RF Exposure

FCC ID: YZZDP752

RF Exposure Info

Download: PDF

FCCID_4098229

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ181016009-00B

§1.1307 (b) (1) & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE)
Applicable Standard
According to FCC §15.319(i) and §1.1307(b)(1), systems operating under the provisions of this section
shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in
excess of the Commission’s guidelines.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

Frequency Electric Field Magnetic Field Power Density Averaging Time
Range (MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minute)

Limits for General Population/Uncontrolled Exposure
0.3-1.34 614 1.63 *(100) 30
1.34-30 842/f 2.19/f *(180/f2) 30
30-300 27.5 0.073 0.2 30
300-1500 / / f/1500 30
1500-100,000 / / 1.0 30

f = frequency in MHz
* = Plane-wave equivalent power density

MPE Calculation
Predication of MPE limit at a given distance

PG
S=
4R 2

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);

For worst case:

Antenna Gain Conducted Power Evaluation Power
Frequency MPE Limit
Distance Density
(MHz) (dBi) (numeric) (dBm) (mW) (mW/cm2)
(cm) (mW/cm2)
1921.536
- 2.0 1.58 19.0 79.43 20 0.02 1.0
1928.448

Result: The device meets MPE limit at 20 cm distance.

FCC Part 15D Page 10 of 49

Document Created: 2018-11-26 19:27:19
Document Modified: 2018-11-26 19:27:19

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC