Antenna Impedance Matching Using Real-Time Reflection Feedback
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Solution Overview
Problem
Existing electronic devices face challenges in achieving optimal antenna impedance matching due to varying use situations, which affects transmission efficiency, and current methods rely on tuner codes selected from lookup tables without considering real-time changes in reflection coefficients.
Innovation Solution
An electronic device with an antenna tuner, power amplifier, and processor that configures a reference tuner code, identifies the reflection coefficient, calculates a tuner code based on changes, and performs impedance matching, incorporating real-time adjustments to minimize the number of switch and capacitor combinations, and selects an optimal ground code using S parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tuner code is selected from a lookup table based on antenna impedance, then impedance matching can be performed, but optimal impedance matching is difficult to achieve due to various use situations and real-time changes in reflection coefficients
Solution Approach 1:
The patent implements dynamic impedance matching by continuously monitoring reflection coefficients and adjusting tuner codes in real-time based on changing environmental conditions and use situations, rather than relying on static lookup table selections
Solution Approach 2:
The system uses feedback from measured reflection coefficients to dynamically adjust the tuner code selection, creating a closed-loop control system that adapts to varying conditions and maintains optimal impedance matching
2Reliability
If real-time calculation of tuner codes based on reflection coefficients is performed, then optimal impedance matching is achieved, but calculation resources and processing time increase
Solution Approach 1:
The patent performs full real-time calculation only when necessary (when reflection coefficient changes exceed thresholds), otherwise using pre-calculated or previously determined tuner codes, thus balancing accuracy with resource consumption
Solution Approach 2:
The system changes the calculation approach based on operating conditions, using simplified methods when conditions are stable and full calculation when changes are detected, optimizing the balance between accuracy and resource usage
3Device complexity
If the number of switch and capacitor combinations in the antenna tuner is reduced, then device complexity is lowered, but the ability to achieve optimal impedance matching across various situations is limited
Solution Approach 1:
The patent compensates for reduced hardware combinations by dynamically changing operational parameters (tuner code selections) based on reflected coefficient measurements, allowing full impedance matching capability with fewer physical components
Solution Approach 2:
The system replaces additional mechanical/electrical tuner components with intelligent software-based control that calculates optimal tuner codes, substituting hardware complexity with computational capability
Data Source
AI summary
According to various embodiments, an electronic device may include: an antenna, an antenna tuner, a transceiver, a power amplifier electrically connected to the antenna tuner and configured to perform power amplification according to an execution of impedance matching, and at least one processor operatively connected to the transceiver, the antenna tuner, and the power amplifier. The at least one processor may be configured to: configure a reference tuner code for the antenna tuner connected to the antenna in a signal path of the transceiver and identify a reflection coefficient of the antenna, calculate a tuner code of the antenna tuner based on whether the identified reflection coefficient of the antenna has been changed and an operation of at least one component of the antenna tuner, and perform the impedance matching of the antenna.