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| UHF band
patterned absorption sheets, for example, can be
placed over a metal surface or between multiple
systems to prevent electromagnetic interference
and interference among multiple systems in UHF
band RFID tag systems. Our proprietary patterned
radio wave absorber design technology has enabled
us to produce radio wave absorbers of unprecedented
thinness and performance. |
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High degree of absorption of unnecessary
radio waves in UHF band. (Blocks radio waves without
causing reflecting.) |
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Overall thickness of just 7.5 mm
is achieved. |
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Usable for communication frequencies
in EU, the United States, South Korea, etc. |
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Easily shaped, etc.
at the site by trimming with a cutter or punching
holes. |
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Preventing electromagnetic
interference among multi-gates |
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Preventing reflection from metal
objects |
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Used for simple anechoic chambers |
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| Features |
UHF
band patterned absorption sheet |
| Type
Notation |
PFN14-950M |
| Usable
Frequency Range (MHz) |
950
MHz band width |
| Radio
Wave Absorption Performance (dB)
*1 |
Over
15 |
| Product
Thickness (mm) |
7.5 |
| Standard
Product Dimensions (mm) |
900 × 1800 |
| Standard
Product Weight (kg/sheet) |
7.5
kg |
| Applicable
Temperature Range (°C) |
-10
to +50 |
| Compression
Strength (JIS K 6254) |
0.7
MN/m2 (at
5 % compression) |
| Tensile
Strength (JIS
K 6256) |
5
MN/m2 |
| Shipment
Format |
Sheets |
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* TE and TM absorption performance
at 953MHz and oblique incidence of 10° (*1)
* Please contact us about sheet dimensions. |
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| Sample size: 900 × 1800 (mm) |
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| *
Absorption performance at oblique incidence of
10° |
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| Radio wave absorption
performance at 953 MHz |
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| Oblique
incidence （°） |
TE wave
(dB) |
TM wave
(dB) |
| 10 |
24 |
25 |
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| * Figures above are neither
standard nor guaranteed values. |
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We evaluated
reception stability in relation to the distance
between the reader and transmission radio
wave in an anechoic chamber. |
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Since the floor of an ordinary
anechoic chamber is made of metal, standing
waves are generated when the communication
distance exceeds approximately 1 m at a measured
height of 1.23 m. |
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Locations with poor reception
result from the standing waves, and these
can become unreadable regions (null points)
if the reception power is below the tag’s
receptivity. |
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By layering a patterned absorption
sheet (7.5 mm thick) over the metal surface,
standing waves are suppressed, causing the
behavior to approach free space transmission
loss (theoretical value) and improving the
wireless communication environment. |
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Also, pattern absorption
sheets offered the same level of improvement
in the communication environment as a pyramidal
absorber (20 cm high). |
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