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ispartof: IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting (APURSI) ispartof: IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting (APURSI) location:Spokane, Washington, USA date:3 Jul - 8 Jul 2011 status: published

Electronically controlled beam steering array antennas highly increase the performance of telecommunication links by improving the link budget. Moreover, digital (baseband) beam steering includes the possibility of having multiple beams simultaneously and of communicating with more than one user at the same time. The basics of digital beam forming are explained in this paper. A 1x2 prototype array with digital beam steering is introduced and measurement results are shown. ispartof: pages:1-4 ispartof: 49th FITCE CONGRESS PROCEEDINGS pages:1-4 ispartof: 49th FITCE CONGRESS location:Santiago de Compostela, Spain date:1 Sep - 4 Sep 2010 status: published

In this paper, a new design of a loaded cross dipole antennas (LCDA) with an omni-directional radiation pattern in the horizontal plane and broad-band characteristics is investigated. An efficient optimization procedure based on a genetic algorithm is employed to design the LCDA and to determine the parameters working over a 25:1 bandwidth. e simulation results are compared with measurements. ispartof: pages:763-766 ispartof: European Microwave Conference vol:1 pages:763-766 ispartof: European Microwave Conference location:Rome, ITALY date:29 Sep - 1 Oct 2009 status: published

End-wall waveguide-to-microstrip splitters are highly favourable to feed series' fed microstrip arrays. The presented topology of a double slot microstrip transition clearly shows distinct advantages. To investigate the effect of substrate material and thickness on this kind of transition three different substrates are used for the transition design. Simulation and measurement results are compared. Finally, one of the designs is applied to feed an antenna array. ispartof: pages:1180-1182 ispartof: 2009 3RD EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION vol:1 pages:1180-1182 ispartof: European Conference on Antennas and Propagation location:Berlin date:23 Mar - 27 Mar 2009 status: published