Multi-common port multiband filters for signal booster architectures
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Solution Overview
Problem
Current signal boosters for wireless communication face challenges in efficiently amplifying and filtering uplink and downlink signals across multiple frequency bands, leading to complex and costly architectures with high component counts, which can result in reduced reliability and increased costs.
Innovation Solution
The use of single-input, single-output (SISO) and double-input, single-output (DISO) multiband filters in conjunction with diplexers and amplifiers to separate and amplify uplink and downlink signals, allowing for shared components and simplified architectures, thereby reducing complexity and cost while maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional separate filtering and amplification paths are used for each frequency band, then signal quality can be maintained, but device complexity and component count increase significantly
Solution Approach 1:
The patent combines multiple bandpass filters for different frequency bands into a single integrated filter structure with shared components. Specifically, filters for first and second frequency bands share common inductors and capacitors, reducing the total component count while maintaining the ability to selectively filter different bands through switching mechanisms.
Solution Approach 2:
The patent implements universal components that serve multiple functions across different frequency bands. The shared inductors and capacitors can be used in different filter configurations depending on which frequency band is active, making each component multi-functional rather than dedicated to a single band.
2Reliability
If multiple separate amplifiers are used for different frequency bands, then amplification performance can be optimized per band, but cost and device complexity increase
Solution Approach 1:
The patent employs dynamic switching between different filter and amplification paths based on the active frequency band. Switches dynamically connect different components into the signal path, allowing a single amplifier to serve multiple bands at different times, thereby reducing the number of amplifiers needed while maintaining optimal performance for each band.
Solution Approach 2:
The patent pre-configures multiple filter paths and switching arrangements in advance, so that when a particular frequency band becomes active, the appropriate filter and amplification path is already prepared and can be quickly engaged without requiring separate dedicated amplifiers for each band.
3Adaptability or versatility
If more filters and components are added to handle multiple frequency bands, then multi-band capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple filter functions into a single integrated structure where components like inductors and capacitors serve multiple frequency bands simultaneously. This consolidation reduces the total number of components that need to be manufactured, assembled, and tested, thereby lowering manufacturing costs while maintaining multi-band capability.
4Measurement precision
If separate signal paths are used for each frequency band, then filtering precision can be maintained, but signal processing time and system complexity increase
Solution Approach 1:
The patent uses dynamic switching to rapidly reconfigure the filter path based on the input signal's frequency band. This allows the system to maintain precise filtering for the active band while quickly adapting to band changes, avoiding the time penalty of having multiple separate fixed paths and reducing the overall signal processing delay.
Data Source
AI summary
A technology for a dual-common port multi-bandpass filter is described. The dual-common port multi-bandpass filter can include two or more analog filters. The dual-common port multi-bandpass filter can include a first common port coupled to an input of each of the two or more analog filters, where each analog filter can be configured to filter one or more frequency bands. The dual-common port multi-bandpass filter can include a second common port coupled to an output of each of the two or more analog filters. Each input of each of the two or more analog filters can be impedance matched with the first common port. Each output of each of the two or more analog filters can be impedance matched with the second common port.