SAW Filter Signal Splitting for Multi-Band Carrier Amplification
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Solution Overview
Problem
RF electronics face challenges in amplifying aggregated carrier component signals due to significant noise and gain differences among different frequency bands, affecting overall signal quality.
Innovation Solution
A device comprising a filter that separates aggregate signals into sub-signals of different frequency bands, amplified by low noise amplifiers, and interconnected via a switchable passive network to terminate unwanted frequency components, reducing noise and improving gain characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bandpass filters are used to receive aggregated component carriers in different bands, then the device can receive signals across wider frequency bands, but noise and gain differences among different frequency bands increase, affecting signal quality
Solution Approach 1:
The aggregate signal is separated into multiple sub-signals corresponding to different frequency bands using bandpass filters. Each sub-signal is then processed independently through dedicated amplifiers, allowing customized gain control for each band while maintaining overall signal quality
Solution Approach 2:
Different gain characteristics are applied to different frequency bands through separate amplifiers. Each amplifier can be optimized for its specific frequency band, allowing local optimization of signal quality while maintaining adaptability across multiple bands
2Productivity
If signals from different frequency bands are amplified and combined onto a single path, then the device can process aggregated carriers, but significant noise and gain differences are introduced among the different received frequency bands
Solution Approach 1:
The signal path is segmented into multiple independent processing chains, one for each frequency band. Each chain includes its own amplifier with optimized gain characteristics, preventing noise and gain differences from affecting other bands while maintaining overall processing capability
Solution Approach 2:
The system dynamically adjusts gain for each frequency band independently through separate amplifiers. This allows real-time optimization of each band's signal quality while maintaining the ability to process multiple aggregated carriers simultaneously
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces noise and gain inconsistencies, enhancing signal quality by selectively terminating unwanted frequency components and optimizing amplifier performance.
Implementation Method 1
the filter includes a surface acoustic wave (SAW) filter
Data Source
AI summary
A surface acoustic wave (SAW) filter that receives an aggregate circuit and outputs two or more sub-signals on outputs each of a different frequency band. The sub-signals are amplified by low noise amplifiers and, in one implementation, the amplified sub-signals can be summed. The outputs are connected via a switched passive network so that portions of the sub-signals on the outputs that are not in the selected frequency band are at least partially terminated.