Antenna Line Switching Circuit for Multi-Protocol IoT Interference
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Solution Overview
Problem
Existing IoT devices often use a single antenna for multiple wireless communication protocols, such as WLAN and Bluetooth, which can lead to inefficient antenna management and interference, affecting the proper functioning of these protocols.
Innovation Solution
An electronic device with a line switching circuit and two communication chips of different types, where the line switching circuit switches the antenna between the chips based on packet distribution signals, ensuring that only one chip uses the antenna at a time, allowing for effective sharing and management of the antenna resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single antenna is used for multiple wireless communication protocols, then device volume is reduced and cost is lowered, but antenna management efficiency deteriorates and interference between protocols increases
Solution Approach 1:
The patent implements dynamic antenna allocation by introducing a packet distribution signal that enables the antenna to be dynamically assigned to different communication chips based on real-time protocol requirements. The antenna switching circuit responds to slot allocation signals from the first communication chip and packet distribution signals from the second communication chip, creating a dynamic sharing mechanism that resolves the contradiction between single-antenna simplicity and multi-protocol efficiency
2Device complexity
If a single antenna is shared among multiple communication chips, then device complexity is reduced, but signal interference between protocols increases
Solution Approach 1:
The patent employs periodic time-slot-based antenna allocation where the first communication chip transmits slot allocation signals that define time windows for antenna usage. The second communication chip receives packet distribution signals that synchronize its transmissions to occur only during allocated time slots, creating a periodic sharing pattern that eliminates simultaneous transmissions and thus prevents signal interference while maintaining low device complexity
Solution Approach 2:
The system implements feedback mechanisms where the first communication chip monitors antenna usage and sends slot allocation signals to control the switching circuit. The second communication chip also provides feedback through packet distribution signals that indicate its transmission requirements. This bidirectional feedback enables coordinated antenna sharing that prevents interference while maintaining system simplicity
Data Source
AI summary
An electronic device, an antenna control method, and a communication chip are provided. The electronic device includes an antenna, a line switching circuit, a first communication chip, and a second communication chip. The line switching circuit is coupled to the antenna. The first communication chip is coupled to the antenna through the line switching circuit and configured to generate a slot allocation signal. The second communication chip is coupled to the antenna through the line switching circuit and configured to generate a packet distribution signal. The first communication chip and the second communication chip are communication chips of different types. The line switching circuit switches the antenna to the first communication chip or the second communication chip according to the packet distribution signal.