Saab AB

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

Tapered slot antenna

Abstract: The tapered slot antenna element according to the invention comprises a tapered slot with a narrow inner part. The tapered slot antenna element further comprises a cavity for receiving a feeding probe. An inner wall of said is provided with a layer comprising an electric conductive material, and said cavity is provided with an open end. The cavity is adapted such that a feeding probe can be inserted into the cavity through the open end. The layer comprising the electric conductive material is adapted such that the coaxial field can be build up between the feeding probe and said layer of electric conductive material. Hence, said layer can be a homogenous layer or a wire netting or the like, as long as a coaxial field can be build up between the electric conductive layer and the feeding probe.

Antenna integrated in a vehicle structure

Abstract: The invention provides an antenna arranged to operate in a frequency band with a bandwidth B and a centre frequency f c . The antenna comprises a slot integrated in a vehicle structure. The slot has a first end and a second end, The antenna also comprises a feeding arrangement with a feed line and a first connection point at a first edge of the slot and a second connection point located at a position substantially across the slot from the first connection point at a second opposite edge of the slot. The slot is arranged to be shorted at the first end and open at the second end. The impedance matching is arranged by locating the feeding arrangement to a position along the slot where antenna impedance matches the impedance of an input/output of a transceiver unit.

A control device and a method for adjusting the frame rate of a video image sequence

Abstract: The present invention relates to a control device for adjusting the video sequence image frame rate of a display, wherein the video sequence images are transmitted over a transmission channel in a real-time video system. The control device is arranged to display a first video sequence image and receive a second video sequence image. The control device is characterized in that it is further arranged to determine a phase difference between the display of the first video sequence image and the reception of the second video sequence image, and adjust the video sequence image frame rate of the display by controlling the display of the second video sequence image based on the phase difference.

Target existence probability in the distributed Kalman filter

Abstract: In this paper, the target existence probability for a single target in clutter is derived. More specifically, the paper considers target existence in the distributed Kalman filter. First, a conceptual solution is derived explicitly for a two-sensor case, and second a moment-matching approximation is performed, which enables computational tractability. The results can be generalized to arbitrary numbers of sensors.

Navigation with SAR and 3D-map aiding

Abstract: This paper presents a method for matching spotlight Synthetic Aperture Radar (SAR) images with a georeferenced 3D-map as means for navigational aid. A hypothesis of the flying platform's absolute position, velocity and direction — which later can be used to correct the inertial navigation system — is attained by image matching and optimization. A projective model with 6 DoF is used to create a simulated SAR image from a 3D map. The parameters of the projective model represents the most important of the platform's navigation state, and these are adjusted by Chamfer matching the captured SAR image to simulated ones. The performance is demonstrated on real spotlight SAR images and 3D-map, and the error is shown to be only a few pixels in average, which in our case is about 3 meters.