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Design of slotted waveguide antennas

Do you want to be involved in developing the future technology? Space is a part of the daily work at RUAG Space.  We manufacture space products that are used in almost all satellites and rockets serving the world wide space industry and global needs.  

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We are located i G√∂teborg and Link√∂ping. RUAG Space AB is a part of the space division within RUAG Holding AG, a swiss technology group. The space division has approx. 1 100 employees in Switzerland, Sweden, Austria and Finland. 

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Background
Slotted waveguide arrays are popular within radar, communication and other high frequency applications. They typically consist of a handful of waveguides placed next to each other in one or several panels, with each waveguide being an integer number of half waveguide wavelengths long with as many slots cut in its upper wall, i.e. the panel surface. Each slot radiates a certain power and the sum of their contributions builds up the total radiated field. As such, slotted waveguide antennas are relatively simple and inexpensive to fabricate and can be constructed with low aerodynamic profile, making them ideal for e.g. aviation and space applications. They also have low loss and radiate linear polarization with low cross polarization.

Work in the field of
The project consists of developing a MATLAB code for synthesis of slotted waveguide antennas. The algorithm should be able to determine the individual slot geometries and positions needed in order for the antenna radiation to generate a desired far field pattern. As slotted waveguide antennas typically comprise a large number of slots, the task at hand becomes a multi-dimensional optimization problem that can be addressed via a number of methods. A complicating factor is that radiating waveguide slots may couple strongly, or not all, depending on their geometries, positions and the panel surface structure, so the optimization procedure needs to be iterative in nature for the mutual slot-slot coupling effects to be correctly accounted for.

Qualifications
Understanding of electromagnetic fields is necessary. We are looking for Master students with a profile including antennas, microwave technology or electromagnetic computations.

Thesis work extent
The master thesis project is for one student and comprises 20 weeks, 30 credits.

For more information, please contact:
Johan Wettergren, Manager Antenna Electrical Design 031-7354034, johan.wettergren(at)ruag.com