Compact Chambers

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.

One of the largest EMC compact anechoic chambers constructed (pictured above), nominal size 7.5 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 +/- 4 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.

Nominal size:

• Typical sizes are; 6.1 m to 7.2 m long x 3 m wide x 2.45 m or 3 m high

Frequency range:

• 30 MHz to 40 GHz

Standard features:

• Single leaf RF door 914 x 2133 mm high
• Two waveguide vents 300 x 300 mm
• One connector panel 300 x 300 mm
• One 30 amp two wire filter
• Earth/ground stud
• Full or supervised installation

Absorber lining:

• EUT end wall is covered with ferrite absorber panels (and hybrid if required)
• Wall behind the antenna and the critical regions of the side walls and ceiling is covered with a 500 mm deep truncated absorber.
• All non critical region are treated with a 300 mm pyramidal absorber
• 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:

• Low profile turntable
• RF door 1.2 m wide
• Patch of ferrite panels on floor

Typical standards:

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

Model 1224

The Model 1224 Compact Anechoic Chamber (pictured above), has been 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 and CISPR16-1-4. This larger compact chamber is generally partially lined with hybrid absorber for operation up to 18 GHz.

Nominal size:

• 7.2 long x 3.6 m wide x 3.6 m high

Frequency range:

• Emissions 30 MHz to 18 GHz (with hybrid absorber)
• Immunity 80 MHz to 6/18 GHz (with hybrid absorber)

Standard features:

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

Absorber Lining:

• Walls and ceiling covered with ferrite absorber panels
• Patch of ferrite panels for placing on the floor between the EUT and antenna for immunity measurements
• Hybrid absorber on EUT end wall
• Hybrid absorber on critical areas of side walls and ceiling
• Hybrid absorber over ferrite floor patch for testing above 1 GHz

Typical Options:

• Hybrid absorber included as standard for 18 GHz
• Low profile turntable or raised ground plane (reflective) floor and recessed turntable
• RF door 1.2 m wide
• Field uniformity measurement per EN 61000-4-3
• Site attenuation measurement per EN50147-2 / ANSI C63.4 / CISPR16-1-4

Typical Standards:

• EN 50147-part 2
• ANSI C63.4
• EN 61000-4-3
• CISPR16-1-4