Wearable Device Active Passive Antenna Switching
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Solution Overview
Problem
Wearable devices face limitations in battery life due to high energy consumption in active antenna designs and short communication distance in passive antenna designs, making them unsuitable for various applications.
Innovation Solution
A wearable device combining active and passive antenna designs, with a main control chip, switching circuit, secure payment chip, signal gain chip, and both active and passive coils, allowing automatic switching between states based on communication needs and battery level to optimize energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If active antenna design is used with signal gain chip, then communication distance is improved, but energy consumption increases and battery service cycle shortens
Solution Approach 1:
The patent implements dynamic switching between active and passive antenna modes based on real-time communication requirements and battery status. The main control chip receives switching instructions and generates control signals to transition the antenna system between active coil working state (with signal gain chip enabled for long distance) and passive coil working state (without signal gain chip for energy saving), thereby dynamically optimizing the balance between communication distance and energy consumption
Solution Approach 2:
The antenna system is segmented into two distinct operational modes: active antenna mode using the active coil and signal gain chip for extended communication distance, and passive antenna mode using the passive coil for energy-efficient operation. This segmentation allows the system to select the appropriate mode based on specific application scenarios, resolving the contradiction between communication performance and power consumption
2Use of energy by moving object
If passive antenna design is used without signal gain chip, then energy consumption is reduced and battery service cycle is prolonged, but communication distance becomes short
Solution Approach 1:
The wearable device incorporates both active and passive antenna systems, making the antenna subsystem multi-functional. The passive coil provides energy-efficient operation for short-distance communication, while the active coil with signal gain chip provides long-distance communication capability when needed. This universal design allows the same device to adapt to various communication distance requirements without being constrained to a single antenna type
3Reliability
If active antenna design is used, then non-contact application success rate is improved, but battery service cycle shortens
Solution Approach 1:
The system dynamically adjusts between active and passive antenna modes based on switching instructions from mobile devices or automatic detection of battery status. When high reliability for non-contact applications is required, the active antenna mode is activated; when battery conservation is prioritized, the passive antenna mode is used, thereby dynamically balancing application success rate with battery service cycle duration
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 enhances the success rate of non-contact applications and prolongs battery life by dynamically switching between antenna modes, improving communication distance and service time.
Implementation Method 1
Its antenna design mainly has two kinds, one is active antenna design and the other is passive antenna design... The active antenna design is to add a signal gain chip between a secure payment chip and a coil... The passive antenna design is to directly connect the coil with the secure payment chip
Implementation Method 2
The active antenna design is to add a signal gain chip between a secure payment chip and a coil to increase the distance of communication
Data Source
AI summary
A wearable device having a main control chip, a switching circuit, a secure payment chip, a signal gain chip, an active coil and a passive coil. The main control chip receives a switching instruction and generates a control signal according to the switching instruction. The switching circuit generates a switching signal and controls the wearable device to be in an active coil working state or a passive coil working state. The secure payment chip executes a payment operation behavior according to an interactive terminal signal and generating a return signal. The active coil is used for transmitting the amplified return signal to an interactive terminal and transmitting the interactive terminal signal to the signal gain chip. The passive coil is used for transmitting the return signal to an interactive terminal when in the working state and transmitting the interactive terminal signal to the secure payment chip.