Reconfigurable RF Front-End Routing for Carrier Aggregation
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Solution Overview
Problem
The complexity of radio-frequency (RF) front-end designs increases significantly in communication systems and devices due to the need for multi-band carrier aggregation, leading to redundant design requirements and increased complexity with each carrier aggregation mode, as traditional approaches necessitate the addition of multiple duplexers or multiplexers for each band combination.
Innovation Solution
A front-end system with a reconfigurable routing circuit and filter-based assemblies that allow the reuse of integrated filters across different carrier aggregation modes, eliminating the need for additional duplexers or quadplexers by utilizing existing filters for multiple band combinations, such as reusing a B3 duplexer for both B1+B3 and B3+B32 modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional approaches are used for multi-band carrier aggregation, then band coverage and throughput are improved, but device complexity increases significantly
Solution Approach 1:
The patent implements multi-functionality by enabling a single duplexer (e.g., B3 duplexer) to serve multiple carrier aggregation modes (B1+B3 and B3+B32) through reconfigurable routing circuits. This allows one component to perform multiple functions that would traditionally require separate duplexers for each band combination, thereby reducing overall system complexity while maintaining broad band coverage.
Solution Approach 2:
The patent employs reconfigurable routing circuits that can dynamically switch signal paths based on the active carrier aggregation mode. The routing circuit adapts its configuration to connect different filters and duplexers to the antenna node depending on whether B1+B3 or B3+B32 mode is active, enabling flexible adaptation to different operational requirements without permanent complex wiring.
2Adaptability or versatility
If multiple duplexers or multiplexers are added for each band combination, then carrier aggregation capability is improved, but design redundancy increases
Solution Approach 1:
The patent eliminates design redundancy by making existing duplexers universal across multiple carrier aggregation modes. The B3 duplexer, for example, is configured to operate in both B1+B3 and B3+B32 modes through the reconfigurable routing circuit, removing the need for separate duplexers for each mode and thereby reducing component count and design complexity.
Solution Approach 2:
The patent merges the functionality of multiple duplexers into a single shared duplexer resource by using the reconfigurable routing circuit to switch between different filter-based assemblies. This combining approach allows the system to achieve multiple carrier aggregation capabilities while using fewer physical components, directly reducing design redundancy.
Data Source
AI summary
In some embodiments, a front-end system can include a switch network that includes an antenna node, a first signal node connectable to a first filter-based assembly for a first band, a second signal node connectable to a second filter-based assembly for a second band, and a third signal node connectable to a third filter-based assembly for a third band. The switch network can be configured to support carrier aggregation of at least the first and second bands. The front-end system can further include a reconfigurable routing circuit configured to allow carrier aggregation of the third band and a selected one of the first and second bands utilizing the third filter-based assembly and the filter-based assembly associated with the selected one of the first and second bands.