Properties of Sparse Array Antennas

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.

At RUAG Space we work in teams and have close collaboration in projects. We care about the balance between work and leisure through our flexible working conditions.

We are located i Göteborg and Linköping. 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 and Austria.


RUAG Space is cooperating with Chalmers, KTH and Ericsson within CHASE, Chalmers Antenna Systems Excellence Centre. Our project is called Next Generation Array Antennas, NGAA. RUAGs main interest is in sparse array antennas for satellite applications.

The project has now come to an exciting stage, where it is time to apply the newly developed theory and simulation methods. We want to ensure that the optimizations run smoothly in the RUAG Space IT environment and that the MATLAB code works jointly with the commersial FEKO code. We also want to perform several case studies of trade-offs for the sparse array. This should be the objective of a master thesis project.

The thesis project starts with reading up on sparse arrays, trying out the software and making a plan for the work and for the report. Familiarization to the optimization code is done by running through some documented examples and some new ones. Then, several trade-off studies are to be performed.

This master thesis equals 30p for 1 student.

Important trade-offs of interest are:

  • Number of elements and controls depending on coverage
  • Total aperture size
  • Element positioning
  • Element size versus number of elements
  • Number of elements versus sidelobe level, gain loss, &c.
  • Effects of changed coverage or interbeam distance
  • Common Rx/Tx elements or separate?

The thesis work will be performed in close cooperation with Chalmers. Contact persons at Chalmers are Marianna Ivashina and Rob Maaskant at the antenna group within the Signals and Systems department.

For more information, please contact:
Johan Wettergren, +46 31 735 4034,  johan.wettergren(at)

Apply here