Adjustable Antenna Structures with Conductive Display Frames
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Solution Overview
Problem
Existing electronic devices with wireless communications circuitry face challenges in forming antenna structures that are both compact and robust, as they can be sensitive to external objects and require precise positioning to maintain optimal performance.
Innovation Solution
The implementation of adjustable antenna structures within electronic devices, utilizing conductive housing structures and display ground planes with distributed capacitance, allows for impedance matching and tuning across various frequency bands, enabling flexible operation modes and reduced sensitivity to external objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If compact antenna structures are used, then device size is reduced, but antenna performance becomes sensitive to external objects and positioning
Solution Approach 1:
The patent implements adjustable antenna structures with movable components that can be repositioned along the antenna element. This dynamic adjustment capability allows the antenna to adapt its configuration in response to external objects or positioning changes, maintaining stable performance despite the compact form factor. The adjustable nature compensates for the sensitivity inherent in small antennas by enabling real-time optimization of the radiating structure.
2Reliability
If antenna structures are made robust and less sensitive to external objects, then performance stability improves, but device size and complexity increase
Solution Approach 1:
The antenna structure is divided into multiple segments or sections, with at least one adjustable component that can be independently positioned. This segmentation allows different portions of the antenna to serve different functions: some parts provide structural stability and grounding, while others provide adjustable radiating elements. The segmented approach enables robust performance without requiring a monolithic large-scale structure.
Solution Approach 2:
The adjustable components are integrated within the existing antenna housing structure, with movable elements nested along the antenna element. This nesting approach allows the adjustment mechanism to be compact and integrated rather than external, maintaining a small overall device size while providing the robustness of an adjustable, adaptable antenna system.
3Manufacturing precision
If precise positioning of antenna components is required, then antenna performance is optimized, but manufacturing and assembly complexity increases
Solution Approach 1:
The antenna incorporates adjustable components that can be positioned and locked at specific locations along the antenna element. This dynamic positioning capability allows for post-assembly tuning and adjustment, reducing the need for extremely tight manufacturing tolerances during initial assembly. The adjustability compensates for minor positioning variations and enables optimization after manufacturing.
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 solution enhances antenna efficiency and performance by allowing the device to maintain optimal wireless communication across a wide range of frequencies and operating conditions, even when subjected to varying external loads, such as being held by different hands.
Implementation Method 1
The second portion may be configured to form a distributed impedance matching capacitance with the antenna resonating element arm
Data Source
AI summary
An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna in the electronic device may have an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna ground for the antenna may include a conductive frame for the display. The conductive frame may have a first portion that is separated from the antenna resonating element arm by a first distance and a second portion that is separated from the antenna resonating element arm by a second distance that is less than the first distance. The second portion may be configured to form a distributed impedance matching capacitance with the antenna resonating element arm.