Thu, 07 Aug 2008 21:55:35 BST CiteULike: dcastro's Ortega http://www.citeulike.org/user/dcastro/author/Ortega CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2774607 <i>Microwave Symposium Digest, 1998 IEEE MTT-S International, Vol. 2 (1998), pp. 455-458 vol.2.</i><br /><br />This paper describes a high efficiency amplifier that uses the load presented by a patch antenna to work in class “E”. The resulting set is a high efficiency transmitting active antenna. The dimensions, shape and location of the feeding point in the antenna are selected to obtain an input impedance to force the transistor to work in class “E” at 885 MHz with very high collector efficiency: ηc=90%@Vcc=12.5, Pout=1.5 W High efficiency mode “E” amplifier powers high efficiency active transmitting patch antenna Ortega Asensio Gonzalez Jimenez Martin doi:10.1109/MWSYM.1998.705031 Microwave Symposium Digest, 1998 IEEE MTT-S International, Vol. 2 (1998), pp. 455-458 vol.2. 2008-05-09T07:26:00-00:00 1998 Microwave Symposium Digest, 1998 IEEE MTT-S International 2 455 458 vol.2 active amplifier antenna efficiency high patch transmitter