Multiway Switch for 5G SRS Transmission via Segmented SPDT Modules
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Solution Overview
Problem
Current 5G NR radio frequency systems face challenges in efficiently transmitting sounding reference signals (SRS) through multiple antennas, leading to increased link loss and suboptimal data transmission performance due to complex switch configurations.
Innovation Solution
A multiway switch with 6 T ports and 2n P ports is integrated into the radio frequency circuit and antenna system, where two T ports are fully coupled with all P ports, reducing the number of series switches and optimizing transmission and reception performance by enabling efficient SRS transmission through 2n antennas corresponding to 2n P ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex switch configurations are used to transmit SRS through multiple antennas, then antenna selection capability is improved, but link loss increases and transmission performance deteriorates
Solution Approach 1:
The switch network is segmented into multiple independent single-pole double-throw (SPDT) switch modules instead of using a single complex multiway switch. Each SPDT module handles a specific antenna pair, reducing the overall path loss by minimizing the number of series switches in the signal path while maintaining the ability to select among multiple antennas for SRS transmission
Solution Approach 2:
The patent transitions from a traditional single-frequency single-transmit architecture to a single-frequency dual-transmit mode, adding a dimensional aspect to the transmission capability. This allows two independent transmit paths to operate simultaneously, improving adaptability for MIMO operations while keeping each individual path simple to reduce loss
2Adaptability or versatility
If multiple series switches are used in the RF circuit, then antenna switching flexibility is improved, but path loss increases
Solution Approach 1:
The complex multiway switch is divided into multiple independent SPDT switch modules. Each module contains only one or two switches, minimizing the number of series switches in any given signal path. This segmentation maintains antenna switching flexibility through coordinated control of multiple modules while reducing cumulative path loss
Solution Approach 2:
Multiple antenna ports are merged into pairs, with each SPDT module handling a pair of antennas. The modules are then combined through coordinated switching to achieve the equivalent functionality of a complex multiway switch, but with fewer switches in series for any individual signal path, thereby reducing path loss
3Loss of energy
If a simplified switch configuration is used, then path loss is reduced, but the number of antennas that can be coupled is limited
Solution Approach 1:
Each SPDT switch module is designed to be universal, capable of coupling any antenna pair to the RF circuit. Through coordinated control of multiple identical modules, the system can couple any combination of antennas, achieving full adaptability for 2n antennas while keeping each module simple with minimal switches
Solution Approach 2:
The switch configuration is made dynamic through coordinated control of multiple SPDT modules. The switching states of different modules are dynamically adjusted based on which antennas need to be coupled, allowing the system to adapt to different antenna selection scenarios while maintaining simple, low-loss individual module designs
Data Source
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AI summary
A multiway switch, a radio frequency system, and an electronic device are provided. The multiway switch is applicable to an electronic device being operable in a single-frequency dual-transmit mode. The electronic device includes the multiway switch, a radio frequency circuit, and an antenna system. The antenna system includes 2n antennas. The multiway switch includes six T ports and 2n P ports. The six T ports are configured to be coupled with the radio frequency circuit. The 2n P ports are configured to be coupled with the antenna system. The six T ports include two first T ports coupled with all of the 2n P ports. The multiway switch is configured to be coupled with the radio frequency circuit and the antenna system to implement a preset function of transmitting a sounding reference signal (SRS) through the 2n antennas corresponding to the 2n P ports in turn.