RF Gating Circuit Topology for Compact Dual-Channel Switching
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Solution Overview
Problem
Existing switch designs for communication technologies, particularly double-pole double-throw switches, have complex structures that lead to high costs and difficulties in implementing large-scale dual-channel gating in a small volume.
Innovation Solution
A gating apparatus with four main branches, M radio frequency switches, and four ports, where the switches are grounded and connected in specific configurations to enable simple structure and matching, allowing for dual-channel gating with a double-pole double-throw function, bridge function, or single-channel operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a current double-pole double-throw switch with upper-layer microstrip structure, loading capacitor, switch control circuit, intermediate dielectric substrate, and bottom-layer metal floor is used, then the gating function can be implemented, but the structure becomes complex and costs increase
Solution Approach 1:
The patent extracts and removes unnecessary components from the traditional switch structure. Specifically, it eliminates the intermediate dielectric substrate, bottom-layer metal floor, loading capacitor, and complex control circuit, retaining only the essential upper-layer microstrip structure and switching diodes, thereby simplifying the overall structure while preserving the gating function
Solution Approach 2:
The patent replaces expensive and complex components with simpler, more cost-effective alternatives. The traditional complex switch structure is replaced with a simplified design using basic transmission lines and switching diodes, reducing manufacturing costs and complexity while maintaining functionality
2Reliability
If a current double-pole double-throw switch with complex structure is used, then the gating function can be implemented, but it is difficult to implement large-scale application in a small volume
Solution Approach 1:
The patent removes bulky components such as the intermediate dielectric substrate, bottom-layer metal floor, and loading capacitor, significantly reducing the device volume. This extraction of non-essential elements enables compact integration and large-scale application in small volumes
Solution Approach 2:
The patent merges multiple functions into a single integrated structure. The upper-layer microstrip structure performs both signal transmission and switching functions, eliminating the need for separate components and reducing overall device volume for large-scale applications
Data Source
AI summary
Embodiments of this application disclose a gating apparatus and a gating method, to implement a gating function in a simple structure and matching form. In this application, an example gating apparatus includes four main branches, M loading branches, M radio frequency switches, and four ports. The M radio frequency switches are all grounded, and M is equal to 2 or 4. The four main branches are sequentially connected end to end, and one of the four ports is disposed at a junction of any two connected main branches in the four main branches. When M is equal to 4, each of the four main branches is connected to one of the four loading branches, and each loading branch is connected to one of the M radio frequency switches.