Shared Antenna Structures for Compact Wireless Devices
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Solution Overview
Problem
Existing electronic devices face challenges in forming antenna structures that are both compact and robust, as they can be sensitive to their position relative to external objects, leading to detuning and inconsistent wireless signal performance.
Innovation Solution
The electronic device incorporates multiple antennas with shared antenna structures at opposing ends, utilizing an inverted-F antenna resonating element formed from peripheral conductive housing structures, a parasitic coupling mechanism, and tunable components to ensure efficient radio-frequency signal transmission across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antennas are made compact, then device size is reduced, but antenna performance becomes sensitive to position relative to external objects
Solution Approach 1:
The patent combines multiple antenna structures (first and second antennas) to share common components (ground structure, resonating element portions) to form a compact integrated antenna system that maintains stable performance through mutual support and reduced sensitivity to external objects
Solution Approach 2:
The shared ground structure and resonating elements serve multiple antenna functions simultaneously, allowing the same physical structure to support both first and second antennas across different frequency bands, reducing overall antenna volume while maintaining reliability
2Reliability
If antennas are made bulky, then antenna performance is more stable, but device size increases
Solution Approach 1:
The patent merges multiple antenna structures into a compact integrated system where first and second antennas share common ground structures and resonating elements, achieving stable performance through mutual support without requiring bulky separate antenna structures
Solution Approach 2:
The antenna structures are nested within the electronic device housing, with resonating elements formed from housing portions and shared ground structures, allowing compact integration while maintaining performance stability through optimized spatial arrangement
3Ease of manufacture
If antennas are formed from housing structures, then manufacturing is simplified, but antenna tuning becomes sensitive to external objects
Solution Approach 1:
The patent combines multiple antenna structures to share common housing-formed components, where the integrated configuration provides mutual support that reduces individual antenna sensitivity to external objects while maintaining manufacturing simplicity
Solution Approach 2:
The patent uses adjustable components (capacitors, inductors) to dynamically tune antenna parameters and compensate for detuning effects caused by external objects, maintaining precise antenna performance despite variations in external environment
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 enhances antenna performance by allowing efficient transmission in multiple frequency bands while minimizing the impact of external objects, optimizing space and signal strength.
Implementation Method 1
an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure... The inverted-F antenna resonating element may be used to convey radio-frequency signals in a first frequency band
Implementation Method 2
The antenna resonating element arm of the additional antenna may be parasitically coupled to the return path of the inverted-F antenna at frequencies in a third frequency band
Implementation Method 3
A portion of the peripheral conductive electronic device housing structure, a portion of the return path for the inverted-F antenna, and a portion of the antenna resonating element arm for the additional antenna may resonate in the third frequency band
Data Source
AI summary
An electronic device may be provided with wireless circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. The antennas may include antenna structures at opposing first and second ends of the electronic device. The antenna structures at a given end of the device may include antenna structures that are shared between multiple antennas. The electronic device may include a first antenna with an inverted-F antenna resonating element formed from portions of a peripheral conductive housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. A return path may bridge the gap. The electronic device may also include a second antenna that includes the antenna ground and an additional antenna resonating element. The antenna resonating element of the second antenna may be parasitically coupled to the return path of the inverted-F antenna at given frequencies.