COST Action IC0603 workshop "Antenna Systems & Sensors for Information Society Technologies" Limassol, Cyprus April 9 - 11, 2008 Standardization of antenna measurement techniques and benchmarking of antenna measurement facilities within the Antenna Centre of Excellence S. Pivnenko and O. Breinbjerg Department of Electrical Engineering Technical University of Denmark DK-2800 Kgs. Lyngby Denmark sp@oersted.dtu.dk Electro Science section Department of Electrical Engineering 12-04-2008 Side 1
ACE Activity 1.2 ”Antenna Measurement Techniques” • WP 1.2-1 Antenna Measurement Services • WP 1.2-2 Standardization of Antenna Measurement Techniques • WP 1.2-3 Validation and Benchmarking of Antenna Measurement Facilities • WP 1.2-4 Measurement Techniques for New Antenna Technologies Deliverables � A1.2D1 Antenna Measurement Services � A1.2D2 Recommendations on measurement techniques � A1.2D3 Validation and benchmarking results � A1.2D4 New measurement techniques www.antennasvce.org Electro Science section Department of Electrical Engineering 12-04-2008 Side 2
Deliverable A1.2D2 Abstract This report details a complete analysis of the uncertainty component estimates for Spherical Near Field and Far Field systems based on the collective experience of several European antenna measurement laboratories, located both at universities and companies. Electro Science section Department of Electrical Engineering 12-04-2008 Side 3
Uncertainty Budgets Electro Science section Department of Electrical Engineering 12-04-2008 Side 4
Facility Comparison Campaigns in ACE VAST12 SH800 SH2000 12 GHz 0.8-12 GHz 2-32 GHz SGHs 1.5-40 GHz Electro Science section Department of Electrical Engineering 12-04-2008 Side 5
Facility Comparison with the VAST12 (1) SAAB Space SAAB MW DTU FTRD UPC UPM Electro Science section Department of Electrical Engineering 12-04-2008 Side 6
Facility Comparison with the VAST12 (2) Mean STD co-polar -0.001 0.034 cross-polar -0.003 0.074 Electro Science section Department of Electrical Engineering 12-04-2008 Side 7
Facility Comparison with the SH800 (1) SES POWERWAVE DTU NOKIA IMST TU Delft SATIMO SUPELEC NCSRD UPM Electro Science section Department of Electrical Engineering 12-04-2008 Side 8
Facility Comparison with the SH800 (2) • Peak gain (IEEE definition) Some provide frequency sweep. • Directivity / Gain patterns 4 cuts (0º, 45º, 90º & 135º) Ludwig III Co/Cx. • Description of measurement facility (2 pages). • Mechanical and electrical set-up description. 824, 836, 849, 880, 896, 915, 925, 942, 960, 1000 • Measurement procedure. 1550, 1600, 1710, 1750, 1800, 1880, 1920, 1960, 2000 • Uncertainty budget. 2110, 2170, 2400, 2450, 2500 4000, 4500 5000, 6000 with a step of 100MHz Electro Science section Department of Electrical Engineering 12-04-2008 Side 9
Facility Comparison with the SH800 (3) Gain difference with the “weighted mean value”: Radiation patterns at 2.5GHz: SATIMO, SES, UPM and DTU Standard deviation from reference in 4 cuts in forward 60˚ cone Co-pol Cx-pol Electro Science section Department of Electrical Engineering 12-04-2008 Side 10
Facility Comparison with the SH2000 (1) SES SAAB DTU XLIM NPL Thales SATIMO IMST UPM FTR&D GTRI UPC Electro Science section Department of Electrical Engineering 12-04-2008 Side 11
Facility Comparison with the SH2000 (2) • Peak gain (IEEE definition) Some provide frequency sweep. • Directivity / Gain patterns 4 cuts (0º, 45º, 90º & 135º) Ludwig III Co/Cx. • Description of measurement facility (2 pages). • Mechanical and electrical FREQUENCY set-up description. � 10.95 • Measurement procedure. � X-, Ku-bands 11.70 � (10.95 – 14.5GHz) 12.75 • Uncertainty budget. � 14.50 � K-, Ka-bands 18.20 � (18.2 – 21.2GHz) 21.20 � (27.5 – 31.0GHz) 27.50 � 31.00 Electro Science section Department of Electrical Engineering 12-04-2008 Side 12
Facility Comparison with the SH2000 (3) Directivity patterns at 10.95 GHz, phi = 0 � Directivity patterns at 31.0 GHz, phi = 90 � Electro Science section Department of Electrical Engineering 12-04-2008 Side 13
Deliverable A1.2D3 Systems and procedures for validation and benchmarking of antenna measurement facilities: � The system for self-benchmarking of the measurement facilities has been developed. The system allows making quick check of the facility using several simple antennas. � The system for high-accuracy benchmarking of the measurement facilities has been developed. The system allows performing an accurate quantitative check of the facilities against accurate reference results of 3 available reference antennas. Comparison of all main antenna parameters is possible. � A wideband comparison campaign is being carried out in the frequency range 10-32 GHz with the wideband dual-ridge horn SH2000. The results of the campaign will serve as a basis for the reference data for this antenna to be used in the high-accuracy benchmarking. � A dedicated web-page was developed for the DTU-ESA Standard Gain Horn collection with the purpose to promote its use by the European institutions and private companies as accurate gain standards. The horns are being re-calibrated during 2007-2008 and the web-page will be updated accordingly. Electro Science section Department of Electrical Engineering 12-04-2008 Side 14
Antenna Measurement Services in ACE http://www.antennasvce.org Measurement Facilities Electro Science section Department of Electrical Engineering 12-04-2008 Side 15
High-accuracy Benchmarking Electro Science section Department of Electrical Engineering 12-04-2008 Side 16
Self Benchmarking Electro Science section Department of Electrical Engineering 12-04-2008 Side 17
Conclusions • Unified uncertainty budgets are defined and recommendations on uncertainty evaluation are documented for SNF and FF techniques • For the facility comparison campaigns the goal is to “go global” providing a service to any interested party • Accurate reference patterns of the 3 reference antennas are being defined allowing verification of the measurement facilities and their benchmarking • Several simple antennas for self-benchmarking are proposed, designed, and tested by ACE partners • A collection of calibrated Standard Gain Horns covering frequency range from 1.7-40 GHz is available at DTU for loan • Although ACE is officially terminated by January 2008 many ACE activities will continue in the frame of EurAAP Electro Science section Department of Electrical Engineering 12-04-2008 Side 18
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