Thu, 24 Jul 2008 23:52:08 BST CiteULike: dcastro's Dahele http://www.citeulike.org/user/dcastro/author/Dahele CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/3025726 <i>Antennas and Propagation Society International Symposium, 1989. AP-S. Digest (1989), pp. 458-462 vol.1.</i><br /><br />It is demonstrated that a thick patch with an annular gap matching capacitor is an optimum element from a practical design point of view, giving wide bandwidth operation, although at the expense of poor cross polarization. Feed inductance and radiation pattern effects are examined and a new patch equivalent circuit is developed that gives significantly improved results over the existing lumped element model Microstrip patch antennas on thick substrates PS Hall JS Dahele PM Haskins doi:10.1109/APS.1989.134719 Antennas and Propagation Society International Symposium, 1989. AP-S. Digest (1989), pp. 458-462 vol.1. 2008-07-21T21:51:11-00:00 1989 Antennas and Propagation Society International Symposium, 1989. AP-S. Digest 458 462 vol.1 antenna microstrip patch http://www.citeulike.org/user/dcastro/article/2782007 <i>Phased Arrays, IEE Colloquium on (1991), pp. 9/1-9/4.</i><br /><br />The integration of circuit and antennas functions to form active radiating elements is an important area of interest for future phased arrays. Radiation from active circuits is analysed using equivalent source method and results presented for isolated transistors and transistor amplifiers. An active patch element with application to phased arrays is then described Microstrip active antennas PS Hall PM Haskins JS Dahele Phased Arrays, IEE Colloquium on (1991), pp. 9/1-9/4. 2008-05-09T23:43:12-00:00 1991 Phased Arrays, IEE Colloquium on 9/1 9/4 active antenna microstrip http://www.citeulike.org/user/dcastro/article/2619473 <i>Antennas and Propagation Society International Symposium, 1983, Vol. 21 (1983), pp. 55-58.</i> Mode characteristics of annular-ring and cirular-disc microstrip antennas with and without airgaps Kai Lee J Dahele Antennas and Propagation Society International Symposium, 1983, Vol. 21 (1983), pp. 55-58. 2008-04-01T11:16:22-00:00 1983 Antennas and Propagation Society International Symposium, 1983 21 55 58 antenna microstrip patch ring shorted http://www.citeulike.org/user/dcastro/article/2182162 <i>Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 35, No. 11. (1987), pp. 1281-1285.</i><br /><br />Experimental results of a dual-frequency microstrip antenna consisting of two stacked annular rings of outer radii 5 cm and inner radii 2.5 cm are presented. Fabricated on a Duroid substrate with relative permittivity 2.32 and thickness 0.159 cm, the separations of the two resonant frequencies range from 6.30-9.36 percent for the first three modes. The frequency separations can be altered by means of an adjustable air gap between the lower ring and the upper substrate. Dual-frequency stacked annular-ring microstrip antenna J Dahele K Lee D Wong Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988], Vol. 35, No. 11. (1987), pp. 1281-1285. 2007-12-30T21:31:54-00:00 1987 Antennas and Propagation, IEEE Transactions on [legacy, pre - 1988] 35 11 1281 1285 antenna dual-band microstrip