RF Module Leakage Detection for Multi-Band Signal Compensation
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Solution Overview
Problem
In radio frequency modules with multiple paths, signal leakage between frequency bands leads to loss and noise, complicating the compensation process and potentially degrading communication accuracy.
Innovation Solution
A detection circuit is placed on one path to detect leakage signals from a different frequency band, allowing for indirect detection and minimizing interference with the main signal, thereby controlling amplifier circuits to compensate for signal leakage without affecting the primary signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection circuit is provided in one path to detect signal level changes for compensating loss due to signal leakage, then communication accuracy is improved, but loss and noise may occur in the main signal of that path
Solution Approach 1:
The patent uses the leakage signal itself as an intermediary to detect signal level changes. Instead of directly detecting the main signal in one path (which would cause loss and noise), the detection circuit detects the leaked signal that has entered from another path. This intermediary approach allows indirect measurement of signal level without interfering with the main signal path, thereby resolving the contradiction between improving communication accuracy and avoiding signal loss.
2Adaptability or versatility
If multiple paths with different frequency bands are commonly connected on the antenna side, then multi-band transmission and reception are supported, but signal leakage between paths occurs
Solution Approach 1:
The patent implements a feedback mechanism where detection circuits in each path detect signal level changes caused by leakage from other paths, and amplifier circuits adjust their gain accordingly to compensate for the loss. This feedback loop continuously monitors and corrects the harmful effect of signal leakage, allowing the system to maintain both multi-band capability and signal integrity by dynamically responding to leakage conditions.
Data Source
AI summary
A radio frequency module includes a filter that is arranged on a first path connecting a common terminal and a first input/output terminal and has a first frequency band as a pass band, another filter that is arranged on a second path connecting the common terminal and a second input/output terminal and has a second frequency band different from the first frequency band as a pass band, and a detection circuit connected to the first path and configured to detect a leakage signal in the second frequency band leaked to the first path and output a signal indicating a detection result.