Tokin EMC for EMC testing/diagnosis and an anechoic chamber

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Outline
Anechoic Chamber
+ 10m Method
+ 3m Method
+ 3m Method
(small-sized)
+ EMI/Microwave
+ Microwave
+ Construction
Example
Anechoic Box
 
Anechoic Chamber

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Anechoic Chamber for EMI/Microwave

Features (ALC-ME)

  • Provided with both characteristics of complete anechoic chamber which produces an pseudo-free space within the microwave ranges, and semi-anechoic chamber which enables EMI measurement (for 3m regulations), as the radio wave absorber on the floor travels automatically.
  • Wide range (30 MHz to 100 GHz) radio wave absorption is achieved by matching technology of ferrite radio wave absorber and the pyramid type urethane radio wave matching device, as well as the design technology of anechoic chambers.
  • GP-IB controlled attached facility allowing for automatic instrumentation in a short time.
Anechoic Chamber for EMI/Microwave

Anechoic Chamber for EMI/Microwave
(Photo by NEC Corporation)

catalog

Floor Rising
(Photo by NEC Corporation)
Floor Traveling
(Photo by NEC Corporation)
EMI measuring
(Photo by NEC Corporation)
 

Features (ALC-MX)

  • Applicable to designs and constructions in various specifications
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(Photo by KOKUSAI ELECTRIC CO., LTD.)

 

Standard Specifications

Type
ALC-ME
ALC-MX
Shield inside dimensions (m)
20.0L×10.0W×10.0H
35L×10W×7H
Quiet Zone
Quiet zone dimension. Diameter: 3m
Pass length transmission distance: 10m
0.3GH to 35dB and below
1GHz to 45dB and below
10GHz to 50dB and below
50GHz to 55dB and below
Quiet zone dimension. Diameter: 1.0./0.5m
Pass length transmission distance: 25m
500MHz to 25dB and below
1GHz to 30dB and below
10GHz to 40dB and below
100GHz to 50dB and below
Site attenuation characteristic(dB)
(ANSI C63.4 sweep frequency)
EMI measurement for
3m regurations
±3(at 30 to 1000MHz)
-
Field distribution uniformity characteristic (dB)
(IEC61000-4-3 conforming)
0 to 6(at 80 to 1000MHz)
(Floor type radio wave absorber installation)
-
Shield effectiveness (dB)
(IEEE-STD 299-1997 conforming)
100(at 150kHz to 1000MHz)
60(at 1GHz to 18GHz)
80
(at 1GHz to 100GHz)
Insertion loss (dB)
(MIL STD-220A conforming)
100(at 150kHz to 10GHz)
Optional 100
(at 150kHz to 10GHz)
Radio wave absorber
Ferrite radio wave absorber (TFA) +
Pyramid type urethane radio wave matching device
Pyramid type urethane radio wave absorber
Door dimensions (m)
3.0W×2.0H
1.0W×2.0H
1.0W×2.0H
1.0W×2.0H
Antenna lift
Lifting range (m)
Lifting speed (sec/m)
1.0 to 4.0
5 to 25(GP-IB control)
-
Turntable
Dimension (m)
Load capacity (kg)
Rotating speed (rpm)
1.5
250
1/3(3-stage selection, GP-IB control)
-
Attached facilities
ITV system/Interphone
Power supply
Power supply panel/Filter panel/Insulating transformer/Lighting, etc.
 
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