Saab AB

About: Saab AB is a company organization based out in Thun, Switzerland. It is known for research contribution in the topics: Signal & Antenna (radio). The organization has 862 authors who have published 928 publications receiving 8807 citations. The organization is also known as: Saab AB & Svenska Aeroplan AB.

Overview of the MAGNUS project

Abstract: From 2005 to 2009, the European Defense Agency (EDA) supported the KORRIGAN project, aimed at establishing a European supply chain for the manufacturing of GaN HEMT devices and MMICs. This paper describes one follow-up programme, called MAGNUS (“GaN with UMS GH25 process”) fully dedicated to MMICs and module design using the quarter micron GaN on SiC process, provided by United Monolithic Semiconductors (UMS). The MMIC demonstrators are advanced circuits designed by 7 partners from 5 contributing countries. More than 30 circuits have been designed for each of two foundry runs, including HPAs, robust LNAs, mixers, power switches and multifunction MMICs, working at X-band and in wide bands (one octave and more, at frequencies ranging from 2 GHz to 20 GHz). MAGNUS ended in December 2015 with MMICs demonstrating performances at the state-of-the-art using a European GaN Foundry.

Optimizing the Signal-to-Noise and Distortion Ratio of a GaN LNA using Dynamic Bias

Abstract: This paper shows how the signal-to-noise and distortion ratio (SNDR) for low noise amplifiers (LNA) can be derived from the commonly specified parameters noise figure, gain, third order output intercept point and 1 dB compression point. The parameters dependency of the biasing of the amplifier are also incorporated which enables the possibility to study how SNDR can be optimized for different operating conditions by dynamically change the gate- and drain voltage. An experimental verification shows that improvements in SNDR can be achieved by selecting gate- and drain voltage of the LNA according to the level of the input signal power.

Vacuum-Assisted Hot-Forming Using Tailored Laminate Temperature

Abstract: A non-isothermal vacuum assisted hot-forming process using tailored laminate temperature is introduced. By using process simulation and manufacturing experiments, improved laminate quality is achieved compared to the standard hot-forming process. Furthermore, it is also shown that the manufacturing time in the clean room can be reduced to one tenth of the standard process time. In this study 8.4 mm thick quasi-isotropic laminates from unidirectional prepreg were laid up flat with an automatic tape laying machine and hot-formed to a U-shaped laminate. The laminates were then cured in a concave mould with standard bag on the inside. A complete tailored temperature hot-forming cycle of 7.5 min produced a very good final laminate quality with a total thickness variation as low as 4.0% and without wrinkles or indications of porosity. With a 4 min hot-forming cycle the thickness variation was also acceptable at 8%.

A method of and a device for actively reducing the level of a primary field of sound or vibration in a space

Abstract: The invention concerns a method and a device for actively reducing the level of a primary field of sound or vibration in a space (2). Control sensors (7) sense a parameter related to said level. Actuators (6) produce a secondary field of sound or vibration interfering with said primary field. A first transfer function matrix defines for each control sensor the level of the parameter caused by the actuator excitation. Monitor sensors (16) sense said parameter related to the level of the primary field. A second transfer matrix defines for each monitor sensor (16) the level caused by actuator excitation. A control unit (10) controls the actuators (6) by the relation between the first transfer matrix and the second transfer matrix, the control sensors (7) and the monitor sensors (16), and a residual vector of the actual level of the control sensors.

Cyber-Threat Intelligence Architecture for Smart-Grid Critical Infrastructures Protection

Abstract: Critical infrastructures (CIs) are becoming increasingly sophisticated with embedded cyber-physical systems (CPSs) that provide managerial automation and autonomic controls. Yet these advances expo ...