SXPCEAN2 PCI Express Half mini card WLAN module RF Exposure Info MPE calculation Phoenix Contact GmbH & Co. KG

Phoenix Contact GmbH & Co. KG PCI Express Half mini card WLAN module

Page 1 of SXPCEAN2 PCI Express Half mini card WLAN module RF Exposure Info MPE calculation Phoenix Contact GmbH & Co. KG
Page 2 of SXPCEAN2 PCI Express Half mini card WLAN module RF Exposure Info MPE calculation Phoenix Contact GmbH & Co. KG

Calculation:
RF-Exposure for 2.4 & 5 GHz WLAN module
Type identification: SX-PCEAN2
FCC ID:
YG3-SXPCEAN2
Subject of Investigation
According the 47CFR §2.1091 the SX-PCEAN2 from PHOENIX CONTACT
Electronics GmbH (FCC ID: YG3-SXPCEAN2) has been defined as a mobile device,
used in such a way that a separation distance of at least 20 cm is normally
maintained between the device and the user. The human exposure to RF emissions
from such devices could be evaluated based on the MPE limits adopted by the FCC
for electric and magnetic field strength and / or power density. The limits for
Occupational / Controlled Exposure are given in Table 1, the limits for General
Population / Uncontrolled Exposure are given in Table 2.
Frequency
Range [MHz]
Electric Field
Strength (E)
[V/m]
Magnetic Field
Power Density
Strength (H)
(S) [mW/cm²]
[A/m]
0.3 – 3.0
614
1.63
(100)*
3.0 – 30
1842/f
4.89/f
(900/f)*
30 – 300
61.4
0.163
1.0
300 – 1500
f/300
1500 – 100,000
Averaging
Time |E|²,|H|²
or S [min]
Table 1: Limits for Occupational / Controlled Exposure.
Frequency
Range [MHz]
Electric Field
Strength (E)
[V/m]
Magnetic Field
Strength (H)
[A/m]
Power Density
(S) [mW/cm²]
Averaging
Time |E|²,|H|²
or S [min]
0.3 – 1.34
614
1.63
(100)*
30
1.34 – 30
824/f
2.19/f
(180/f)*
30
30 – 300
27.5
0.073
0.2
30
300 – 1500
f/1500
30
1500 – 100,000
1.0
Table 2: Limits for General Population / Uncontrolled Exposure.
Note: f = frequency in MHz; * Plane – wave equivalent power density
MPE evaluation
In accordance to the CFR Part 47, §2.1091
S:
Limit for power density according to CFR Part 47, §1.1310:
1 mW/cm2
P:
512.9 mW* (averaged over 30 min with both antenna ports active)
G:
3.8 dBi = 2.4 (array gain for both antennas)
D:
Duty cycle: 100 % = 1
R:
Distance in what the limit of S has to be reached: 0.2 m
S=
P ⋅G ⋅ D
4 ⋅π ⋅ R2
⇒ S=
512.9mW ⋅ 2.4 ⋅ 1
mW
= 0.245 2
4 ⋅ π ⋅ (20cm)
cm
The value for the “General population / Uncontrolled Exposure” of the power density
is below the limit of CFR Part 47, §1.1310.
Limits and calculated results
The results for SX-PCEAN2 are given in Table 3 and based on the power
measurements shown in Phoenix Testlab Report F161629E1&E2
Band
CH
[MHz]
2.4
GHz
2437
[cm]
EIRP
[dBm]
EIRP
[mW]
Power
Density
[mW/cm²]
Limit of
Power
Density
[mW/cm²]
Evaluation
Result
20
30.9*
1230*
0.245*
1.0
Complies
Table 3: Calculated results for the SX-PCEAN2 compared to the limit for
uncontrolled exposure.
* Including 2.5 dB maximum tune-up range
The SX-PCEAN2 from PHOENIX CONTACT Electronics GmbH
(FCC ID: YG3-SXPCEAN2) is in compliance with the
maximum permissible exposure (MPE) limits for the Power Density given by
the FCC 47CFR §1.1310 (4)(e) Table 1.
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Document DescriptionMPE calculation
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Permanent ConfidentialNo
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Document TitleMPE calculation

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