Multi-Feed Antenna Module for Lower SAR and Better Directivity
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Solution Overview
Problem
Antenna designs in terminal devices face challenges in simultaneously meeting multiple performance metrics due to size and integration constraints, leading to increased Specific Absorption Ratio (SAR) and reduced communication performance without altering the radio frequency architecture.
Innovation Solution
An antenna module with a power distribution network and multiple feed points per radiator, forming an antenna cluster that distributes radio frequency signals to multiple feed points, reducing energy concentration and exciting diverse radiation patterns to improve directivity and communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power is increased to improve OTA performance, then communication performance is improved, but SAR value increases
Solution Approach 1:
The patent divides a single antenna radiator into multiple feed points (e.g., first feed point, second feed point, third feed point) that can be independently excited. This segmentation allows the radiated energy to be distributed across multiple locations rather than concentrated at one point, reducing the SAR value while maintaining overall communication performance through the combined effect of all feed points.
2Volume of moving object
If antenna size is reduced to meet integration requirements, then device integration is improved, but antenna performance deteriorates
Solution Approach 1:
The patent applies local quality by creating different radiation patterns from different feed points within the same antenna structure. Each feed point can be optimized for specific directional coverage or frequency ranges, allowing the compact antenna to achieve diverse radiation characteristics and maintain good performance across multiple scenarios despite reduced overall size.
Solution Approach 2:
The patent introduces spatial dimensionality by distributing multiple feed points at different locations and orientations within the compact antenna structure. This multi-dimensional arrangement of feed points enables the antenna to achieve diverse radiation patterns and improve performance in various directions, effectively compensating for the reduced size through spatial optimization.
3Device complexity
If single feed point is used to simplify structure, then device complexity is reduced, but radiation pattern diversity is limited
Solution Approach 1:
The patent makes the antenna structure multi-functional by enabling each feed point to serve multiple purposes: individual feed points can be activated separately for directional communication, combined for omnidirectional coverage, or selectively activated based on frequency bands. This universal design allows the same antenna structure to adapt to various communication scenarios without requiring multiple separate antennas.
Data Source
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AI summary
Embodiments of this application provide an antenna module and an electronic device. The antenna module includes at least one antenna radiator and a power distribution network, where a plurality of feed ports of the power distribution network are configured to connect to a plurality of corresponding feed points of the at least one antenna radiator, each antenna radiator including a plurality of feed points, and the power distribution network is configured to distribute a radio frequency signal to the corresponding plurality of feed points of the antenna radiator.