Multi-Port RF Connection Circuit With Impedance Gating for Low Insertion Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of increasing radio frequency channels in terminal devices is compounded by limited space, leading to complex switching scenarios and higher insertion loss and power consumption due to the use of multiple switches or switches with more ports.
Innovation Solution
A multi-port connection circuit design that utilizes impedance matching and high-impedance states in branch and common transmission lines to gate signals without additional switches, simplifying the circuit structure and reducing insertion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of switches or switches with more ports is increased to satisfy complex switching scenes, then the switching capability is improved, but the insertion loss and power consumption increase
Solution Approach 1:
The patent combines multiple switching functions into a single switch by using a single-pole multi-throw configuration. The switch integrates multiple transmission lines (first transmission line, second transmission line, third transmission line) that share a common first end, allowing one switch to handle multiple frequency bands and antenna switching scenarios simultaneously, thereby reducing the total number of switches needed in the system
Solution Approach 2:
The switch is designed with multi-functional capability to handle different frequency bands (first frequency band, second frequency band, third frequency band) and different antenna switching scenarios (TAS service, CA service) through a single device. The switch can connect the common first end to different second ends based on control signals, providing universal switching functionality across multiple applications
2Adaptability or versatility
If the number of switches or switches with more ports is increased to satisfy complex switching scenes, then the switching capability is improved, but the power consumption increases
Solution Approach 1:
The patent combines multiple switching functions into a single switch by using a single-pole multi-throw configuration. The switch integrates multiple transmission lines (first transmission line, second transmission line, third transmission line) that share a common first end, allowing one switch to handle multiple frequency bands and antenna switching scenarios simultaneously, thereby reducing the total number of switches needed in the system
Solution Approach 2:
The switch is designed with multi-functional capability to handle different frequency bands (first frequency band, second frequency band, third frequency band) and different antenna switching scenarios (TAS service, CA service) through a single device. The switch can connect the common first end to different second ends based on control signals, providing universal switching functionality across multiple applications
3Adaptability or versatility
If more radio frequency channels are added to expand frequency band, then the frequency band coverage is improved, but the circuit complexity increases
Solution Approach 1:
The patent segments the transmission paths into multiple independent transmission lines (first transmission line for first frequency band, second transmission line for second frequency band, third transmission line for third frequency band), each optimized for specific frequency ranges. This segmentation allows each line to be independently controlled and optimized, reducing the overall circuit complexity while maintaining broad frequency coverage
Solution Approach 2:
The patent adds a frequency band dimension to the switching capability by incorporating transmission lines designed for different frequency ranges (first, second, and third frequency bands). This dimensional expansion allows the system to handle multiple frequency bands simultaneously through a unified switching architecture, increasing adaptability without proportionally increasing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces insertion loss and power consumption while enhancing transmission performance and expanding the use scenario for terminal devices, supporting multiple frequency bands and antennas without increasing physical complexity or cost.
Implementation Method 1
the first end of the first switch and a second end of the first common transmission line are in an impedance matching state in a first frequency band
Implementation Method 2
the first end of the second switch is in a high-impedance state in the first frequency band
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
The disclosure relates to the technical field of radio frequency circuits, and provides a multi-port connection circuit, a radio frequency front-end module, and an electronic device. The multi-port connection circuit includes: a first switch, a second switch, a first branch transmission line, a second branch transmission line, and a first common transmission line. A first end of the first switch and a second end of the first switch are two ends that are capable of being connected. A first end of the second switch and a second end of the second switch are two ends that are capable of being connected. The second end of the first switch is connected to a first end of the first branch transmission line. The second end of the second switch is connected to a first end of the second branch transmission line. A second end of the first branch transmission line and a second end of the second branch transmission line are both directly connected to a first end of the first common transmission line. The circuit can reduce insertion loss on a signal path.