Invention Grant
- Patent Title: Methods for reducing near-field radiation and specific absorption rate (SAR) values in communications devices
- Patent Title (中): 降低通信设备中近场辐射和比吸收率(SAR)值的方法
-
Application No.: US12786032Application Date: 2010-05-24
-
Publication No.: US08344956B2Publication Date: 2013-01-01
- Inventor: Mark T. Montgomery , Frank M. Caimi , Paul A. Tornatta, Jr. , Mark W. Kishler , Li Chen
- Applicant: Mark T. Montgomery , Frank M. Caimi , Paul A. Tornatta, Jr. , Mark W. Kishler , Li Chen
- Applicant Address: US FL Viera
- Assignee: SkyCross, Inc.
- Current Assignee: SkyCross, Inc.
- Current Assignee Address: US FL Viera
- Agency: Foley Hoag LLP
- Agent Rajesh Vallabh
- Main IPC: H01Q1/24
- IPC: H01Q1/24

Abstract:
A method is provided for reducing near-field radiation and specific absorption rate (SAR) values in a communications device. The communications device includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure. The method includes adjusting the relative phase between signals fed to neighboring antenna ports of the antenna structure such that a signal fed to the one antenna port has a different phase than a signal fed to the neighboring antenna port to provide antenna pattern control and to increase gain in a selected direction toward a receive point. The method features using a transmit power lower than the transmit power used in a non-pattern control operation of the antenna structure such that the communications device obtains generally equivalent wireless link performance with the receive point using reduced transmit power compared to the non-pattern control operation, thereby reducing the specific absorption rate.
Public/Granted literature
Information query