1. Antenna group at Chalmers
Professor Per-Simon Kildal
Adjunct Professor Jan Carlsson
PhD students
Tekn. Lic. Omid Sotoudeh… Dr in Dec 05- Sony Ericsson
Tekn. Lic. Malcolm Ng Mou Kehn….Dr in Dec 05
Tekn. Lic. Ulf Carlberg
Rikard Olsson…..Lic in Oct 05- AMC Centurion AB
External PhDs
Dr. Kent Rosengren, Flextronics Comp. Kalmar….Dr in May 05
Kristian Karlsson, SP….Lic in Sep 05
Charlie Orlenius, Bluetest AB

3. Research activities Antenna design approaches Antenna types
Electromagnetic design methods (artificial surfaces/materials)
Theory
Numerical simulations, commercial tools
Computation methods (moment method for special symmetries, Fortran & Matlab & Mathcad)
Characterization / new measurement methods for multipath
Antenna types
Reflector antennas and feeds
Small antennas
Arrays
Multifunction antennas

4. What for? Radio telescopes and ionospheric studies
Satellite communication antennas
Wireless terminals such as mobile phones
Large companies such as Ericsson
Small companies and spin-offs

5. Example of our designs: EISCAT VHF antenna (200m x 40m)

6. Example of our designs: Dual-reflector feed for radio telescope in Arecibo
300 m diameter

7. Example of our designs: Odin dual reflector system

8. Example of designs by us: Reflector antennas for radio links

9. We are involved in US SKA proposal
100 MHz to 25 GHz, reflectors (Ø43m).

10. Forerunner of US SKA (500 MHz – 10 GHz)

11. Size and complexity for fmin = 500 MHz
Chalmers feed:
No problem with phase center variations
ATA feed: Problem with phase center variations

12. Size and complexity for fmin = 500 MHz
Eleven feed:
No problem with phase center variations
ATA feed: Problem with phase center variations

13. Eleven feed for Green Bank 43m radio telescope: 150-2000 MHz

14. Model made at Saab Ericsson Space
Our activity in Forskarskolan: “Hard” horn for multibeam satellite antenna
Model made at Saab Ericsson Space
20 and 30 GHz in same antenna