Asus WL-500b Spezifikationen PDF herunterladen (Seite 191)

Training Research Co., Ltd.

No. 255, Nan-yang Street, Shijr City, Taipei Hsien 221, Taiwan

Tel: 886-2-26935155 Fax: 886-2-26934440 e-mail: [email protected]

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TRC

Since1985

3. Limits for Maximum Permissible Exposure (MPE)

Frequency

Range

(MHz)

Electric Field

Strength (V/m)

Magnetic Filed

Strength (H)

(A/m)

Power Density (S)

(mW/cm2)

Averaging Time

|E|

, |H|

or S

(minutes)

(A) Limits for Occupational/Controlled Exposure

0.3-3.0 614 1.63 100 6

3.0-30 1842/f 4.89/f 900/f

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

1.34-30 824/f 2.19/f 180/f

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:

Friis Transmission Formula:

/10069.2

)20(4

249.2238.46

cmmW

−

×=

ππ

Estimated safe separation: cm

R 877.2

249.2238.46

ππ

Remarks: "The safe estimated separation that the user must maintain from the antenna is at least 2.877 cm."

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

( dBi antenna gain / 10 )

G = Log

-1

(3.52 / 10) = 2.249

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