RF FEM Switch Routing for Multi-Band PA Power Sharing
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Solution Overview
Problem
Existing electronic devices face challenges in supporting multiple frequency ranges efficiently, particularly in dual connectivity scenarios, where the number of power supply circuits is high and the structure is complex, limiting antenna flexibility and increasing component size.
Innovation Solution
The electronic device incorporates a plurality of power supply circuits and front-end modules (FEMs) connected to a processor, with a switch that can connect one power supply circuit to multiple power amplifiers, allowing for flexible voltage selection and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power supply circuits are used to support various frequency ranges in dual connectivity, then the electronic device can support EN-DC and multiple frequency bands, but the number of power supply circuits increases and the structure becomes complex
Solution Approach 1:
The switch is configured with multiple paths that can connect different power supply circuits to different power amplifiers based on operating frequency bands. The same switch structure serves multiple functions by dynamically routing power supply connections, allowing a single power supply circuit to serve multiple PAs at different frequencies, thereby reducing the overall number of dedicated power supply circuits needed while maintaining support for various frequency ranges and dual connectivity
2Adaptability or versatility
If multiple power supply circuits are used to support dual connectivity, then various frequency bands can be supported, but the number of components increases and component size increases
Solution Approach 1:
The switch combines multiple power supply circuit paths and multiple power amplifier connections into a single integrated component. By merging the power distribution function into one switch structure with multiple paths, the patent reduces the total number of separate power supply circuits and components needed, thereby decreasing overall component size and volume while maintaining the capability to support multiple frequency bands through dynamic path selection
3Adaptability or versatility
If multiple power supply circuits are used for dual connectivity, then antenna flexibility can be increased, but the structure becomes complex and component count increases
Solution Approach 1:
The switch provides dynamic power supply routing capability where connection paths can be changed based on operating conditions and frequency bands. This dynamic configuration allows the system to adapt power supply connections in real-time, enabling antenna flexibility and frequency band switching without requiring multiple fixed, dedicated power supply circuits. The dynamic nature of the switch reduces structural complexity compared to static multiple power supply configurations
Data Source
AI summary
An electronic device according to various embodiments comprises a first power supply circuit, a second power supply circuit, a switch, a first radio frequency front end (FEM), a second FEM, a third FEM, a fourth FEM, and a processor, wherein, in order to transmit a signal using a third PA in the third FEM or a fourth PA in the fourth FEM operating on the basis of a second voltage provided from the second power supply circuit, on the basis of transmitting a signal using a first PA in the first FEM operating on the basis of a first voltage provided from the first power supply circuit, the processor can electrically connect the third PA and the fourth PA through the second power supply circuit and the switch. Various other embodiments may be possible.