RF EXPOSURE

FCC ID: MSQWL138GV2R2

RF Exposure Info

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FCCID_589049

Measurement of Maximum Permissible Exposure ------------------------------------------ 1/3

Measurement of Maximum Permissible Exposure

1. Foreword

In adopt with the Human Exposure IEEE C95.1, and according to the FCC 1.1310. The
Maximum Permissible Exposure (MPE) is obligated to measure in order to prove the safety of
radiation harmfulness to the human body.

The Gain of the antenna used is measured in an Anechoic chamber. The maximum total power
to the antenna is to be recorded. By adopting the Friis Transmission Formula and the power
gain of the antenna, we can find the distance right away from the product, where the limit of the
MPE is.

2. Description of EUT
FCC ID : MSQWL138GV2R2
Product name : ASUS WLAN PCI Card
Model name : WL-138g V2
Classification : Mobile Device
(i) Under normal use condition, the antenna is at least 20cm away
from the user;
(ii) Warning statement for keeping 20cm separation distance and the
prohibition of operating next to the person has been printed in the
user’s manual
Frequency Range : 2.412 GHz ~ 2.462GHz
Supported Channel : 11 Channels
Modulation Skill : DBPSK, DQPSK, CCK, OFDM
Power Type : Powered by PCI of client’s device

Applicant: ASUSTeK Computer Inc. FCC ID: MSQWL138GV2R2
Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440

Measurement of Maximum Permissible Exposure ------------------------------------------ 2/3

3. Limits for Maximum Permissible Exposure (MPE)
Frequency Electric Field Magnetic Filed Power Density (S) Averaging Time
Range Strength (V/m) Strength (H) (mW/cm2) |E|2, |H|2 or S
(MHz) (A/m) (minutes)
(A) Limits for Occupational/Controlled Exposure
0.3-3.0 614 1.63 100 6
2
3.0-30 1842/f 4.89/f 900/f 6
30-300 61.4 0.163 1.0 6
300-1500 -- -- f/300 6
1500-100,000 -- -- 5 6
(B) Limits for General Population/Uncontrolled Exposure
0.3-1.34 614 1.63 100 30
2
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 30
[The EUT is tested in transmit and receive modes and in the first, middle and the last channel separately. The
following shows only our observation have the greatest emissions.]

According to OET BULLETIN 56 Fourth Edition/August 1999, Equation for Predicting RF Fields:

PG 92.25714 ×1.58489
Friis Transmission Formula: S = = = 0.029 mW / cm 2
4πR 2
4π ( 20) 2

PG 92.25714 × 1.58489
Estimated safe separation: R= = = 3.411cm
4π 4π
Remarks: "The safe estimated separation that the user must maintain from the antenna is at least 3.41cm."

Where: S = power density (in appropriate units, e.g. mW/cm2)
P = power input to the antenna (in appropriate units, e.g., mW)
G = power gain of the antenna in the direction of interest relative to an isotropic radiator
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm)

The Numeric gain G of antenna with a gain specified in dB is determined by:
G = Log -1 ( dB antenna gain / 10 )
-1
G = Log (2.0 / 10) = 1.58489

Applicant: ASUSTeK Computer Inc. FCC ID: MSQWL138GV2R2
Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440

Measurement of Maximum Permissible Exposure ------------------------------------------ 3/3

Appendix

Antenna Specification

Applicant: ASUSTeK Computer Inc. FCC ID: MSQWL138GV2R2
Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440

PRODUCT DOC. No: WL-TL-17
NInput Output
SPECIFICATION DATE: 25-MAR-02
Enterprise Corp.
REV. : C

PRODUCT NAME

2.4G ANTENNA WITH RP SMA

PART NUMBER

□ W205-108-D200

Signed By Customers
Approved By:

供應商: 垠旺精密股份有限公司

TEL:02-2917-7528;FAX:02-2912-1659

台北縣新店市寶興路 37 號 3 樓

PRODUCT
DOC. No: WL-TL-17
NInput Output SPECIFICATION
DATE: 25-MAR-02
Enterprise Corp. 2.4 G ANTENNA WITH RP-SMA PLUG
REV. : C

7 銷仔 Brass 鍍鎳
6 帽套 TPR Black
5 底座 ABS Black
4 天線座 ABS Black
3 RP SMA扭殼 Brass 鍍黑鉻
2 Contacter端子 Be.Copper 鍍金30u"
1 RP SMA主體 Brass 鍍金4u"
ITEM DESCRIPTION MATERIALS FINISHED

PRODUCT DOC. No: WL-TL-17
NInput Output
SPECIFICATION DATE: 25-MAR-02
Enterprise Corp.
2.4 G ANTENNA WITH RP-SMA PLUG REV. : C

W205-108-D200 2.4G ANTENNA
SPECIFICATION
1. Electrical Properties

1-1 Frequency Range …………………….2.4~2.5GHz

1-2 Impedance………………………..…..50 Ohms nominal

1-3 V.S.W.R………..…….………….……2.0 (Max.)

1-4 Return Loss……………………….…-10.0 dB(Max.)

1-5 Max. Gain…………………………….2.0dBi

1-6 Polarization……………………. Vertical

1-7 Admitted Power………………………1W

1-8 Electrical Wave……………………….1/4 ‫ ג‬Dipole

2. Mechanical Properties

2-1 Connector………………...…Reverse SMA Plug

Cable……………………………..…RG178

2-3 Antenna Body………………………T.P.R.

2-4 Operating Temperature Range..……-20℃ ~ +50℃

2-5 Storage Temperature Range………. -20℃ ~ +50℃

Document Created: 2005-09-27 14:50:59
Document Modified: 2005-09-27 14:50:59

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