1. CReSIS Electromagnetic Anechoic Chamber at the University of Kansas
Contact person: Stephen Yan
Reservation at
Room G547
M2SEC building
1536 W 15th Street
Lawrence, KS 66045
Last updated: 11/7/2018

2. Electromagnetic Anechoic Chamber
Provides an electromagnetically quiet environment for measuring the radiating properties of a device-under-test
Enclosed by an external metallic shielding to provide isolation from the outside environment
Interior lied with radio frequency/microwave absorbers and ferrite tiles to minimize unwanted multiple internal signal reflections inside the chamber
To emulate a “free space” environment for testing
Application examples:
Characterization of intentional radiators or the scattering of electromagnetic energy, such as antenna radiation pattern and radar cross section (RCS) measurements
Determining the level of radiation/noise from unintentional radiators. For instance, electromagnetic interference (EMI) measurement for digital devices/systems
Determining the level of immunity of an electronic device/system when exposed to ambient electromagnetic signal/noise

3. Electromagnetic Anechoic Chamber at KU
Features
Electromagnetic measurement and characterization from 30 MHz to 18 GHz
10 m measurement range
Biggest chamber within ~500 miles in the area
Capable of accommodating small UAV of up to 1,100 lbs
~100 dB shielding from external environment
Potential Applications:
Antenna performance characterization
EMI/EMC measurement
Radar cross section study
Others…
Screenshot from CCTV installed inside the chamber

4. Data acquisition system and device controller
Chamber Floor Plan
11.6 m
7.3 m
2.4 m x 2.4 m
Double leaf door
1.2 m x 2.1 m
Single leaf door
Turntable
Reference RX antenna
AUT
(TX antenna)
Connector Panel
Walkway
Absorbers
Data acquisition system and device controller

5. Chamber Specifications
Chamber Dimensions
11.58 m x 7.29 m 7.36 m (interior, with 0.4 m raised floor)
Wall Shielding
Magnetic field: 20 1 kHz, kHz, kHz
Electric field: 100 dB from 200 kHz to 50 MHz
Plane wave: 100 dB from 50 MHz to 1 GHz
Microwave: GHz
Door Shielding
Magnetic field: 20 1 kHz, kHz, kHz
Electric field: 90 1 kHz, 120 dB from 10 kHz to 50 MHz
Plane wave: 120 dB from 50 MHz to 10 GHz
Microwave: 100 dB from 10 GHz to 26 GHz, GHz
Absorber
Power handling: 775 W/m2
Attenuation: >10 dB from 30 MHz to 18 GHz
Normal incidence

6. Chamber Specifications
Ferrite Tiles
Handle up to 200 V/m of continuous RF field
Site-VSWR
Quiet zone test volume: 1.5 m
Test frequency range: 1 GHz – 18 GHz
Measured performance: 3.37 dB
Satisfied CISPR performance requirement ≤ 6 dB
Field Uniformity
Test plane: 1.5 m x 1.5 m
Test frequency range: 80 MHz to 1 GHz
Field level evaluated: 5.4 V/m
Measured performance: < 4.2 dB
Satisfied IEC standard ≤ 6 dB
Free-space Normalized Site Attenuation
Test range: 3 m
Test diameter volume: 1.5 m
Measured performance: ± 3.9 dB deviation from theoretical value specified in CISPR (Ed.3)
CTIA Ripple Testing
Eligible for CTIA Authorized Testing Laboratory (CATL) filing
Test data available upon request
Connector Panel
3 N-type connectors
6 FSMA penetration kit
6 FC-type optical connectors
2 K-type connectors
2 ST penetration kit

7. List of Equipment/Tool
Hardware
Agilent N5230C PNA-L 4-port Network Analyzer (10 MHz – 20 GHz)
Agilent 8052D calibration kit
Agilent E4446A PSA Spectrum Analyzer (3 Hz – 44 GHz)
ETS-Lindgren Standard Antennas (see next slides)
ETS-Lindgren 7-TR/POL Antenna Tower (max. load: 13.5 kg)
ETS-Lindgren 2090 Dual-Device Controller
ETS-Lindgren 4340 Shielded Camera System
Bosch DLK Digital Distance Measurer
Skil MT 8201 Self-Leveling Cross Line Laser
Assorted RF cables and connectors/adaptors
Software
Ansys HFSS v14
Agilent ADS
CST Microwave Studio
MATLAB 2011b

8. Available Standard Antennas#
Designated frequency
Start Stop
Measurement frequency 30
MHz
100
300 1
GHz 3 6 18
ETS-Lindgren
Mini-Bicon* (cage) 3180B
30 MHz
1 GHz
Mini-Bicon* (conical) 3180B
3 GHz
End-Fed Mini-Bicon 3183
18 GHz
BiConiLog 3142C (x2)
26 MHz
Log-Periodic Dipole Array 3148
200 MHz
2 GHz
Dual-Pol. Log-Periodic 3145BDP
100 MHz
1.1 GHz
Double-Ridged Horn 3117
Quad-Ridged Horn
300 MHz
6 GHz
Quad-Ridged Horn
Pasternack
WR159 Horn PE9860/NF-15
4.9 GHz
7.05 GHz
WR187 Horn PE9861/NF-15
3.95 GHz
5.86 GHz
Narda
WR187 Horn 643
5.85 GHz
WR430 Horn 645
1.7 GHz
2.6 GHz
Scientific Atlanta
WR137 Horn
8.2 GHz
WR187 Horn
3.9 GHz
WR650 Horn
1.12 GHz
Quad-Ridged Horn
Dual-Pol. Log-Periodic
Mini-Bicon
# Other antennas may be available; please contact Stephen Yan at ^ Data sheet available upon request * Single antenna with two configurations

9. Reservation and More Information
Reservation is REQUIRED for all users (including CReSIS personnel)
Schedule can be found at
Please for more information and to make reservations
Intended external users are advised to contact Stephen Yan at before making reservations
For rates, policy manual, laboratory safety manual, and chamber user’s guide, please visit:
Chamber location:
Room G547, M2SEC building
1536 W 15th Street
Lawrence, KS 66045