RF Feedback Path Using Multiplied Frequencies for Antenna Blockage Detection
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Solution Overview
Problem
Electronic devices face challenges in detecting external objects due to signal blockages and malfunctions, particularly when the antenna size decreases and usage increases, leading to difficulties in accurately determining the state of the communication circuit using self-frequency signals.
Innovation Solution
The electronic device employs a method involving a transmission path with an amplifier, a transceiver, and a feedback path to transmit a signal of a specified frequency, obtain both transmission and reflection signals, and determine the device's state based on the phase and magnitude differences, utilizing both the self-frequency and multiplied frequency components for accurate object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is decreased to reduce device size, then the device becomes more compact, but the antenna becomes blocked by external objects more easily
Solution Approach 1:
The patent implements a feedback mechanism where the electronic device transmits a first signal through the antenna and receives a second signal that includes reflection components. By analyzing the characteristics of this reflected signal, the device can detect whether the antenna is blocked by external objects, thereby compensating for the vulnerability introduced by smaller antenna size.
2Device complexity
If self-frequency signals are used for object detection, then the detection process is simple, but the detection accuracy fails when the reflection signal magnitude and phase change
Solution Approach 1:
The patent transmits a first signal at a specific frequency and analyzes the reflected second signal at the same frequency to detect external objects. By monitoring changes in magnitude and phase of the reflected signal at the transmitted frequency, the system can identify objects without requiring complex multi-frequency analysis, thus maintaining simplicity while improving accuracy.
3Device complexity
If the electronic device uses only transmission signal for state determination, then the system is simpler, but it cannot detect blockages or external objects accurately
Solution Approach 1:
The patent introduces a feedback path where the transmitted first signal is monitored and its reflection is received as a second signal. By comparing the characteristics of the transmitted and reflected signals, the device can accurately determine its operational state and detect external objects, compensating for the added complexity with significant improvements in detection capability.
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 enables the electronic device to accurately detect external objects and determine its own state by analyzing the phase and magnitude changes in the reflection signals, improving object identification and state determination, even in cases of blockages or antenna obstruction.
Implementation Method 1
a transmission path electrically connected to the antenna and including at least one amplifier
Implementation Method 2
a transceiver connected to the transmission path and converting a signal
Implementation Method 3
The reflection signal may be entered into the transmission path through an antenna of the electronic device; the electronic device may obtain the entered reflection signal through the feedback path
Data Source
AI summary
An electronic device is provided. The electronic device includes an antenna, a transmission path electrically connected to the antenna and including at least one amplifier, a transceiver connected to the transmission path and converting a signal, a feedback path connected between the transmission path and the transceiver, at least one processor connected to the transceiver and communicating with at least one external electronic device by using the transceiver, and a memory connected to the at least one processor. The processor may obtain first information about a first phase and a first magnitude, which are associated with the first frequency, and second information about a second phase and a second magnitude, which are associated with a multiplied frequency of the first frequency, from the transmission signal and the reflection signal using the transceiver, and may determine a state of the electronic device based on the first information and the second information.