Transceiver Impedance Matching for Echo Signal Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In communication systems, transceiver devices often generate echo signals due to impedance mismatches between the transmission line and transceivers, leading to interference noise, especially with larger impedance differences.
Innovation Solution
A transceiver device with an adjustable impedance unit and power unit that selects default impedance and power settings based on a matching mode signal, using a receiving module to determine impedance matching with the load and adjust accordingly to prevent echo signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the transceiver device uses a fixed impedance setting, then the device complexity is reduced, but the echo signal magnitude increases due to impedance mismatch with the load
Solution Approach 1:
The patent implements dynamic impedance adjustment by providing multiple candidate impedances (e.g., 50Ω, 75Ω, 100Ω) and selecting the appropriate impedance based on the load characteristics. The control unit changes the impedance setting during operation to match the load impedance, thereby reducing echo signals while maintaining manageable device complexity through automated selection.
Solution Approach 2:
The patent changes the impedance parameter from a fixed value to a selectable variable with multiple discrete options. By providing a plurality of candidate impedances and allowing the control unit to select among them based on load matching requirements, the system optimizes signal transmission while preventing excessive echo generation.
2Object-generated harmful factors
If the transceiver device adjusts impedance to match the load, then the echo signal is reduced, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent implements self-service through automatic impedance matching where the control unit autonomously selects the appropriate impedance from candidate values based on detecting load characteristics. This automated process eliminates the need for manual impedance setting and reduces the burden on external control systems, thereby limiting device complexity growth while achieving effective echo reduction.
Solution Approach 2:
The patent incorporates feedback mechanisms where the control unit detects load characteristics (such as through current detection or voltage measurement) and uses this information to select the appropriate impedance setting. This closed-loop approach ensures optimal impedance matching while keeping the control mechanism manageable through systematic feedback processing.
3Adaptability or versatility
If the transceiver device uses multiple candidate impedances and powers, then the adaptability to different loads is improved, but the device complexity increases
Solution Approach 1:
The patent achieves universality by designing the transceiver device to handle multiple load types through a unified control mechanism. The control unit can select from multiple candidate impedances and corresponding power levels to accommodate different load characteristics (resistive, capacitive, inductive), making the device adaptable to various applications without requiring separate configurations for each load type.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple candidate impedances and their corresponding power levels before operation. This preparation allows the control unit to quickly select the appropriate combination based on detected load characteristics, avoiding complex real-time calculations and simplifying the control process while maintaining high adaptability.
4Ease of operation
If the transceiver device maintains output power within a fixed range during impedance adjustment, then the ease of operation is improved, but the power delivery to the load may be suboptimal
Solution Approach 1:
The patent changes the power parameter from a variable to a controlled range by associating each candidate impedance with a specific power level or power range. This approach simplifies power management by providing predetermined power settings that work well with each impedance option, making the device easier to operate while maintaining acceptable power delivery efficiency through the coordinated impedance-power selection.
Data Source
AI summary
A transceiver device and an impedance matching method are provided. In the impedance matching method, a plurality of matching modes is set. Each matching mode includes a default impedance and a corresponding default power. In addition, one of the matching modes is selected for outputting a transmission signal to a load. Besides, a response signal derived from the transmission signal is received. Further, whether the default impedance is matched with an impedance of the load or not is determined according to a parameter of the response signal. Thereby, the echo signal can be restrained from being generated.