workshop national graduate school for space technology, 2005-09-13 antenna group at chalmers...
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Workshop national graduate school for space technology, 2005-09-13
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
Workshop national graduate school for space technology, 2005-09-13
Workshop national graduate school for space technology, 2005-09-13
Research activities• Antenna design approaches
– 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
Workshop national graduate school for space technology, 2005-09-13
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
Workshop national graduate school for space technology, 2005-09-13
Example of our designs: EISCAT VHF antenna (200m x 40m)
Workshop national graduate school for space technology, 2005-09-13
Example of our designs: Dual-reflector feed for radio telescope in Arecibo
300 m diameter
Workshop national graduate school for space technology, 2005-09-13
Example of our designs: Odin dual reflector system
Workshop national graduate school for space technology, 2005-09-13
Example of designs by us: Reflector antennas for radio links
Workshop national graduate school for space technology, 2005-09-13
We are involved in US SKA proposal
100 MHz to 25 GHz, 5000 reflectors (Ø43m).
Workshop national graduate school for space technology, 2005-09-13
Forerunner of US SKA (500 MHz – 10 GHz)
Workshop national graduate school for space technology, 2005-09-13
Size and complexity for fmin = 500 MHz
ATA feed:
Problem with phase center
variations
Chalmers feed:No
problem with phase center
variations
Workshop national graduate school for space technology, 2005-09-13
Size and complexity for fmin = 500 MHz
ATA feed:
Problem with phase center
variations
Eleven feed:No
problem with phase center
variations
Workshop national graduate school for space technology, 2005-09-13
Eleven feed for Green Bank 43m radio telescope: 150-2000 MHz
Workshop national graduate school for space technology, 2005-09-13
Our activity in Forskarskolan:“Hard” horn for multibeam satellite antenna
Model made at
Saab Ericsson
Space
20 and 30 GHz in same
antenna