Reduction of cephalic absorption of radiation from mobile communication devices

Patent metadata

Field	Value
Publication number	US-9214977-B2
Application number	US-201113500907-A
Country	US
Kind code	B2
Filing date	Dec 28, 2011
Priority date	Dec 28, 2011
Publication date	Dec 15, 2015
Grant date	Dec 15, 2015

Abstract

Technologies are described for reliably constraining a maximum transmission power of a mobile communication device such as a cellular phone so that RF radiation associated with that transmission and incident to a head of the device's user can be held at or below predetermined “safe” levels. Upon determining an operational or communication mode of the mobile communication device where it is likely to be held against or very near the user's head, its maximum transmit power may be reduced until the near-head operation is completed. The reduction may be to a fixed maximum level or may be adjusted to allow for a maximum amount of radiated energy over a period of time. The reduction may also take into account adjustment factors such as frequency band, modulation, antenna gain, and similar factors.

First claim

What is claimed is:

1. A method to reduce cephalic absorption of radio frequency (RF) radiation from a mobile communication device, the method comprising:
determining an operation mode of the mobile communication device;
determining whether the operation mode involves a near-head operation;
in response to a determination that the operation mode of the mobile communication device involves the near-head operation,
determining a maximum transmit power level in a constrained max…

Assignees

• Drucker Elliott H
• Empire Technology Dev Llc

Inventors

• Drucker Elliott H

Classifications

• H04W52/283

  Electricity · mapped topic

• H04W52/367

  Electricity · mapped topic

• H04W52/288

  Electricity · mapped topic

• H04B1/3838 Primary

  Electricity · mapped topic

• Y02B60/50

  Cross-Sectional Technologies · mapped topic