In brief

Abstract

PAGE 1615 An algorithm using backlog information for slot allocation in satellite-based sensor systems based on Quality of Service (QoS) fairness has been developed by a team from China. The group used delay performance as a measure of QoS, and focussed on long term rather than short term fairness. PAGE 1584 A group based in Germany have used liquid crystal as a tuneable dielectric material to produce a continuously tuneable substrate integrated waveguide band pass filter. The device has a high Q-factor comparable to substrate integrated waveguides with other types of tuneable material, but achieves operating frequencies ten times as high. Simulations show that the system could improve performance by at least 10% PAGE 1587 Authors from the USA present a useful document on achieving and maintaining two decades of bandwidth with monolithic microwave integrated circuit (MMIC) distributed amplifiers. According to the authors, achieving this level of performance can be difficult even when suppliers indicate it can be achieved with their devices. The filter is continuously tuneable within a tuning range of 610 MHz PAGE 1563 Using leather as a substrate, a team from India have designed and fabricated a tri-band substrate integrated waveguide based antenna. The antenna, which uses a combination of conducting and non-conducting leather materials, is compact and flexible, and directs radiation away from the user. The paper also outlines ways to improve devices with lower performance PAGE 1591 The performances and architecture of a multilevel driver for Pulse Amplitude Modulation (PAM) formats is reported on by a team based in France and the USA. The device is designed and fabricated in InP double-heterojunction bipolar transistor technology, and is developed for short reach and long haul networks. The antenna is designed for use in the ISM, WiMAX and Military Applications bands The device can generate PAM-2, PAM-4 and PAM-8 outputs