Anaechoic Chambers : Absorber Materials - TDK - (Version JPG) - Page n° 9 - PDF Catalogue | Technical Documentation

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ANECHOIC CHAMBERS

Performance of 3-Meter Anechoic Chambers

(hi Field Uniformity for Radiated Immunity Test

STANDARDS: IEC 1000-4- !

Transmit Antenna: • Biconical Antenna (26 MHz - 300 MHZ) • Log-Periodic Antenna 1.300 MHz - 1 GHzi Receive Antenna: • Omni-Direc lional Field Probe (Isotropic Sensor)

Normalized Site Attenuation for Radiated Emission Test

STANDARDS: ANSI C(>.i.4/CISPR I I/CISPR22/EN50147-2

Transmit Antrim,! Heiftht: • Im & 2m High in Horizontal Polarization

• Im & 1.5m High in Vertical Polarization Receive Antennp Height: • l-4m Scanning Range

Amenn.r. »BieoHieal Antenna (30;MHz - too MHz)

• Log-Perioclk Antenna i .300 MHz - 1 GHz)

Field Uniformity

Site Attenuation

Test Area

Frequency

Test Volume

Frequency

The variation of the electromagnetic field is not greater than -OdB, +6dB,over 75"/, of the surface, tie. 12 poinfc of the l (> points.)

Uniformity area: Vertical plane of 0.8m - 2.3m high above the ground plane and 1.5m wide.

lb MHz < F < I GHz

30 MHz < l'é 1 GHz (May l)e extended to 18 GHz and a bove, i

Using broadband antennas, correlation between theoretical NSA (* I) and measured NSA are within ±4dli.

Testing Area: • i.5m diameter

• The number of points lo he tested is I (,. .it 0.5m step.

• The transmitting .inlemu is placed at tin distance from the center of Ihe

uniform plane.

• To perform an immunity test, double-layer ferrite panels or IS-080 S absorbers are placed on Ihe specula? area of Ihe Hour IW: 4.2m x t: i.fimi.

el) NSA: Normalized Site Attenuation

• Tile optimum location ol the receiving anténna will be determined aller the completion "i the < hamlxT.

Standard Field Uniformity

Normalized Site Attenuation

Raditi* 61 test icRion: I Sourtt' .Ulli I 5ffl

Raditi* oi test region: I Um Polarization

Source antenna: 1 (Ini

fol.iri/ation: Vertu al

!.5m * l.ïni Plane 12 Point Deviation

Huri/«Hil.)l ■ ■ ■ Vertiral








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\		■ '.

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Sil 70 UHI 20» «MI SUI 7«) 100»

Frequency «MH/i

IO» 200

frequency (Ml l/l

UHI .'(HI 11X1 4IK> SUO bOQ ~oo ft*' •»«> I0OQ Frequency IMHzi_

Pnl.iri/4lioo: Horizontal

K.idius o( le-l region: I .dm Sourte antenna: J.Om

K.nhn- ni le*l region: I lini Sourte .inlenru: 1.0m

Ptildri/.lliiHi: H<ifi7unt.ll

wo "im uso

IUI .'Oil ll«l

Frequency (MHz!

Frequeiuy (MHz)

Actu.il chamber site attenuation records compared to theoretical N.S.A.

Utilizing TDK IS-080 S absorbers lor immunity testing.

KIY: -Center--Front---Back ----Right

Left

Anaechoic Chambers : Absorber Materials - TDK - #9

Ceramic filter, Ferrite magnet, Network controller, Printer, Test chamber