Idle-Mode Antenna Impedance Control Using Return Loss Feedback
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Solution Overview
Problem
Tunable antenna-based electronic devices cannot control their impedance during idle modes when not performing data communication with external devices, leading to potential inefficiencies and interference.
Innovation Solution
An electronic device with a communication control module that determines whether to control the communication module based on information related to communication with an external device, estimates changes in resonant frequency using return loss, and adjusts antenna impedance accordingly, even during idle states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the electronic device does not perform data communication with external devices during idle mode, then power consumption is reduced, but impedance control is lost leading to communication quality degradation
Solution Approach 1:
The patent applies preliminary action by performing impedance measurement and adjustment during idle mode before actual data communication begins. The communication control module measures return loss and adjusts the impedance matching circuit in advance, ensuring optimal impedance is established before communication starts, thus preventing communication quality degradation while maintaining power savings during truly idle periods.
Solution Approach 2:
The patent implements feedback by continuously monitoring return loss during idle mode and using this information to dynamically adjust the impedance matching circuit. The communication control module measures the return loss signal, determines impedance status, and controls the impedance matching circuit accordingly, creating a closed-loop feedback system that maintains communication quality without continuous high-power operation.
2Reliability
If the impedance matching circuit is continuously controlled during idle mode, then communication quality is maintained, but power consumption increases
Solution Approach 1:
The patent applies periodic action by performing impedance measurement and adjustment at specific intervals during idle mode rather than continuously. The communication control module measures return loss periodically and adjusts impedance at these periodic intervals, maintaining communication quality while avoiding the power consumption of continuous control operations.
3Adaptability or versatility
If objects with permittivity are in proximity to the antenna, then resonant frequency shifts occur, but impedance matching becomes inaccurate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting impedance matching parameters based on measured return loss. When objects with permittivity are in proximity causing resonant frequency shifts, the communication control module measures the changed return loss characteristics and adjusts the impedance matching circuit parameters accordingly, adapting to environmental changes while maintaining matching accuracy.
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 allows for efficient control of communication modules during idle periods, reducing interference and improving communication quality by dynamically adjusting antenna characteristics based on environmental changes and user interactions.
Implementation Method 1
using a variable capacitor to maintain optimal communication quality
Implementation Method 2
obtain a return loss for the transmitted signal to control an impedance of the impedance matching circuit
Data Source
AI summary
A method for communication in an electronic device is provided. The method includes determining whether to control a communication module of the electronic device based on at least a part of information related to communication between the electronic device and an external device, determining a control value for the communication module based on the determination, and controlling the communication module using at least a part of the control value.