Standardization of antenna measurement techniques and benchmarking - - PowerPoint PPT Presentation

12-04-2008 Side 1

Electro Science section Department of Electrical Engineering

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 COST Action IC0603 workshop "Antenna Systems & Sensors for Information Society Technologies" Limassol, Cyprus April 9 - 11, 2008

12-04-2008 Side 2

Electro Science section Department of Electrical Engineering

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

12-04-2008 Side 3

Electro Science section Department of Electrical Engineering

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.

12-04-2008 Side 4

Electro Science section Department of Electrical Engineering

Uncertainty Budgets

12-04-2008 Side 5

Electro Science section Department of Electrical Engineering

Facility Comparison Campaigns in ACE

VAST12 12 GHz SH2000 2-32 GHz SH800 0.8-12 GHz SGHs 1.5-40 GHz

12-04-2008 Side 6

Electro Science section Department of Electrical Engineering

Facility Comparison with the VAST12 (1)

DTU SAAB Space UPC UPM SAAB MW FTRD

12-04-2008 Side 7

Electro Science section Department of Electrical Engineering

Facility Comparison with the VAST12 (2)

Mean STD co-polar

• 0.001

0.034 cross-polar

• 0.003

0.074

12-04-2008 Side 8

Electro Science section Department of Electrical Engineering

Facility Comparison with the SH800 (1)

DTU SES SATIMO IMST UPM NCSRD POWERWAVE NOKIA SUPELEC TU Delft

12-04-2008 Side 9

Electro Science section Department of Electrical Engineering

Facility Comparison with the SH800 (2)

824, 836, 849, 880, 896, 915, 925, 942, 960, 1000 1550, 1600, 1710, 1750, 1800, 1880, 1920, 1960, 2000 2110, 2170, 2400, 2450, 2500 4000, 4500 5000, 6000 with a step of 100MHz

• 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.

• Measurement procedure.
• Uncertainty budget.

12-04-2008 Side 10

Electro Science section Department of Electrical Engineering

Facility Comparison with the SH800 (3)

Gain difference with the “weighted mean value”: Co-pol Standard deviation from reference in 4 cuts in forward 60˚ cone Cx-pol Radiation patterns at 2.5GHz: SATIMO, SES, UPM and DTU

12-04-2008 Side 11

Electro Science section Department of Electrical Engineering

Facility Comparison with the SH2000 (1)

DTU SES SATIMO IMST UPC UPM NPL SAAB FTR&D XLIM Thales GTRI

12-04-2008 Side 12

Electro Science section Department of Electrical Engineering

Facility Comparison with the SH2000 (2)

FREQUENCY X-, Ku-bands (10.95 – 14.5GHz)

• 10.95
• 11.70
• 12.75
• 14.50

K-, Ka-bands (18.2 – 21.2GHz) (27.5 – 31.0GHz)

• 18.20
• 21.20
• 27.50
• 31.00
• 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.

• Measurement procedure.
• Uncertainty budget.

12-04-2008 Side 13

Electro Science section Department of Electrical Engineering

Facility Comparison with the SH2000 (3)

Directivity patterns at 10.95 GHz, phi = 0 Directivity patterns at 31.0 GHz, phi = 90

12-04-2008 Side 14

Electro Science section Department of Electrical Engineering

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.

12-04-2008 Side 15

Electro Science section Department of Electrical Engineering

Antenna Measurement Services in ACE

http://www.antennasvce.org Measurement Facilities

12-04-2008 Side 16

Electro Science section Department of Electrical Engineering

High-accuracy Benchmarking

12-04-2008 Side 17

Electro Science section Department of Electrical Engineering

Self Benchmarking

12-04-2008 Side 18

Electro Science section Department of Electrical Engineering

Conclusions

• Unified uncertainty budgets are defined and recommendations
• n 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