line or a coaxial probe. The effects of the finite substrate thickness, a dielectric protective cover, and associated surface waves are properly included by the use of the exact dyadic Green's function. Using the present formulation the input impedance of a rectangular microstrip antenna is determined and compared with experimental and earlier calculated results. Input impedance of microstrip antennas M Deshpande M Bailey Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 30, No. 4. (1982), pp. 645-650. 2008-05-09T08:41:23-00:00 1982 Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988] 30 4 645 650 antennas impedance input microstrip http://www.citeulike.org/user/dcastro/article/2762101 <i>Antennas and Propagation Society International Symposium, 1978, Vol. 16 (1978), pp. 268-272.</i> Broadband microstrip resonator antennas H Pues J Vandensande A Van de Capelle K Leuven Antennas and Propagation Society International Symposium, 1978, Vol. 16 (1978), pp. 268-272. 2008-05-06T17:19:02-00:00 1978 Antennas and Propagation Society International Symposium, 1978 16 268 272 antennas broadband microstrip resonator http://www.citeulike.org/user/dcastro/article/2702646 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 42, No. 12. (1994), pp. 2186-2194.</i><br /><br />The development of active integrated antennas is reviewed in this paper. The circuit structures of different types of active integrated antennas are discussed. Various circuits integrating solid state devices and low-profile passive antenna elements are demonstrated. The applications in quasi-optical power combining arrays and beam-scanning phased arrays are reviewed. By using the modern MIC and MMIC fabrication technology, compact, light-weight, and low-cost active integrated antennas are realized. In addition, nonlinear electromagnetic simulations of active integrated antennas are discussed Active integrated antennas Jenshan Lin T Itoh doi:10.1109/22.339741 Microwave Theory and Techniques, IEEE Transactions on, Vol. 42, No. 12. (1994), pp. 2186-2194. 2008-04-22T18:09:56-00:00 1994 Microwave Theory and Techniques, IEEE Transactions on 42 12 2186 2194 active antennas integrated http://www.citeulike.org/user/dcastro/article/2421564 <i>Electronics Letters, Vol. 31, No. 16. (1995), pp. 1319-1320.</i><br /><br />A new ray-based simulation methodology for an adaptive antenna system is presented. Results for a typical microcellular environment highlight the behaviour of the adaptive antenna, and DS-CDMA capacity analysis illustrates the capacity enhancement attainable. For the cases considered, a minimum five fold increase in the overall spectrum efficiency is predicted for an eight-element adaptive antenna array employing the RLS algorithm DS-CDMA capacity enhancement with adaptive antennas GV Tsoulos MA Beach SC Swales Electronics Letters, Vol. 31, No. 16. (1995), pp. 1319-1320. 2008-02-24T13:43:49-00:00 1995 Electronics Letters 31 16 1319 1320 adaptive antennas array capacity cdma smart http://www.citeulike.org/user/dcastro/article/2421499 <i>Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 9, No. 2. (1961), pp. 140-153.</i><br /><br />A microwave antenna can be designed in the form of two reflecting dishes and a feed, based on the principle of the Cassegrain optical telescope. There are a variety of shapes and sizes available, all described by the same set of equations. The essential performance of a Cassegrain double-reflector system may be easily analyzed by means of the equivalent-parabola single-reflector concept. Techniques are available for reducing the aperture blocking by the sub dish of the Cassegraln system: one method minimizes the blocking by optimizing the geometry of the feed and sub dish; other methods avoid the blocking by means of polarization-twisting schemes. The former method yields good performance in a simple Cassegrain antenna when the beamwidth is about<tex>1deg</tex>or less. The latter methods are available for any application not requiring polarization diversity, and an optimized set of polarization-operative surfaces has been developed for these twisting Cassegrain antennas. Experimental results, presented for practical antennas of both types, illustrate the feasibility of these principles. A number of unusual benefits have been obtained in the various Cassegrain antenna designs, and additional interesting features remain to be exploited. Microwave antennas derived from the cassegrain telescope P Hannan Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 9, No. 2. (1961), pp. 140-153. 2008-02-24T13:37:07-00:00 1961 Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988] 9 2 140 153 antennas cassegrain microwave http://www.citeulike.org/user/dcastro/article/1804106 <i>Vehicular Technology Magazine, IEEE, Vol. 1, No. 1. (2006), pp. 8-17.</i><br /><br />Aim of this contribution is to illustrate the state of the art of smart antenna research from several perspectives. The bow is drawn from transmitter issues via channel measurements and modeling, receiver signal processing, network aspects, technological challenges towards first smart antenna applications and current status of standardization. Moreover, some future prospects of different disciplines in smart antenna research are given. Antennas: state of the art H Boche A Bourdoux JR Fonollosa T Kaiser A Molisch W Utschick doi:10.1109/MVT.2006.1663946 Vehicular Technology Magazine, IEEE, Vol. 1, No. 1. (2006), pp. 8-17. 2007-10-22T04:42:09-00:00 2006 Vehicular Technology Magazine, IEEE 1 1 8 17 antennas array diversity mimo smart