RF Front-End Circuit Switching for 5G Path Loss Reduction
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Solution Overview
Problem
The existing radio frequency front-end circuit designs for 5G mobile terminals suffer from high path loss and component loss due to long wiring and the use of three-pole three-throw switches, which complicates circuit design and makes it difficult to meet the increased bandwidth requirements of 5G NR systems.
Innovation Solution
The proposed solution involves a radio frequency front-end circuit with a double-pole double-throw switch and changeover switches that allow flexible signal routing between antennas, reducing path loss and component loss by shortening the routing length between circuit components, and incorporating double-pole double-throw switches with low component loss and good isolation to improve both transmission and reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three-pole three-throw switches are used for signal routing, then signal transmission can be achieved, but component loss increases and circuit design complexity increases
Solution Approach 1:
The patent changes the switching mechanism from three-pole three-throw switches to double-pole double-throw switches combined with changeover switches. This parameter change in switch type reduces component loss while maintaining signal transmission capability, directly addressing the contradiction between reliable signal transmission and minimizing energy loss.
2Reliability
If long wiring is used to connect antennas and circuits, then circuit connectivity is achieved, but path loss increases
Solution Approach 1:
The patent segments the signal routing function into multiple stages: double-pole double-throw switches for primary routing and changeover switches for secondary routing. This segmentation allows for optimized local connections that reduce overall wiring length and path loss while maintaining complete circuit connectivity.
3Adaptability or versatility
If three-pole three-throw switches are used, then signal routing is achieved, but circuit design complexity increases
Solution Approach 1:
The patent divides the complex switching function into two simpler components: double-pole double-throw switches for main signal path selection and changeover switches for auxiliary routing. This segmentation reduces circuit design complexity while preserving signal routing versatility through coordinated operation of the switched components.
4Reliability
If conventional switching components are used, then basic signal transmission is achieved, but transmission performance deteriorates at higher frequencies
Solution Approach 1:
The patent changes the electrical parameters of the switching system by using double-pole double-throw switches with optimized characteristics suitable for 5G frequency bands. This parameter optimization reduces bandwidth loss and improves transmission performance at higher frequencies while maintaining reliable signal transmission.
Data Source
AI summary
A radio frequency front-end circuit and a mobile terminal are provided. The circuit includes: a first signal transmitting circuit and a second signal transmitting circuit; a first changeover switch and a second changeover switch; and a first double-pole double-throw switch. The first signal transmitting circuit is closed through the first double-pole double-throw switch and the first changeover switch and transmits a signal through a first antenna or second antenna, or is closed through the first double-pole double-throw switch and the second changeover switch and transmits a signal through a third antenna or fourth antenna. The second signal transmitting circuit is closed through the first double-pole double-throw switch and the first changeover switch and transmits a signal through the first antenna or the second antenna, or is closed through the first double-pole double-throw switch and the second changeover switch and transmits a signal through the third antenna or the fourth antenna.