Coupled Multi-Band Radiator Layout for Compact Low-SAR Electronics
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Solution Overview
Problem
The increasing functionality of electronic devices requires a large number of radiators, leading to a larger device size, and existing solutions fail to efficiently manage radiator size and radiation performance, especially when human proximity affects radiation efficiency and Specific Absorption Ratio (SAR) values.
Innovation Solution
The electronic device incorporates a first and second feed source, matching circuits, and radiators, where the radiators operate in different frequency bands, with coupling and sub-radiators to enhance bandwidth and reduce size, and includes controllers to adjust current and impedance for improved radiation performance and SAR reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of radiators are installed to meet increasing functionality requirements, then the radiation performance is improved, but the device size increases
Solution Approach 1:
The patent combines multiple radiator functions into a single integrated radiator structure. The radiator is designed with multiple operating bands and modes, allowing it to perform the functions of multiple separate radiators simultaneously, thereby reducing device size while maintaining radiation performance.
Solution Approach 2:
The radiator is designed as a multi-functional component that can operate across multiple frequency bands and support different radiation modes. This universal design allows one radiator to replace multiple specialized radiators, reducing the overall device volume while meeting diverse communication requirements.
2Reliability
If the size of each radiator is increased to ensure good radiation performance, then the radiation efficiency is improved, but the device size increases
Solution Approach 1:
The patent employs parameter changes by adjusting the electrical characteristics of the radiator through variable capacitors and inductors. This allows the radiator to achieve good radiation performance across multiple frequency bands without increasing its physical size, as the performance optimization is achieved through electrical parameter adjustment rather than physical dimension increase.
Solution Approach 2:
The radiator incorporates dynamic tuning capabilities through switches and tuning circuits that allow real-time adjustment of resonant frequencies and impedance matching. This dynamic adaptation enables the radiator to maintain optimal radiation efficiency across different operating conditions without requiring multiple fixed-size radiators.
3Adaptability or versatility
If multiple radiators are installed to cover different frequency bands, then the bandwidth is improved, but the device complexity increases
Solution Approach 1:
The patent segments the frequency bands and radiation modes within a single radiator structure. By dividing the radiator into different operational segments that can be independently activated or tuned, the system achieves multi-band coverage without requiring multiple separate radiator assemblies, thereby reducing overall device complexity.
Solution Approach 2:
A single universal radiator design covers multiple frequency bands through integrated tuning mechanisms. This eliminates the need for separate radiators for different bands, reducing the number of components and simplifying the overall device architecture while maintaining broad bandwidth capability.
4Reliability
If the number of radiators is increased to meet functionality requirements, then the radiation coverage is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple radiator functions into a single manufactured component. This consolidation reduces the total number of parts that need to be manufactured, assembled, and tested, thereby lowering manufacturing costs while maintaining comprehensive radiation coverage through the multi-functional radiator design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration increases the bandwidth, reduces device size, and disperses energy to minimize SAR values when a human body is near, ensuring better radiation performance and safety.
Implementation Method 1
a first radiator (12) and a second radiator (22), where... the first radiator (12) is coupled to the second radiator (22)
Data Source
AI summary
This application discloses an electronic device including a first feed source, a second feed source, a first matching circuit, a second matching circuit, a first radiator, and a second radiator. The first feed source is electrically connected to the first radiator through the first matching circuit, the second feed source is electrically connected to the second radiator through the second matching circuit, and the first radiator is coupled to the second radiator. Under the action of a first excitation signal input by the first feed source, the first radiator operates in a first band and the second radiator operates in a second band; and under the action of a second excitation signal input by the second feed source, the second radiator operates in a third band and the first radiator operates in a fourth band.