Low-Noise Amplifier Input Attenuation for Satellite Signal Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing low-noise amplification devices in satellite communication systems fail to effectively control signal strength received by low-noise amplifiers, leading to performance deterioration when signal strength is excessive.
Innovation Solution
A low-noise amplification device comprising a variable-power attenuation unit, a low-noise amplification unit, and a signal control unit that adjusts attenuation based on signal strength, using feedback or feedforward control to prevent excessive signal input to the low-noise amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a low-noise amplifier receives a signal of excessive strength, then the amplifier can process strong signals, but the amplifier performance deteriorates
Solution Approach 1:
The patent applies preliminary action by determining the signal strength before the low-noise amplifier processes the signal. The excessive input determining circuit evaluates the reception signal strength in advance, and if excessive, the flow path switching circuit redirects the signal through an attenuation circuit before it reaches the amplifier, preventing performance deterioration from the outset
Solution Approach 2:
The patent implements feedback by continuously monitoring the reception signal strength and using this information to control the flow path switching. The excessive input determining circuit provides feedback about signal strength conditions to the flow path switching circuit, enabling dynamic adjustment of the signal path based on real-time signal conditions
2Productivity
If the signal strength received by the low-noise amplifier is not controlled, then the amplifier can operate at full capacity, but the amplifier performance deteriorates when signal strength is excessive
Solution Approach 1:
The patent applies dynamics by making the signal flow path adjustable rather than fixed. The flow path switching circuit can dynamically change the signal path based on signal strength conditions, switching between a direct path (for normal signal levels) and an attenuation path (for excessive signal levels), enabling the system to adapt to varying input conditions while protecting amplifier performance
3Reliability
If a flow path switching circuit is used to protect the low-noise amplifier, then the amplifier is protected from excessive signals, but control of the signal strength received by the amplifier is not achieved
Solution Approach 1:
The patent introduces an intermediary element - the attenuation circuit - between the signal source and the low-noise amplifier. When the signal strength is determined to be excessive, the flow path switching circuit routes the signal through this intermediary attenuation circuit, which provides controlled signal strength reduction. This intermediary component enables both protection of the amplifier and precise control of the signal strength entering the amplifier
Data Source
AI summary
Strength of a signal received by a low-noise amplifier is controlled depending on strength of a reception signal emitted to a communication satellite by a mobile terminal. A low-noise amplification device provided in the communication satellite comprises: a variable-power attenuation unit which generates an attenuation signal by attenuating the reception signal received in the communication satellite; a low-noise amplification unit which generates an amplification signal by amplifying the attenuation signal with low noise; and a signal control unit which outputs a control signal to the variable-power attenuation unit depending on the attenuation signal, and then adjusts an attenuation of the variable-power attenuation unit.