Inductor Device With Interlaced Sub-Traces And Integrated Capacitor
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Solution Overview
Problem
Conventional methods to address the negative effects of harmonics in RF devices, such as second and third harmonics, often require external filters that affect circuit functionality and incur additional costs.
Innovation Solution
An inductor device with a capacitor and interlaced sub-traces that filters low frequency signals while allowing high frequency signals to pass, eliminating the need for external filters and enhancing signal cancellation between inner and outer wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an external filter is disposed outside the circuit to filter harmonics, then the negative effect of harmonics is reduced, but the circuit functionality is affected and additional costs are incurred
Solution Approach 1:
The patent merges the filter function with the inductor device by integrating a capacitor directly into the inductor structure. The capacitor is coupled between the first and second nodes of the inductor, forming an internal filtering mechanism that eliminates the need for separate external filters while preserving circuit functionality
Solution Approach 2:
The inductor device is designed to perform multiple functions simultaneously: it provides inductance through its trace structure while the integrated capacitor provides filtering capability. This multi-functional design allows the single component to both store energy magnetically and filter harmonics, reducing overall circuit complexity
2Object-affected harmful factors
If an external filter is disposed outside the circuit to filter harmonics, then the negative effect of harmonics is reduced, but additional costs are incurred
Solution Approach 1:
The filter function is merged with the inductor device by integrating a capacitor directly into the inductor structure. The capacitor is coupled between the first and second nodes of the inductor, forming an internal filtering mechanism that eliminates the need for separate external filters and associated costs
3Reliability
If a conventional inductor structure is used, then the operating frequency characteristic is maintained, but low frequency signals cannot be filtered
Solution Approach 1:
The capacitor is strategically placed between specific nodes (first node and second node) of the inductor structure to create a localized filtering effect. This local quality enhancement allows low frequency signals to be filtered at specific points within the inductor while preserving the overall inductance and operating frequency characteristics
Solution Approach 2:
The patent changes the electrical parameters of the inductor device by adding capacitive elements, creating a resonant circuit that selectively filters low frequency signals while maintaining high frequency operation. The capacitor value is chosen to create a resonant frequency that targets the problematic low frequency harmonics
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 inductor device effectively reduces the negative impact of high frequency harmonics on the circuit by amplifying and canceling them internally, improving third-order intermodulation distortion and eliminating the need for external filtering, thereby reducing costs and preserving circuit functionality.
Implementation Method 1
The capacitor of the inductor device brings a function to filter low frequency, such that low frequency signal induced at the inductor device cannot pass but high frequency signal can pass the capacitor directly
Implementation Method 2
the crossing structure of the present disclosure with symmetrical disposition can make the induced signals in the inner wire and the outer wire flow of the traces in an interlaced manner, such that the induced signals in the inner wire and the outer wire can be cancelled
Data Source
AI summary
An inductor device includes a first trace, a second trace, and a capacitor. The first trace includes at least two sub-traces and a first crossing connection portion. One terminal of the at least two sub-traces is coupled to a first node. The first crossing connection portion is coupled between the at least two sub-traces of the first trace in an interlaced manner. The second trace includes at least two sub-traces. One terminal of the at least two sub-traces is coupled at a second node. The capacitor is coupled between the first node and the second node.