RF Front-End Module Layout for Low-Loss Antenna Path Switching
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Solution Overview
Problem
Existing radio frequency transceiving front-end modules face challenges in optimizing noise figure and transmit power while maintaining low production costs, typically requiring expensive semiconductor materials or processes.
Innovation Solution
A low-loss radio frequency transceiving front-end module design that includes parallel switches and connections to an antenna, utilizing switches in parallel with ground to manage paths and reduce insertion losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If expensive semiconductor material or process is used to achieve low noise figure and high transmit power, then the noise figure is improved and transmit power is increased, but the cost of the communication terminal increases
Solution Approach 1:
The patent changes the electrical parameters of existing semiconductor components (PA and LNA) through optimized circuit topology and switching control, achieving low noise figure and high transmit power without changing the fundamental semiconductor material or manufacturing process, thus avoiding cost increase
2Power
If expensive semiconductor material or process is used to achieve low noise figure and high transmit power, then the transmit power is increased, but the cost of the communication terminal increases
Solution Approach 1:
The patent introduces dynamic switching control between direct connection mode (for low loss and high power) and bypass mode (for other operational requirements), allowing the system to adaptively optimize transmit power without incurring additional manufacturing costs from expensive materials or processes
3Adaptability or versatility
If radio frequency switch is used to connect PA transmitting path or LNA receiving path to ANT port, then the circuit can be switched between different paths, but insertion loss occurs which degrades noise figure and reduces transmit power
Solution Approach 1:
The patent extracts the radio frequency switch from the direct signal path between PA/LNA and ANT port, eliminating its insertion loss impact on the critical transmitting and receiving paths, while retaining path switching capability through alternative circuit configuration
Solution Approach 2:
The patent introduces a ground-connected switch as an intermediary element that enables path switching without inserting a lossy radio frequency switch into the direct signal path, thereby maintaining low insertion loss while achieving switching functionality
Data Source
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AI summary
Disclosed in the present invention are a low-loss radio frequency transceiving front-end module and an electronic device. The radio frequency transceiving front-end module comprises at least one PA transmitting path, at least one LNA receiving path, at least one bypass receiving path, and/or at least one bypass transmitting path; the at least one PA transmitting path or the at least one LNA receiving path is directly connected to an ANT port of an antenna, and the PA transmitting path or the LNA receiving path comprises at least one switch connected in parallel to the ground; the remaining PA transmitting path or LNA receiving path is connected to the ANT port of the antenna by means of a radio frequency switch. According to the radio frequency transceiving front-end module provided by the present invention, the noise coefficient of a receiving end and the output power and loss of a transmitting end are optimized by reducing the insertion loss of the radio frequency switch, without increasing the costs.