Signal Transceiving Module Antenna Coupling Detection Circuit
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Solution Overview
Problem
In wireless communication systems, incorrect coupling of an antenna to the main circuit can lead to incomplete or failed signal transmission and potential power amplifier damage due to reflected signals.
Innovation Solution
A signal transceiving module with a processing circuit that detects signal quality and power differences to determine correct antenna coupling, controlling the power amplifying circuit to prevent damage by stopping or limiting signal transmission when coupling is incorrect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is externally coupled to the main circuit of the wireless transceiver, then the signal transmission and reception function is achieved, but the power amplifier may be damaged due to reflected signals when the antenna coupling is incorrect
Solution Approach 1:
The system performs preliminary detection of antenna coupling correctness before enabling normal transmission operations. The detection circuit checks the coupling state in advance, and only when correct does it allow the power amplifier to operate at full power, thereby preventing reflected signal damage
Solution Approach 2:
The detection circuit continuously monitors the antenna coupling state and provides feedback to the control circuit. Based on this feedback, the control circuit adjusts the power amplifier operation accordingly - reducing or disabling power output when incorrect coupling is detected, thus protecting the power amplifier from damage
2Measurement precision
If the antenna is not coupled correctly to the main circuit, then manufacturing defects or assembly errors occur, but the system cannot reliably determine the coupling status without additional detection mechanisms
Solution Approach 1:
The system uses its own existing signal transmission path to perform self-detection of antenna coupling status. The detection circuit sends test signals through the antenna and measures the reflected or transmitted signal characteristics, allowing the system to automatically determine coupling correctness without external testing equipment
Solution Approach 2:
The detection circuit acts as an intermediary between the power amplifier and the antenna. It inserts a detection function that can measure coupling status by analyzing signal characteristics, thereby enabling accurate determination of antenna coupling state with minimal additional complexity
Data Source
AI summary
A signal transceiving module includes: a first antenna; a first signal port; and a first processing circuit coupled to the first signal port and arranged to detect a first signal quality of a first received signal received from the first signal port and determine if the first antenna is coupled to the first signal port correctly according to at least the first signal quality.