RF Circuit Antenna Switching LTE NR Conflict
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Solution Overview
Problem
In 5G communication systems, particularly in non-standalone (NSA) mode, there is a conflict between LTE and NR frequency bands when switching antennas, leading to deteriorated communication quality due to competing transmission channels.
Innovation Solution
A radio frequency circuit with a switch module and processing module that allows simultaneous transmission of signals from both LTE and NR networks through the same antenna, using a combining unit to combine and transmit signals during antenna switching periods, thereby avoiding conflicts and improving communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antenna switching is performed between LTE and NR frequency bands, then communication flexibility is improved, but signal interference and communication quality deteriorate due to channel conflicts
Solution Approach 1:
A switch module is introduced as an intermediary component between the radio frequency transceiver and the antenna. This switch module selectively connects different frequency bands (LTE and NR) to the antenna at different time slots, acting as a mediator that prevents direct conflict between the two frequency bands while enabling flexible antenna switching. The switch module resolves the channel conflict by ensuring that only one frequency band transmits through the antenna at any given moment.
2Adaptability or versatility
If simultaneous transmission of LTE and NR signals is enabled, then communication capability is improved, but device complexity increases due to additional switching control mechanisms
Solution Approach 1:
The switch module is configured to dynamically adjust its connection state based on transmission requirements. It can switch between connecting LTE signals and NR signals to the antenna according to time slot allocation, enabling the system to adapt to different communication scenarios. This dynamic switching mechanism allows simultaneous support for both LTE and NR transmissions while managing complexity through automated control based on pre-configured time slot patterns.
Data Source
AI summary
A radio frequency circuit includes a radio frequency front-end module, a switch module and an antenna module. The radio frequency front-end module includes a radio frequency transceiver and a first processing module connected to the radio frequency transceiver, the antenna module includes an antenna for receiving or transmitting a radio frequency signal, and the first processing module is configured to transmit a signal of a first network and a signal of a second network.