On the correlation between eye-diagram and frequency characteristics of GaAs-HBT TWAs for 20 and 40 Gbps NRZ signals Chafik Meliani and Matthias Rudolph Abstract -- The capabilities of the GaAs HBT technology in terms of maximum bit rates and output amplitudes for TWAs are studied investigating the correlation between cut-off frequency, gain shape and ripple, and eye diagrams. Particularly, it tur

Micro-mirrors for a multifocus terahertz imaging system Christian Jordens', Mohammed Salhi', Tomasz Hasek', Gunter Thorwirth2, Ute Bottger3 and Martin Koch' Abstract -- We present concave micro mirrors for the use in a future multifocus terahertz (THz) imaging system. The optical design of the micro minors is carried out using the ray tracing software ZEMAX. The minors are fabricated out of alumin

Large-signal modelling of AIGaN/GaN HEMTs with analytically calculated thermal resistance E. Jutzi', I. Dettmann', M. Berroth', H. Roll2, and H. Schweizer' AlGaN/Abstract -- A large-signal equivalent circuit model of HEMTs grown on sapphire substrate with gate width Wg = 2 x 150 p.m and gate length L g = 1 µm is presented. The drain-source current equations include a term that accurately models th

EUROPEAN MICROWAVE ASSOCIATION EuMA Editorial For this Issue of the European Microwave Association Proceedings, selected authors of outstanding papers which have been presented at the 2nd German Microwave Conference GeMiC2006 in Karlsruhe, Germany had been invited to submit a long journal version of their paper. Hence, these papers are not dedicated to a specific topic but rather represent the w

A single carrier frequency domain equalization prototype system Mario Huemer1 and Steffen Reinhardt' -- In this paper we describe an SC/FDE (Single Carrier transmission with Frequency Domain Equalization) prototype system operating in the 2.4 GHz band. The system is based on an off-the-shelf 802.11b WLAN (Wireless Local Area Network) front-end module, on specially designed mixed signal boards for

A SiGe monocycle impulse generator for impulse radio ultra-wideband applications Jochen Dederer', Andreas Trasser2 and Hermann Schumacher' Abstract -- A compact 0.56 mm x 0.56 mm SiGe HBT ultrawideband (UWB) impulse generator is presented. The realized circuit generates ultra-short, symmetrical impulses with a peakto-peak amplitude of 260 mV. The spectrum of the generated impulses has a -10 dB ban

A novel technique for the accurate design of dichroic mirrors for focused beam waveguide deep-space antennas Piermario Besso1, Maurizio Bozzi2 , Marco Formaggi2 , Simone Germania, Marco Pasian2 and Luca Perregrini2 Abstract -- This paper presents a novel technique for the design of dichroic mirrors, used in deep-space antennas with focused beam-waveguide feeding system. The design of such dichroic

3D Ultra wide band antennas with controlled stop band Ismael Pelé, Anne Chousseaud and Serge Toutain Abstract -- This paper presents volume Ultra Wideband antennas modified to incorporate a filtering function. The solution consists in creating stubs in the shape of the antenna. Two particular topologies are studied and modified to include the filtering function. This function is modelized to contr

EuMA PEAN MICROWAVE ASSOCIATION EuNA Special Issue - EUMA on Smart Antennas Fifteen years ago the adjective smart was reserved for certain people. The word characterized those displaying excellent performance, those that were well adapted to special situations and occasions. Many things have since become smart, from cars and cards to finally also antennas. But how can antennas be smart? The ans

Sectorized antennas for CDMA based ad hoc networks at 60 GHz Alexandre Boé', Laurent Clavier", Rodrigue Okouyi1,2, Nathalie Rolland' and Paul Alain Rolland' Abstract -- We consider the benefits of directive antennas in an ad hoc network in the 60 GHz band. The physical layer is based on DS-CDMA and the multipaths channel is modeled by a Tapped Delay Line. If CDMA ensures the multiple access, it su