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.

Coordination of Electronic Counter Measures

Abstract: An electronic counter measures solution. Jamming signals are emitted towards a threat to improve chances of survival for at least two vehicles, which are physically separated from one another, however associated with one another in a group. Each of the at least two vehicles receives a wireless time reference signal from an external resource. The vehicles exchange messages over a wireless data link. The messages pertain to usage of at least one electronic warfare resource in each vehicle. Based on the messages and the time reference signal the usage of at least one first electronic warfare resource in a first vehicle is coordinated with the usage of at least one second electronic warfare resource in a second vehicle, such that a particular type of jamming signal is emitted alternately either from the at least one first resource or from the at least one second resource, essentially without any overlaps or gaps in time. Thereby, a false target is created between the vehicles with respect to a weapon which operates in a so-called Home-on-Jam mode.

A Joint Statistical and Symbolic Anomaly Detection System: Increasing performance in maritime surveillance

Abstract: The need for improving the capability to detect illegal or hazardous activities and yet reducing the workload of operators involved in various surveillance tasks calls for research on more capable automatic tools. To maximize their performance, these tools should be able to combine automatic capturing of normal behavior from data with domain knowledge in the form of human descriptions. In a proposed Joint Statistical and Symbolic Anomaly Detection System, statistical and symbolic methods are tightly integrated in order to detect the majority of critical events in the situation while minimizing unwanted alerts. We exemplify the proposed system in the domain of maritime surveillance.

High performance GaN front-end MMICs

Abstract: Key GaN HEMT front-end circuits for next generation AESA radar/EW applications are presented. The circuits are an S-band 20 W MMIC HPA reaching 50 % measured PAE, a two-stage S-band MMIC LNA showing a measured NF of 1.3 dB, and a DC-18 GHz SPDTs showing a measured insertion loss of less than 2 dB at 18 GHz. Furthermore, a 2–18 GHz front-end circuit with a co-integrated two-stage LNA and a T/R-switch has been designed as an example of an integrated multi-functional GaN front-end circuit. The circuits were manufactured in the Chalmers AlGaN HEMT on SiC MMIC process. The process includes both 0.25 μm and 0.15 μm gate-length devices.

Introducing MBSE By using Systems Engineering Principles

Abstract: This paper describes one possible way how to introduce MBSE into an organization. It is based on a real example from a development organisation in aerospace industry. In this example the start of the introduction of MBSE had an innovative enthusiasm, thereafter followed by stagnation of progress. A change in point-of-view on why MBSE should be used was made and as a consequence the entire work methodology was considered a Development Enabling system. At this point Systems Engineering principles were applied in order to determine the need and to find a solution. A description of pitfalls and other lessons are included but it will not cover application of SysML or any architectural frameworks. One point in this paper is that introducing MBSE is not a technical task, it is a change process affecting a very complex system where the most important system elements are humans.