Sun, 06 Jul 2008 11:07:01 BST CiteULike: dcastros Bosisio http://www.citeulike.org/user/dcastro/author/Bosisio CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2923786 <i>Microwave Magazine, IEEE, Vol. 9, No. 1. (2008), pp. 89-100.</i><br /><br />Radio communications in the past century have relied primarily on nonlinear devices to modulate and demodulate signals for wireless transmissions. This article reviews initial laboratory results obtained with new radios using linear interferometers to modulate and demodulate ultra-wide-band (UWB) signals. Automotive and chip fabrication industries apply such interferometers in new commercial radios for UWB communications. New-Wave Radio RG Bosisio YY Zhao XY Xu S Abielmona E Moldovan YS Xu M Bozzi SO Tatu C Nerguizian JF Frigon C Caloz K Wu doi:10.1109/MMM.2007.910923 Microwave Magazine, IEEE, Vol. 9, No. 1. (2008), pp. 89-100. 2008-06-24T14:14:00-00:00 2008 Microwave Magazine, IEEE 9 1 89 100 radio uwb http://www.citeulike.org/user/dcastro/article/2762104 <i>Microwave Symposium Digest, 1994., IEEE MTT-S International (1994), pp. 1473-1476 vol.3.</i><br /><br />A novel technique is proposed for the measurements of the transducer power gain and noise figure of the amplifier embedded in a receiving active antenna, where the direct measurements with traditional techniques are impossible. The bandwidth of the active antenna can be also determined with this technique. The good agreement between the measurements and calculations of a number of active receiving microstrip antennas shows the validity of the measurement technique. This makes it possible to characterize all the performance of receiving active antennas A novel measurement technique for amplifier-type active antennas H An BKJC Nauwelaers AR Van de Capelle RG Bosisio doi:10.1109/MWSYM.1994.335133 Microwave Symposium Digest, 1994., IEEE MTT-S International (1994), pp. 1473-1476 vol.3. 2008-05-06T17:19:23-00:00 1994 Microwave Symposium Digest, 1994., IEEE MTT-S International 1473 1476 vol.3 active amplifier antenna measurement