RF System Multi-Antenna NSA Mode Signal Routing
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Solution Overview
Problem
Current 4G RF architectures are limited in their ability to simultaneously transmit and receive signals across multiple low bands, particularly in non-standalone (NSA) mode, which restricts the efficiency and versatility of electronic devices.
Innovation Solution
The proposed RF system incorporates a multi-antenna configuration with four antennas, each with distinct configurations for transmission (TX) and reception (RX) across different low bands, utilizing a sophisticated transfer switch module and filtering mechanisms to enable efficient operation in NSA mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-antenna or dual-antenna RF system architecture is used in 4G mobile communication, then the device complexity is reduced, but the ability to simultaneously transmit and receive signals across multiple low bands is limited
Solution Approach 1:
The RF system is segmented into multiple independent TX modules (first TX module for first LB, second TX module for second LB) and RX modules (first RX module for first LB, second RX module for second LB), each handling specific low bands. This segmentation allows simultaneous operation across multiple bands while keeping each module's complexity manageable.
Solution Approach 2:
The transfer switch module serves multiple functions: it routes signals between different TX modules and antennas, connects RX modules to appropriate antennas, and enables both TX and RX operations across multiple low bands. This multi-functionality reduces the need for separate dedicated components for each function.
2Productivity
If multiple antennas are configured for simultaneous TX and RX of multiple low bands, then the communication efficiency and reliability are improved, but the device complexity increases
Solution Approach 1:
The transfer switch module acts as an intermediary that intelligently routes signals between the four antennas and the TX/RX modules. It manages the complex connections by providing a centralized switching mechanism that simplifies signal routing logic while enabling multiple simultaneous communication paths.
Solution Approach 2:
The transfer switch module dynamically routes signals based on operational requirements, switching between different TX and RX paths as needed. This dynamic signal routing allows the system to adaptively allocate antenna resources for simultaneous TX and RX operations across multiple low bands.
3Reliability
If filtering mechanisms are added to enable efficient NSA mode operation, then the signal quality and reliability are improved, but the device complexity increases
Solution Approach 1:
Filtering mechanisms are applied locally at specific points in the signal path where they are most effective - the first filtering module is positioned to filter signals for the first LB, and the selective filtering module filters signals for the second LB. This localized filtering approach improves signal quality for each band without requiring system-wide complex filtering.
Data Source
AI summary
A RF system and an electronic device are provided. The RF system includes an RF transceiver, an RF processing circuit, a transfer switch module, and four antennas. The RF processing circuit includes a first TX module, a second TX module, a first RX module, a second RX module, a first duplexer, a second duplexer, a first multiplexer, and a first filtering module. When the RF system works in a NSA mode, a first antenna is configured for TX of a first LB and PRX of the first LB, a second antenna is configured for TX of a second LB and PRX of the second LB, a third antenna is configured for DRX of the second LB, a fourth antenna is configured for DRX of the first LB, and the first filtering module is configured to filter a band other than the first LB.