Coupled Antenna Module With Sensing Unit for SAR Compliance
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Solution Overview
Problem
The increasing number of antennas in electronic devices complicates design and makes it difficult to meet regulatory SAR (specific absorption rate) requirements while maintaining radio frequency characteristics and reducing production costs.
Innovation Solution
An antenna module comprising a metal antenna unit with a signal portion and a ground portion, and a metal sensing unit with interconnected sensing sections, designed to provide multi-directional sensing without affecting antenna characteristics, using a coupled structure and LDS (laser direct structuring) method, integrated with a dielectric unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are added to electronic devices to support 5G and WiFi 6E, then wireless communication capabilities are improved, but design complexity and difficulty of meeting SAR requirements increase
Solution Approach 1:
The patent combines the antenna unit and sensing unit into a single integrated antenna module. The sensing unit is electrically connected to a sensor and positioned adjacent to the antenna unit without direct electrical connection between them. This merging approach allows the module to provide both wireless communication functionality and sensing capabilities while simplifying the overall design and reducing the number of separate components needed.
Solution Approach 2:
The antenna module is designed to serve multiple functions simultaneously. The antenna unit provides wireless communication signals, while the sensing unit detects external objects or gestures. The module can operate as both a communication antenna and a sensing device, reducing the need for separate antenna and sensor systems.
2Adaptability or versatility
If multiple antennas are added to electronic devices, then communication functionality is enhanced, but meeting SAR regulatory requirements becomes more difficult
Solution Approach 1:
The sensing unit acts as an intermediary between the antenna unit and external objects. By detecting the presence and position of external objects or user gestures, the sensing unit enables the system to adjust antenna operation to comply with SAR requirements. The sensing unit monitors the environment and provides feedback that can be used to control transmission power or antenna switching.
Solution Approach 2:
The sensing unit provides real-time feedback about the surrounding environment and user interaction with the device. This feedback mechanism allows the system to dynamically adjust its operation to maintain SAR compliance while preserving communication functionality. The sensor detects changes in the electromagnetic environment and triggers appropriate responses.
3Ease of manufacture
If traditional antenna designs are used, then production costs may be lower, but radio frequency characteristics and SAR compliance are compromised
Solution Approach 1:
The patent employs LDS (Laser Direct Structuring) technology to manufacture the antenna module. This process allows for precise control of geometric parameters and material properties, enabling optimization of radio frequency characteristics. The laser direct structuring method can create complex three-dimensional structures with high precision, improving antenna performance and SAR compliance while maintaining cost-effectiveness through automated manufacturing.
4Ease of operation
If the sensing unit is electrically connected to the antenna unit, then sensing functionality is improved, but antenna characteristics are affected
Solution Approach 1:
The sensing unit is extracted from the antenna unit in terms of electrical connection. While the sensing unit is positioned adjacent to the antenna unit and both are part of the same module, they are electrically independent. The sensing unit is electrically connected to a sensor but not to the antenna unit, allowing the antenna to maintain its pure radiation characteristics without being influenced by sensing circuitry.
Data Source
AI summary
An antenna module includes an antenna unit and a sensing unit. The antenna unit is made of a metal material. The antenna unit includes a signal portion and a ground portion, and the signal portion includes a first signal section. The sensing unit is made of a metal material and electrically connected to a sensor. The sensing unit includes a first sensing section and a second sensing section. The first sensing section and the second sensing section are electrically connected. A normal direction of the first sensing section is not parallel to a normal direction of the second sensing section. The sensing unit is not connected to the antenna unit. The first sensing section is located adjacent to the first signal section. The normal direction of the second sensing section is not parallel to a normal direction of the first signal section.