RFI Mitigation Module for High-Speed Data Links
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Solution Overview
Problem
High-speed data links in computing systems, such as USB3, generate broad-band noise that causes significant radio frequency interference (RFI), affecting wireless peripherals and increasing material costs when conventional shielding methods are used.
Innovation Solution
A network of transmission lines and lumped elements, including resistors, inductors, and capacitors, is inserted between the transmitter and receiver to form an RFI mitigation module, reducing RFI by up to 15 dB without compromising signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional shielding methods are used to reduce RFI, then radio frequency interference is reduced, but material costs increase
Solution Approach 1:
The patent extracts the RFI mitigation function from conventional shielding materials and implements it through an electronic circuit (LC filter network) inserted between transmitter and receiver. This replaces physical shielding materials with an electronic solution that achieves the same RFI reduction effect without requiring additional shielding materials.
Solution Approach 2:
The patent substitutes mechanical/physical shielding methods with an electronic circuit solution. Instead of using physical barriers (shielding materials) to block RFI, the invention uses an electronic LC filter network to electrically filter out the interfering frequencies, replacing the mechanical shielding approach with an electronic system.
2Adaptability or versatility
If broadband communication is implemented, then communication capability is improved, but radio frequency interference increases
Solution Approach 1:
The patent introduces an LC filter network as an intermediary component between the transmitter and receiver. This intermediary circuit selectively filters out broadband RFI frequencies while allowing the desired communication signals to pass through, thus mediating between the need for broadband communication and the need to reduce RFI.
Solution Approach 2:
The patent changes the frequency characteristics of the communication signal by using an LC filter network with specific inductance and capacitance values. The filter parameters (L and C values) are selected to create notches at specific RFI frequencies while maintaining passband characteristics for legitimate communication, thus changing the frequency domain parameters to achieve both goals.
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
The RFI mitigation module effectively reduces WiFi interference by 15 dB, relaxing stringent shielding requirements and enhancing radio performance, while maintaining signal integrity.
Implementation Method 1
A capacitor and an inductor may be used to block the RFI, while allowing the data signals to pass through to the receiver
Implementation Method 2
A capacitor and an inductor may be used to block the RFI
Data Source
Figure 1
Figure 2~3
Figure 4A
AI summary
A radio frequency interference (RFI) mitigation module is provided that is coupled to a high speed data link. The RFI mitigation module is to reduce RFI caused by the high speed data link. The RFI mitigation module includes at least one resister, at least one inductor, and at least one capacitor.