Self-adaptive Antenna Resonance Tuning for Reconfigurable Devices
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Solution Overview
Problem
Modern electronic devices that can be configured in various physical forms often experience shifts in antenna resonance frequencies due to changes in their configuration, leading to decreased performance as the antenna may resonate outside the target frequency band when reconfigured.
Innovation Solution
A self-adaptive antenna system that tunes its resonance frequency by adjusting its radiating length or feed point position in response to changes in the device's physical configuration, using mechanisms such as coupling with self-adaptive tuning elements or creating electrical shorts, to maintain resonance within a target frequency band across different usage modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device is reconfigured into different physical configurations, then the adaptability and versatility of the device is improved, but the antenna resonance frequency shifts outside the target frequency band causing performance degradation
Solution Approach 1:
The antenna system incorporates a reconfigurable antenna structure with adjustable radiating elements that can dynamically change their configuration. The system includes switching mechanisms (such as PIN diodes or MEMS switches) that allow the antenna to reconfigure its electrical length and geometry in response to different device physical configurations, thereby maintaining resonance within the target frequency band across multiple device states.
Solution Approach 2:
The antenna system changes its electrical parameters (such as resonant frequency, impedance, and radiation pattern) by adjusting the configuration of its radiating elements. This is achieved through variable capacitance or inductance elements, switching networks, or mechanically adjustable components that modify the antenna's electrical characteristics to compensate for shifts caused by device reconfiguration.
2Ease of manufacture
If the antenna structure is fixed for optimal performance in one configuration, then the manufacturing precision and ease of manufacture are improved, but the device cannot adapt to different physical configurations
Solution Approach 1:
The antenna is divided into multiple independent or semi-independent segments or elements that can be individually controlled or adjusted. This segmentation allows each element to be manufactured using standard processes while the overall antenna system achieves reconfigurability through the coordinated arrangement and switching between these segments.
Solution Approach 2:
The antenna structure is designed to serve multiple functions and configurations using a single integrated design. The same physical antenna structure can operate in different modes (such as different frequency bands, different radiation patterns, or different resonant frequencies) through electronic or mechanical reconfiguration, eliminating the need for multiple dedicated antennas for different device states.
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
The self-adaptive antenna system ensures consistent performance across various physical configurations of the electronic device by maintaining resonance within the target frequency band, preventing shifts that would otherwise decrease antenna performance.
Implementation Method 1
an antenna that self-tunes responsive to changes to a physical configuration of the electronic device... self-tunes a frequency of resonance
Data Source
AI summary
An electronic device disclosed herein includes an antenna that self-tunes frequency responsive to changes to a physical configuration of the electronic device to negate a shift in the resonant frequency attributable to the change in physical configuration.