Multi-band RF Signal Booster Shared Amplification Paths
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Solution Overview
Problem
Current radio frequency (RF) signal boosters face challenges in efficiently boosting signals across multiple frequency bands due to increased crowding in the RF spectrum, leading to issues with spurious and out-of-band emissions, and the need for costly and large sharp band-pass filters.
Innovation Solution
A multi-band RF signal booster design that uses shared amplification paths with band-pass filters to boost both uplink and downlink channels of adjacent frequency bands, reducing the need for separate filters and minimizing undesired emissions by employing SAW or ceramic filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate sharp band-pass filters are used for each frequency band, then signal filtering precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple band-pass filters into a single shared filter structure that handles multiple frequency bands (e.g., Band 12 and Band 13) simultaneously. This shared filter approach reduces the total number of filters needed while maintaining the ability to selectively pass or attenuate specific channels within each band, thereby reducing device complexity without sacrificing filtering precision.
Solution Approach 2:
The patent designs amplification paths and filters that serve multiple functions across different frequency bands. A single amplification path can handle both Band 12 and Band 13 signals, and a shared filter can attenuate or pass channels from multiple bands. This multi-functionality reduces the overall component count and simplifies the device architecture while maintaining effective signal control.
2Reliability
If separate amplification paths are used for each frequency band, then signal amplification quality is improved, but device size and cost increase
Solution Approach 1:
The patent merges amplification functionality into shared amplification paths that can handle multiple frequency bands. Instead of having completely separate amplification chains for Band 12 and Band 13, the system uses shared amplification stages with appropriate filtering to direct signals to the correct amplification path, reducing the overall device size while maintaining amplification quality.
Solution Approach 2:
The patent segments the signal processing function by separating filtering and amplification into distinct stages. Band-pass filters are placed before amplification stages to pre-select the frequency band, allowing subsequent amplification paths to be shared across multiple bands. This segmentation enables more efficient resource utilization and reduces device size.
3Measurement precision
If multiple separate filters are used for adjacent frequency bands, then channel selectivity is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines filtering functions for adjacent frequency bands into shared band-pass filters that can selectively pass or attenuate channels from multiple bands. This shared filter approach reduces the total number of filters required in the system, lowering manufacturing costs while maintaining the ability to achieve precise channel selectivity through proper filter placement and configuration.
Data Source
AI summary
Provided herein are apparatus and methods for radio frequency (RF) signal boosters. In certain implementations, a multi-band signal booster is provided for boosting the uplink and downlink channels of at least a first frequency band and a second frequency band. In certain configurations, the downlink channels of the first and second channels are adjacent, and the signal booster includes a first amplification path for boosting the uplink channel of the first frequency band, a second amplification path for boosting the uplink channel of the second frequency band, and a third amplification path for boosting both downlink channels of the first and second frequency bands.