Antenna Impedance Tuning via Touchscreen Input Detection
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Solution Overview
Problem
Portable information handling systems face challenges in maintaining efficient wireless communication due to impedance matching issues caused by end user contact with antennas, leading to degraded signal transmission and reception, especially in less-than-ideal environments.
Innovation Solution
A system that monitors touchscreen inputs to adjust antenna performance settings by using an antenna controller and performance table to tune impedance and select the most effective antenna, leveraging existing touchscreen sensors to adapt to near-field effects and improve antenna efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antenna is placed in close proximity to touchscreen display to achieve thin mobile device profile, then device mobility and portability are improved, but impedance matching between antenna and radio circuitry degrades due to end user contact or proximity
Solution Approach 1:
The patent implements dynamic antenna management that continuously monitors touchscreen inputs and adjusts antenna performance settings in real-time. The system detects touch location and area, retrieves corresponding impedance settings from a performance table, and dynamically retunes the antenna to maintain optimal impedance matching despite user contact or proximity.
Solution Approach 2:
The patent changes the impedance parameters of the antenna based on detected touchscreen input patterns. By storing multiple impedance settings in a performance table corresponding to different touch scenarios, the system adjusts electrical parameters to compensate for near-field effects caused by user contact, thereby maintaining reliable wireless communication in a thin device profile.
2Reliability
If radio circuitry increases transmission power to compensate for degraded antenna efficiency, then signal transmission and reception are improved, but power consumption increases and battery life decreases
Solution Approach 1:
The patent implements a feedback mechanism where the antenna controller monitors touchscreen inputs and their impact on antenna performance. By detecting touch location and area, the system retrieves pre-determined impedance settings from a performance table and adjusts antenna tuning accordingly. This feedback loop maintains optimal antenna efficiency without requiring increased transmission power, thereby preserving battery life.
3Adaptability or versatility
If multiple antenna performance settings are stored and monitored to adapt to different touch patterns, then antenna efficiency is maintained under various conditions, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-storing multiple antenna performance settings in a performance table before runtime. Each setting corresponds to specific touch patterns or locations detected by the touchscreen controller. When a touch pattern is detected, the system simply retrieves the pre-computed impedance settings from the table and applies them, avoiding complex real-time calculations and reducing processing complexity while maintaining high adaptability.
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 approach enhances antenna efficiency, reduces power consumption, and improves battery life by automatically adjusting impedance settings and selecting the best antenna for improved wireless performance without user input.
Implementation Method 1
End user contact or proximity to an antenna structure tends to impact loading through reactive near field effects, thus degrading impedance matching between the antenna and radio circuitry
Data Source
AI summary
A portable information handling system has plural antennae integrated in a housing proximate a touchscreen display. An antenna controller interfaced with the touchscreen display alters performance settings of the plural antennae, such as impedance tuning settings and selection of one or more antenna as active and/or idle. Touchscreen display touched locations and touch area sizes are associated in a table with predetermined performance settings for lookup by the antenna controller.