RF Front-End Module Layout for Low-Loss PA and LNA Paths
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Solution Overview
Problem
Existing radio frequency transceiving front-end modules face challenges in achieving low noise figure and high transmit power without increasing costs, typically requiring expensive semiconductor materials or processes.
Innovation Solution
A low-loss radio frequency transceiving front-end module design that includes PA and LNA paths directly connected to an antenna, with switches in parallel to ground, and uses radio frequency switches to isolate transmitting and receiving paths, reducing insertion loss without additional costs.
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 segments the radio frequency transceiving front-end module into multiple independent paths: a first PA transmitting path and a first LNA receiving path that are directly connected to the antenna without passing through the radio frequency switch. This segmentation allows these critical paths to avoid the insertion loss introduced by the switch, thereby improving noise figure and transmit power performance without requiring expensive specialized materials or processes for the entire module.
2Power
If expensive semiconductor material or process is used to achieve low noise figure and high transmit power, then the transmit power is increased and noise figure is improved, but the cost of the communication terminal increases
Solution Approach 1:
The patent segments the radio frequency transceiving front-end module into multiple independent paths: a first PA transmitting path and a first LNA receiving path that are directly connected to the antenna without passing through the radio frequency switch. This segmentation allows these critical paths to avoid the insertion loss introduced by the switch, thereby improving noise figure and transmit power performance without requiring expensive specialized materials or processes for the entire module.
3Reliability
If radio frequency switch is used to connect PA and LNA paths to antenna, then transmitting and receiving paths can be isolated, but insertion loss occurs degrading noise figure and transmit power
Solution Approach 1:
The patent segments the radio frequency transceiving front-end module into multiple independent paths: a first PA transmitting path and a first LNA receiving path that are directly connected to the antenna without passing through the radio frequency switch. This segmentation allows these critical paths to avoid the insertion loss introduced by the switch, thereby improving noise figure and transmit power performance while maintaining path isolation through alternative switching mechanisms.
Solution Approach 2:
The patent introduces a second switch connected in parallel to ground on the first PA transmitting path and a second switch connected in parallel to ground on the first LNA receiving path. These intermediary switches act as mediators to provide isolation between transmitting and receiving paths when needed, replacing the function of the radio frequency switch for these specific paths and eliminating the associated insertion loss.
4Ease of operation
If radio frequency switch is used to connect PA and LNA paths to antenna, then transmitting and receiving paths can be isolated, but insertion loss occurs reducing transmit power and increasing noise figure
Solution Approach 1:
The patent segments the radio frequency transceiving front-end module into multiple independent paths: a first PA transmitting path and a first LNA receiving path that are directly connected to the antenna without passing through the radio frequency switch. This segmentation allows these critical paths to avoid the insertion loss introduced by the switch, thereby improving noise figure and transmit power performance while maintaining path isolation through alternative switching mechanisms.
Solution Approach 2:
The patent introduces a second switch connected in parallel to ground on the first PA transmitting path and a second switch connected in parallel to ground on the first LNA receiving path. These intermediary switches act as mediators to provide isolation between transmitting and receiving paths when needed, replacing the function of the radio frequency switch for these specific paths and eliminating the associated insertion loss.
Data Source
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.