RF Front-End Modules for MIMO and Carrier Aggregation
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Solution Overview
Problem
Existing radio frequency (RF) front-end systems face challenges in efficiently supporting multi-input multi-output (MIMO) operations and carrier aggregation across various frequency bands, particularly in mid and high bands.
Innovation Solution
The proposed RF front-end system comprises two modules: a first module configured for MIMO receive and mid-band transmit operations, and a second module, a power amplifier integrated duplexer (PAiD) module, configured for transmit and receive operations across mid and high bands. These modules are coupled through signal paths at specific nodes, enabling efficient signal routing and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single module is used for RF front-end operations, then device complexity is reduced, but the ability to support MIMO operations and carrier aggregation across multiple frequency bands is limited
Solution Approach 1:
The first module is designed to perform multiple functions including MIMO receive operations for mid and high bands, and transmit operations for mid bands. The second module similarly handles both transmit and receive operations for mid and high bands, allowing each module to serve multiple purposes across different frequency bands and operational modes
Solution Approach 2:
The RF front-end system is divided into two distinct modules with specialized functions. The first module handles MIMO receive and mid-band transmit operations, while the second module handles transmit and receive operations for both mid and high bands. This segmentation allows each module to be optimized for specific operations while collectively supporting comprehensive multi-band functionality
2Adaptability or versatility
If separate modules are used for different frequency bands and operations, then support for MIMO and carrier aggregation is improved, but device complexity increases
Solution Approach 1:
The first module combines MIMO receive functionality for both mid and high bands with transmit functionality for mid bands into a single integrated unit. The second module combines transmit and receive operations for mid and high bands. This merging reduces the total number of separate components while maintaining the ability to handle multiple frequency bands and operational modes
Data Source
AI summary
A radio frequency front end system can include a first module configured to provide multi-input multi-output (MIMO) receive operations for a first plurality of mid bands and a first plurality of high bands. The first module can be further configured to provide transmit operations for the plurality of mid bands. The first module can include a first node. The radio frequency front end system can include a second module configured to provide transmit and receive operations for a second plurality of mid bands and a second plurality of high bands. The second module can be a power amplifier integrated duplexer (PAiD) module. The second module can include a second node. The first module and the second module can be coupled by a signal path at the first node and the second node, respectively.