Anechoic
chambers
Controlled Electromagnetic Environments
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Anechoic chambers . . . . . . . . . . 03
Semi anechoic chambers (EMC) . . . 03
3m semi anechoic chamber . . . . . 05
5m semi anechoic chamber . . . . . 06
10m semi anechoic chamber . . . . . 07
Compact anechoic chamber . . . . . 08
Full anechoic chamber . . . . . . . . 09
Anechoic chamber for automotive
testing (components) . . . . . . . . . 10
Anechoic chamber for automotive
testing (full vehicle) . . . . . . . . . 11
Anechoic chamber for
Mil-Std / Tempest testing . . . . . . 12
Antenna pattern measurement
rooms / Antenna test ranges . . . . . 14
Controlled
Electromagnetic
Environments
Comtest Engineering supplies high performance
RF shielded rooms, reverberation and anechoic
chambers. The company is located in The
Netherlands and was founded in 1985.
We are a professional organization and recognized for our
quality and flexibility. Comtest high performance RF shielded
doors, mode-stirrer systems and microwave absorbers have been
internationally recognized as state of the art products.
Our skilled and experienced team is dedicated to satisfy your need
to control the electromagnetic environment!
Comtest Engineering b.v.
Industrieweg 12
2382 NV Zoeterwoude
The Netherlands
Phone: +31 (0)71 5417 531
E-mail: info@comtest.eu
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ISO
9001
Anechoic chambers
An anechoic chamber is a RF shielded room whose
Comtest Engineering can design and supply the
walls and ceiling have been covered with microwave
following (standard) anechoic chamber solutions:
absorbers that scatter or absorb so much of the incident
energy that it can simulate free space. The anechoic
•
Compact (semi / full) anechoic chamber
chamber is typically used to house the equipment for
•
Semi anechoic chamber, test distance: 3m, 5m, 10m
performing measurements of antenna radiation patterns,
•
Anechoic chamber for automotive testing
electromagnetic compatibility (EMC) and radar cross
section (RCS) measurements. Testing can be conducted
on various electronic devices, vehicles, aircraft, or
spacecraft. Semi anechoic chamber constructions are
(components / full vehicle)
•
Anechoic chamber for MIL-STD / Tempest testing
•
Antenna pattern measurement room
•
(compact) Antenna test range
designed for radiated emission and immunity testing.
Microwave or antenna test chambers are designed to
perform measurements of antenna characteristics.
Semi anechoic chambers
The main purpose of a semi anechoic chamber is to
(EMC)
Typical performance of a semi anechoic chamber:
perform measurements of radio frequency emission
or immunity from electronic products at 3,5 or 10mtr
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NSA: +/- 4 dB
measurement range length. The combination of the pan-
•
FU: 75% of 16 points comply with +6 dB
type 2mm galvanized panel system and the polystyrene
hybrid absorber solution on the walls and ceiling
requirements
•
sVSWR: below 6 dB
eliminates unwanted electrical noise and complies with
international emission and immunity test standards.
Options for a (semi) anechoic chamber:
The semi anechoic chamber is a multi functional
test environment for commercial, military, R&D and
•
automotive testing.
An additional RF shielded room can be installed to
house high power RF amplifiers (amplifier room) or
control and test equipment (control room).
Features of a typical semi anechoic chamber:
•
•
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Video and audio monitoring system
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Various fibre optic converter systems for USB and
Ethernet.
Full compliance emission test site for frequency
range of 30MHz to 18GHz as per CISPR 16-1-4
•
EUT test table
Full compliance immunity test site for frequency
•
Various special positioning equipment
range of 80MHz to 6GHz as per IEC/EN 61000-4-3
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Shielding effectiveness according to EN 50147-1
up to 40GHz
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Applicable standards / test methods for
semi anechoic chambers:
Radiated emissions
Radiated immunity
EN 61000-6-3
IEC/EN 61000-4-3
EN 61000-6-4
EN 61000-6-1
CISPR 11 / EN55011
EN 61000-6-2
CISPR 12 / EN55012
EN 55020
CISPR 13 / EN55013
EN 55024
CISPR 14 / EN55014
Mil-Std 461-F (RS section)
CISPR 15 / EN55015
DO-160-G
CISPR 16-1-14
CISPR 22 / EN55022
FCC part 15
CISPR 25
Mil-Std 461-F (re section)
DO-160-G
Various ETSI standards
ANCI C63.4
Anechoic chamber for automotive components testing
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3m semi anechoic chamber
model 1711-000
The main purpose of a 3m anechoic chamber is to perform full compliance measurements of radio frequency
emission and immunity from electronic products at 3mtr measurement range length.
Typical specifications:
Dimensions:
8.55 x 5.55 x 5.775 (h) m
Shielding construction:
2mm hot galvanized shielding panels with a free standing structural steel support.
Absorbers:
Hybrid solution of ferrite tiles and polystyrene hybrid absorber (model HT45) on walls and ceiling
Ventilation:
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Personnel Door:
RF shielded swing door model 1766-1221 (1200*2100mm)
Wall entry panel:
Model 1795-1530 (150x300mm) including RF connectors
EUT power line:
Filtered 230VAC / 32A / single phase model 4801-032
Lighting:
CDMT lights 70Watt model 1840-070
Frequency range:
30MHz to 18Ghz for radiated emission and 80MHz-6GHz for radiated immunity.
Test distance:
3m between centre of antenna and EUT
Test volume:
2 mtr
Floor:
Raised ground plane with floor entry panels incl. RF connectors
Turn table:
Fibre optic controlled turn table 2mtr
Antenna mast:
Fibre optic controlled antenna mast
In addition to the typical specification of the 3m semi anechoic chamber we are able to tailor the chamber’s
specification to satisfy our customers’ individual requirements.
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5m semi anechoic chamber
model 1712-000
The main purpose of a 5m anechoic chamber is to perform full compliance measurements of radio frequency
emission and immunity from electronic products at 5mtr measurement range length.
Typical specifications:
Dimensions
11,40 x 6.60 x 5.775 (h) m
Shielding construction:
2mm hot galvanized shielding panels with a free standing structural steel support.
Absorbers:
Hybrid solution of ferrite tiles and polystyrene hybrid absorber (model HT45) on walls and ceiling
Ventilation:
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Personnel Door:
RF shielded sliding door model 1752-1523 (1500*2300mm)
Wall entry panel:
Model 1795-1530 (150x300mm) including RF connectors
EUT power line:
Filtered 230VAC / 32A / single phase model 4801-032
Lighting:
CDMT lights 70Watt model 1840-070
Frequency range:
30MHz to 18Ghz for radiated emission and 80MHz-6GHz for radiated immunity.
Test distance:
5m and 3m between centre of antenna and EUT
Test volume:
3 mtr
Floor:
Raised ground plane with floor entry panels incl. RF connectors
Turn table:
Fibre optic controlled turn table 3mtr
Antenna mast:
Fibre optic controlled antenna mast
In addition to the typical specification of the 5mtr semi anechoic chamber we are able to tailor the chamber’s
specification to satisfy our customers’ individual requirements.
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10m semi anechoic chamber
model 1713-000
The main purpose of a 10m anechoic chamber is to perform full compliance measurements of radio frequency
emission and immunity from electronic products at 10 and/or 3mtr measurement range length.
Typical specifications:
Dimensions:
19.20 x 11.40 x 7,80 (h) m
Shielding construction:
2mm hot galvanized shielding panels with a free standing structural steel support.
Absorbers:
Hybrid solution of ferrite tiles and polystyrene hybrid absorber (model HT45) on walls and ceiling
Ventilation:
Honeycomb model 1791-6060 (600 x 600mm / 18GHz)
Personnel Door:
RF shielded swing door model 1766-0921 (900*2100mm)
EUT door:
RF shielded sliding door model 1755-3030 (3000*3000mm) incl. lift platform.
Wall entry panel:
Model 1795-3060 (300x600mm) including RF connectors
EUT power line:
Filtered 400VAC / 32A / three phase model 4803-032
Lighting:
CDMT lights 150 W model 1830-150
Frequency range:
30MHz to 18Ghz for radiated emission and 80MHz-6GHz for radiated immunity.
Test distance
10m and 3m between centre of antenna and EUT
Test volume
4 mtr, single axis
Floor
Raised ground plane with floor entry panels incl. RF connectors.
Turn table:
Fibre optic controlled turn table 4mtr
Antenna mast:
Fibre optic controlled antenna mast
In addition to the typical specification of the 10mtr semi anechoic chamber we are able to tailor the chamber’s
specification to satisfy our customers’ individual requirements.
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Compact anechoic chamber
model 1710-100
Features:
A compact anechoic chamber can be used for radiated
immunity test evaluations at 1m distance. For
products fitting into a square of 0,5 x 0,5m, these test
•
are in compliance with the EN61000-4-3 standard.
Full compliance immunity test site for small
equipment at 1m distance
Additionally pre-compliance emission testing can be
•
Pre-compliance emission measurements at 1m distance
executed in a repeatable environment.
•
Ferrite coverage on floor, walls and ceiling
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Quick scan emission measurements without
Typical performance:
antenna height scan at 1m distance
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Field Uniformity (FU): 4 of 4 points comply with
Partial hybrid absorber coverage at walls and ceiling
+6dB requirements
Typical specifications:
Dimensions:
4.050 x 3.600 x 2.929 (h)m.
Shielding construction:
2mm hot galvanized shielding panels with a structural steel support on the roof panels
Absorbers:
Hybrid solution of ferrite tiles on floor, walls and ceiling and polystyrene hybrid absorber (HT45) on walls and
ceiling plus a set of floor absorbers
Ventilation:
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Door:
RF shielded swing door model 1766-0921 (900*2100mm)
Wall entry panel:
Model 1795-3030 (300x300mm) including RF connectors
EUT power line:
Filtered 230VAC / 32A / single phase model 4801-032
Lighting:
CDMT lights 70 W model 1840-070
Frequency range:
Radiated immunity testing from 80MHz- 6GHz / pre compliance emissions 30MHz – 18GHz
Test distance
1 m between centre of antenna and EUT
Field Uniformity
0,5 x 0,5 meter
Floor:
Ferrite tiles and anti static carpet tiles
In addition to the typical specification of the compact anechoic chamber we are able to tailor the chamber’s
typical specification to satisfy our customers’ individual requirements.
Options:
•
Free standing turn table 1,2 mtr to perform
pre-compliance emissions test
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Antenna stand with fixed height and automatic
polarization change
•
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Increase test distance to 2 or 3 mtr
Full anechoic chamber model
1710-000
A full anechoic chamber can be used for radiated
emission test evaluations of electronics products and
especially telecom equipment.
Typical performance:
CISPR 16-1-4 (2010) + annex A1 (2012): (free space)
NSA: +/- 6 dB / VSWR: below 6dB
ETSI TR 102 273-2 V1.2.1
Typical specifications:
Dimensions
7.500 x 4.050 x 2.925 (h)m.
Shielding construction
2mm hot galvanized shielding panels with a structural steel support on the roof panels
Absorbers
Hybrid solution of ferrite tiles and polystyrene hybrid absorber (model HT45) on walls, floor and ceiling
Ventilation
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Door
RF shielded swing door model 1766-0921 (900*2100mm)
Wall entry panel
Model 1795-3030 (300x300mm) including RF connectors
EUT power line
Filtered 230VAC / 16A / single phase model 4801-016
Lighting
CDMT light 70 W model 1840-070
Frequency range
30MHz-18Ghz
Test volume
1.2 mtr
Floor
Full anechoic (ferrites and absorbers) incl. a walk way solution
Turn table
Free standing turn table 1,2 mtr
Antenna mast
Fibre optic controlled antenna mast
In addition to the typical specification of the full anechoic chamber we are able to tailor the chamber’s typical
specification to satisfy our customers’ individual requirements.
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Anechoic chamber for automotive
testing (components) model 1714-000
The main purpose of an anechoic chamber for
components. The combination of the pan-type 2mm
automotive testing is to perform measurements of radio
galvanized panel system and the polystyrene hybrid
frequency emission or immunity specialized for vehicle
absorbers on the walls and ceiling eliminates unwanted
on board equipment testing. Testing at component
electrical noise and complies with international
level verifies levels of emissions from individual car
emission standards for automotive testing.
Features:
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Noise floor level as per CISPR 25 requirements
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Grounded EUT test table as per CISPR 25 design guide lines
Applicable standards / test methods:
Emissions
Immunity
CISPR 12 / EN55012
ISO 11452
CISPR 25
SAE J1113 part 21
Automotive directive 95/54/EC
In addition to the above standards Comtest can design automotive test chambers according to specific guidelines
of individual car manufacturers.
Typical performance:
•
Absorber return loss of 6dB minimum between 70MHz and 6GHz
Typical specifications:
Dimensions:
6.300 x 5.400 x 3.825 (h) m
Construction:
2mm hot galvanized shielding panels with a structural steel support on the roof panels
Absorbers:
Ferrites and polystyrene hybrid absorber solution (model HT25) or model MT65 absorbers on walls and ceiling
Ventilation:
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Personnel Door:
RF shielded swing door model 1766-1221 (1200*2100mm)
Wall entry panel:
Model 1795-3030 (300x300mm) including RF connectors
EUT power line:
Filtered 230VAC / 32A / single phase model 4801-032
Lighting:
CDMT lights 70 W model 1840-070
Frequency range:
70MHz – 2.5GHz
Floor:
Conductive metal ground plane
Table support:
RF-grounding connections to the shield wall or floor for test table connection
In addition to the typical specification of the semi anechoic chamber for automotive testing we are able to tailor
the chamber’s specification to satisfy our customers’ individual requirements.
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Anechoic chamber for automotive
testing (full vehicle) model 1714-100
The main purpose of an anechoic chamber for full
components on on-board receivers. The combination
vehicle automotive testing is to perform measurements
of the pan-type 2mm galvanized panel system and the
of radio frequency emission or immunity specialized
polystyrene hybrid absorbers on the walls and ceiling
for full vehicle testing. Testing at full vehicle level
eliminates unwanted electrical noise and complies with
verifies effects of emissions from car-mounted
international emission standards for automotive testing.
Features:
•
Noise floor level as per CISPR 25 requirements
Applicable standards / test methods:
Emissions
Immunity
CISPR 12 / EN55012
ISO 11451-2
CISPR 25
ISO 11451-3
Automotive directive 95/54/EC
SAEJ551 part 11&12
SAEJ551 part 11&12
In addition to the above standards Comtest can design automotive test chambers according to specific guidelines
of individual car manufacturers.
Typical performance:
•
Absorber return loss of 6dB minimum between 70MHz and 6GHz
Typical specifications:
Dimensions:
12,00 x 7,50 m x 3.925 (h) m
Construction:
2mm hot galvanized shielding panels with a structural steel support on the roof panels
Absorbers:
Ferrites and polystyrene hybrid absorber solution (model HT25) or model MT65 absorbers on walls and ceiling
Ventilation:
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Special gas-exhaust for engine fumes
EUT door:
RF shielded sliding door model 1754-2424 (2400*2400mm)
Wall entry panel:
Model 1795-3030 (300x300mm) including RF connectors
EUT power line:
Filtered 400VAC / 63A / three phase model 4803-063
Lighting:
CDMT lights 70 W model 1840-070
Frequency range:
70MHz – 2.5GHz
Floor:
Conductive metal ground plane (heavy load)
In addition to the typical specification of the anechoic chamber for full vehicle testing we are able to tailor the
chamber’s specification to satisfy our customers’ individual requirements.
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Anechoic chamber for Mil-Std /
Tempest testing model 1715-000
This type of test chamber is designed for testing against
and wideband antennas as well as LISN instrumentation
international test procedures such as MIL-STD 461, DO-
for conducted testing procedures can be provided as a
160 and Tempest SDIP. Measurement instrumentation
turnkey solution.
such as Tempest receiver systems, MIL-STD test tables
Features:
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Absorber layout in accordance to MIL-STD 461 / DO-160
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Absorber return loss compliant with MIL-STD 461 / DO160 requirements
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Both suitable for radiated and conducted testing
Applicable standards / test methods:
Typical performance:
•
•
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MIL-STD 461E/F
Absorber return loss of 6dB minimum between 80
MHz to 250MHz
• RE-101
•
Absorber return loss of 10dB minimum from
• RE-103
• RE-105
• RS-101
• RS-103
A MIL-STD test chamber is designed in full compliance
• RS-105
to the MIL-STD 461 standard set-up including a test
250MHz up.
•
DO-160
table and inner clearances regarding the absorbers and
•
Tempest SDIP
the test table.
Typical specifications:
Dimensions:
6.000 x 5.250 x 2.925 (h) m
Construction:
2mm hot galvanized shielding panels with a structural steel support on the roof panels
Absorbers:
Polystyrene absorber solution (model MT65) partly lined to walls and ceiling.
Ventilation:
Honeycomb model 1791-3030 (300 x 300mm / 18GHz)
Personnel Door:
RF shielded swing door model 1766-1221 (1200*2100mm)
Wall entry panel:
Model 1795-3030( 300x300mm) including RF connectors
EUT power line:
Filtered 240VAC / 16A / single phase model 4801-016
Lighting:
CDMT lights 70 W model 1840-070
Floor:
Conductive metal ground plane
Table support:
RF-grounding connections to the shield wall for test table cover connection
In addition to the typical specification of a MIL STD test chamber we are able to tailor the chamber’s specification to
satisfy our customers’ individual requirements.
Options:
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MIL- STD test-table incl. conductive brass cover (model 1410-000) and sufficient connection strips.
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Antenna pattern measurement
rooms / Antenna test ranges
The main purpose of a microwave full anechoic
Comtest Engineering can design and supply the
chamber is to perform measurements on antenna
following microwave full anechoic chamber solutions:
pattern characteristics or radar systems. The
combination of the pan-type 2mm galvanized panel
•
Antenna Pattern Measurement chamber
system and the polystyrene absorber solution on
•
(compact) Antenna Test Range
the walls, floor and ceiling eliminates unwanted
•
Radar Cross Section chamber
electrical noise and creates a controlled RF test
environment.
Microwave anechoic chambers, differently from
EMC chambers, don’t follow a standard approach.
Each antenna chamber is a tailored to the specific
requirements of the customer.
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Please also view our other literature or visit our website:
www.comtest.eu
Hybrid &
Microwave
Absorbers
Reverberation
chambers
Controlled Electromagnetic Environments
RF Shielded
doors
Controlled Electromagnetic Environments
1
RF Shielded
rooms
Controlled Electromagnetic Environments
1
1
Reverberation,
Anechoic chamber
and RF shielded
room accessories
Controlled Electromagnetic Environments
Controlled Electromagnetic Environments
1
1
15
www.comtest.eu
Comtest Engineering b.v.
Industrieweg 12
2382 NV Zoeterwoude
The Netherlands
Phone: +31 (0)71 5417 531
E-mail: info@comtest.eu
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