0199000019 Fair-Rite, 0199000019 Datasheet - Page 150

• Manufacturer Part Number: 0199000019
• Description: BEAD KIT, EMI SUPPRESSION
• Manufacturer: Fair-Rite

Specifications of 0199000019

• Kit Contents: Contains 28 Different Beads In Three Suppression Materials, 73, 43 And 61.
• Component Type: Shield Bead Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 3
Wide Angle Absorption
One of the most overlooked aspects of using any absorber is the
rolloff of absorption with increasing angle of incidence. Most pub-
lished absorber data contains only normal incidence return loss
(dB) which is typically where the maximum absorption is obtained.
Normal incidence is defined as plane wave radation arriving per-
pendicular (0°) to the plane of the absorbing surface. The curves
in Figure 4 were generated using equations described in IEEE
document “Recommended Practice for RF Absorber Evaluation
in the range 30 MHz to 5 GHz”. Since the reflections occuring in
anechoic chambers seldom illuminate absorber materials at 0°, it
is important to consider the reflection angles generated by each
chamber geometry and size for best results. For most chambers,
the range of angles is in the 40-60° range, however it is usually
desirable to operate at < 50°.
F a i r-Ri t e Produ cts C o rp .
Phone:
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Technical Information
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Figure 2
(888) FAIR RITE / [phone] • FAX: (888) FERRITE / [phone]
[phone]
Typical Return Loss vs. Tile Thickness
100
Ferrite
Dielectric
5.4mm
6.3mm
Spacer
Frequency (MHz)
6.0mm
5.7mm
Spacer Thickness = 13mm
1000
Metal
Wall
(888) 337 -7483
10000
Return loss vs angle of incidence for TM polarization is shown
in Figure 4. Return loss curves for TE polarization (not shown)
are similar.
Figure 4
Precision Dimensions
Studies have shown that maximum low-frequency performance is
obtained when tile to tile gaps are minimized. Fair-Rite precisely
machines each of the six surfaces to ± 0.13mm (.005”) to ensure
a tight tile to tile fit for easier installation with less cutting required.
Figure 5 illustrates the effect of gaps on tile performance when
installed with: no gap (0mm), 0.25mm and 1.0mm. It is critical to
maintain contact between tiles for best results. The final results
of the completed test chamber will also be degraded by other
factors such as lights, gaps around door openings, and exposed
metallic conduit.
Figure 5
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Wide-Angle Return Loss – TM Polarization
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• www.fair-rite.com
• E-Mail: [e-mail]
PO Box J, One Commercial Row, Wallkill, NY 12589-0288
Reflectivity vs. Tile – Tile Gap Size
75˚
60˚
45˚
30˚
0˚
100
1.0mm
.25mm
Frequency (MHz)
0mm
Frequency (MHz)
1000
10000
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