RF Front-End Circuit Segmentation for 4x4 MIMO Area Reduction
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Solution Overview
Problem
The design of RF front-end circuits for mobile intelligent terminals is complex and space-intensive due to the need for multiple frequency band support, particularly with LTE downlink 4×4 MIMO and carrier aggregation, which increases the complexity and area requirements, and existing solutions often require unnecessary hardware components to maintain functionality.
Innovation Solution
The implementation of an RF front-end circuit with independent RF circuits for each antenna, each connected to a shared RF transceiver, allowing for separate frequency band operations and carrier aggregation without the need for shared high-cost, large-area components, and a circuit board configuration that allows for flexible assembly of these independent RF circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If shared multi-frequency terminal components are used in RF front-end circuits, then device integration is improved, but device complexity and occupied area increase
Solution Approach 1:
The patent divides the RF front-end circuit into four independent RF circuits (first, second, third, and fourth RF circuits), each corresponding to a separate antenna and frequency band. This segmentation allows each circuit to be optimized independently for its specific frequency band, eliminating the need for complex shared multi-frequency components while maintaining multi-band support capability.
2Adaptability or versatility
If shared multi-frequency terminal components are used in RF front-end circuits, then device integration is improved, but occupied area increases
Solution Approach 1:
By segmenting the RF front-end into four independent single-frequency RF circuits rather than using shared multi-frequency components, the patent reduces the overall occupied area. Each independent circuit can be optimized for its specific frequency, eliminating redundant components and reducing the total area required on the circuit board.
3Device complexity
If independent RF circuits are used for each antenna, then device complexity is reduced, but manufacturing cost increases
Solution Approach 1:
The patent segments the RF front-end into four independent circuits, which simplifies design and debugging but may increase component count. However, this segmentation enables modular manufacturing approaches where identical or similar circuit blocks can be produced using the same processes, potentially offsetting the increased component count through manufacturing efficiency.
Data Source
AI summary
The present disclosure provides an RF front-end circuit and a circuit board thereof, a terminal. The RF front-end circuit may include an RF transceiver and a first RF circuit, a second RF circuit, a third RF circuit and a fourth RF circuit connecting to the RF transceiver respectively. The first RF circuit may be connected to a first antenna. The second RF circuit may be connected to a second antenna. The third RF circuit may be connected to a third antenna. The fourth RF circuit may be connected to a fourth antenna. The first RF circuit, the second RF circuit, the third RF circuit and the fourth RF circuit may be independent from each other.