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Compact Anechoic Chamber

Panashield Compact Anechoic Chambers are available in various sizes for 3 metre electromagnetic compatibility testing. The range starts with a small chamber for both pre- compliant /pre scan radiated immunity (RI) testing and radiated emissions (RE) testing and sizes increase to larger chambers for full compliant radiated immunity testing and pre compliant radiated emissions testing. The CAC is economical in both cost and the floor space it requires.

The chambers are constructed using the Panabolt modular panel RF shielding system. Absorber lining may be a combination of either pyramidal and ferrite absorber, ferrite absorber only or ferrite and hybrid absorber to extend the frequency range to at least 18 GHz.

Typical models are detailed below but different chambers sizes can be accommodated to suit the clients test object size, available floor area and floor to ceiling height.

Panashield Compact Chamber

One of the largest EMC compact anechoic chambers constructed (pictured above), nominal size 7.2 m x 4.8 m x 3.6 m high, lined with ferrite panels and the Panashield non-flammable HYB-NF-12 hybrid absorber achieved a site attenuation of better than +/- 3.5 dB from 30 MHz to 18 GHz. Receive antenna limited to a scan height of 2.2 m due to height of chamber.

When used for emissions testing, these compact anechoic chambers are designed for testing over a reflective ground plane floor and measurements correlated to an open area test site. Fully anechoic chambers where the floor is also covered with absorber materials are available. For this type of emissions measurements the receive antenna height is fixed and measurements correlate to Free Space. This measurement is referred to as Free Space Transmission Loss (FSTL) or Free Space Normalised Site Attenuation

Model 1020

This is the most economical chamber in the CAC range (pictured below), providing an excellent EMC engineering tool for pre-complaint immunity and emissions measurements to the most widely used EMC standards.

Panashield Compact Anechoic Chamber Model 1020

Nominal size:  

bullet 6.1 m long x 3 m wide x 2.45 m or 3 m high

Frequency range:  

bullet 30 MHz to 40 GHz

Standard features:  

bullet

Single leaf RF door 914 x 2133 mm high

bullet

Two waveguide vents 300 x 300 mm

bullet

One connector panel 300 x 300 mm

bullet

One 30 amp two wire filter

bullet

Earth/ground stud

bullet

Full or supervised installation

Absorber lining:  

bullet EUT end wall is covered with ferrite absorber panels (and hybrid if required)
bullet Wall behind the antenna and the critical regions of the side walls and ceiling
is covered with a 500 mm deep truncated absorber.
bullet All non critical region are treated with a 300 mm pyramidal absorber.
bullet Patch of pyramidal absorber for immunity testing and for testing above 1 GHz
provided for positioning on the floor between the EUT and antenna.

Typical Options:

bullet Length increased to 7.3 m
bullet Low profile turntable
bullet RF door 1.2 m wide
bullet Patch of ferrite panels on floor

Typical standards:  

bullet EN 50147-part 2
bullet ANSI C63.4
bullet EN 61000-4-3
bullet Various CISPR

Model 1023

Panashield Model 1224 Compact Anechoic Chamber

This is one of the original industry standard EMC Compact Anechoic Chambers designed for EMC full compliant radiated immunity testing for EN61000-4-3 and pre compliant radiated emission measurements for EN30147 part 2 /ANSI C63.4.

For the 18 GHz option with hybrid absorber, the internal width of the chamber is increased to 3.3 m as shown in the photograph.

Nominal size :  

bullet 6.9 m long x 3 or 3.3 m wide x 3 m high

Frequency range:  

bullet Emissions 30 MHz to 1 GHz (option 18 GHz)
bullet Immunity 26 GHz to 1 GHz (option 18 GHz)

Standard features:  

bullet Single leaf RF door 914 x 2133 mm high
bullet Two waveguide vents 300 x 300 mm
bullet One connector panel 300 x 300 mm with two type N connectors
bullet One 30 amp two wire filter
bullet Two 5 amp filters for lighting
bullet Earth/ground stud
bullet Full or supervised installation

Absorber Lining:  

bullet Walls and ceiling covered with ferrite absorber panels.
bullet Patch of ferrite panels for placing on the floor between the EUT and antenna for immunity measurements.

Typical Options: 

bullet Hybrid absorber to increase frequency to 18 GHz (3.3 m wide Model 1224 variant)
is generally preferred for this application
bullet Low profile turntable or raised ground plane (reflective) floor and recessed turntable
bullet RF door 1200 mm wide
bullet Field uniformity measurement per EN 61000-4-3
bullet Site attenuation measurement per EN50147-2 / ANSI C63.4

Typical Standards:  

bullet EN 50147-part 2
bullet ANSI C63.4
bullet EN 61000-4-3
bullet Various CISPR

Model 1224

A larger version of the original Model 1023 Compact Anechoic Chamber (pictured above), this variant is designed for full compliant immunity measurements per EN 61000-4-3 and pre compliant emissions measurements to the procedures of EN50147 part 2 / ANSI C63.4. This larger compact chamber is generally partially lined with hybrid absorber for operation up to 18 GHz.

Nominal size:  

bullet

7.2 long x 3.6 m wide x 3.6 m high

Frequency range:  

bullet

Emissions 30 MHz to 18 GHz (with hybrid absorber)

bullet

Immunity 26 GHz to 18 GHz (with hybrid absorber)

Standard features:  

bullet

Single leaf RF door 914 x 2133 mm high

bullet

Two waveguide vents 300 x 300 mm

bullet

One connector panel 300 x 300 mm with two type N connectors

bullet

One 30 amp two wire filter

bullet

Two 5 amp filters for lighting

bullet

Earth/ground stud

bullet

Full or supervised installation

Absorber Lining:  

bullet

Walls and ceiling covered with ferrite absorber panels

bullet

Patch of ferrite panels for placing on the floor between the EUT and antenna for immunity measurements

bullet

Hybrid absorber on EUT end wall

bullet

Hybrid absorber on critical areas of side walls and ceiling

bullet

Hybrid absorber over ferrite floor patch for testing above 1 GHz

Typical Options: 

bullet

Hybrid absorber included as standard for 18 GHz

bullet

Low profile turntable or raised ground plane (reflective) floor and recessed turntable

bullet

RF door 1.2 m wide

bullet

Field uniformity measurement per EN 61000-4-3

bullet

Site attenuation measurement per EN50147-2 / ANSI C63.4

Typical Standards:  

bullet

EN 50147-part 2

bullet

ANSI C63.4

bullet

EN 61000-4-3

bullet

Various CISPR