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Emf-limit compliant transmission with multiple antenna elements

An antenna unit, transmission node technology, applied in radio transmission systems, diversity/multi-antenna systems, antennas, etc., and can solve problems such as high frequency increase

Active Publication Date: 2018-10-23
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For such devices, it has been shown that current EMF exposure limits above 6GHz are more restrictive than frequencies below 6GHz in terms of maximum possible transmitted power
In particular, it can be considered that the relative importance of EMF limitation increases for such high frequencies compared to other conditions that limit transmission power (e.g. interference conditions)

Method used

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  • Emf-limit compliant transmission with multiple antenna elements
  • Emf-limit compliant transmission with multiple antenna elements
  • Emf-limit compliant transmission with multiple antenna elements

Examples

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Embodiment Construction

[0023] The present disclosure relates in particular to the possibility of a wireless communication device like a transmission node to manage the spatial and temporal distribution of wireless signal emissions in order to reduce the minimum distance to comply with electromagnetic field (EMF) exposure restrictions, especially for radio frequency (RF). The disclosed method is suitable for, but not limited to, future wireless communication devices (5G) operating in high frequency bands (eg, 6GHz or higher).

[0024] It is expected that future communication spectrum, for example for 5G technology, will be expanded to include frequency bands above 6 GHz. At these frequencies, the relatively small wavelength allows the use of smaller antenna elements, opening up the possibility of integrating more antennas or antenna elements (or antenna arrays or arrangements) even on devices with small form factors (transmission nodes) such as terminals possibility.

[0025] At frequencies above 6G...

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PUM

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Abstract

The present disclosure pertains to a transmitting node (10) for a wireless communication network. The transmitting node (10) is adapted for transmission utilizing independently controllable antenna elements of an antenna arrangement (24). Moreover, the transmitting node (10) is adapted for switching between different beams and / or subsets of the antenna elements for transmission based on transmitted power in relation to EMF exposure limits. There are also disclosed related devices and methods.

Description

technical field [0001] The present disclosure relates to transmissions in wireless communication networks, and more particularly to transmissions utilizing multiple antenna elements. Background technique [0002] For wireless communication networks, and especially for transmission nodes of such networks, such as user equipment or terminals, electromagnetic field (EMF) exposure limits, usually defined by government regulations, apply. This limitation can be particularly relevant for nodes used close to the human body, such as user equipment like smartphones. For such devices, it has been shown that current EMF exposure limits above 6 GHz are more restrictive than frequencies below 6 GHz in terms of maximum possible transmitted power. In particular, the relative importance of EMF limitation can be considered to increase for such high frequencies compared to other conditions that limit transmission power (eg interference conditions). Contents of the invention [0003] It is...

Claims

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Application Information

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IPC IPC(8): H01Q3/24H04B7/06H01Q1/24H04B1/3827H04W52/36
CPCH01Q1/245H01Q3/24H04B1/3838H04B7/0617H04B7/0691H04B7/0695H04W52/367
Inventor D·科隆比C·托尔内维克R·巴尔德梅尔B·托尔斯
Owner TELEFON AB LM ERICSSON (PUBL)