Diversity Receiver Switching Network for Band-Specific Amplifier Control
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Solution Overview
Problem
In wireless communication systems, diversity receive antennas often face challenges in size, cost, and performance due to the need for increased data throughput, particularly when signals from multiple antennas are processed simultaneously, leading to issues with signal attenuation and noise figure across different frequency bands.
Innovation Solution
A receiving system with a plurality of amplifiers and a switching network, controlled by a controller, that enables specific amplifiers and adjusts phase-shift and impedance matching components based on band select signals to optimize signal processing across multiple frequency bands, including the use of multiplexers and tunable components to manage noise and impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple amplifiers are used to process signals from multiple diversity antennas simultaneously, then data throughput is increased, but device complexity and cost increase
Solution Approach 1:
The patent implements dynamic amplifier selection based on band select signals. The controller enables or disables specific amplifiers depending on which frequency band is currently being received, allowing the system to adapt its complexity to actual operational needs rather than maintaining fixed high complexity for all bands simultaneously
Solution Approach 2:
The switching network provides multi-functionality by enabling a single amplifier to serve multiple frequency bands through dynamic activation. The same physical amplifier infrastructure can process signals from different diversity antennas for different bands, reducing the need for dedicated amplifiers for each antenna-band combination
2Adaptability or versatility
If amplifiers are enabled for multiple frequency bands, then adaptability across bands is improved, but noise figure increases
Solution Approach 1:
The system dynamically enables or disables amplifiers based on the currently active frequency band. When a specific band is selected, only the corresponding amplifier is activated, preventing noise from inactive amplifiers from degrading the signal quality while maintaining the ability to adapt to different bands as needed
Solution Approach 2:
The switching network applies local quality control by routing signals through specific amplifiers matched to their corresponding frequency bands. Each amplifier is optimized for its designated band, and the switching network ensures that only the appropriate amplifier processes each signal, preventing noise contamination from mismatched amplifiers
3Reliability
If impedance matching components are added to optimize signal across bands, then performance is improved, but device complexity increases
Solution Approach 1:
The impedance matching components are integrated into the existing switching network and amplifier infrastructure. The same switching fabric that routes signals between antennas and amplifiers also manages impedance matching, eliminating the need for separate dedicated impedance matching networks for each band and reducing overall device complexity
Solution Approach 2:
The patent merges the impedance matching function with the amplifier selection and signal routing functions. The switching network simultaneously performs signal routing, amplifier selection, and impedance matching operations, consolidating multiple functions into a single integrated structure rather than requiring separate components for each function
Data Source
AI summary
Switching network for diversity receivers. In some embodiments, a receiver can include an input node and an output node, and a first amplification path having a first amplifier implemented between the input node and the output node. The receiver can further include a second amplification path having a second amplifier implemented between the input node and the output node. The receiver can further include a switch implemented to selectively couple the first amplification path and the second amplification path.