Double Ring Inductor Interlaced Traces Symmetry Bandwidth
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Solution Overview
Problem
Existing inductors, such as spiral and twin inductors, face challenges in achieving symmetric structure design and have limited application bandwidth, which restricts their operational range and quality factor.
Innovation Solution
The inductor device features a double ring inductor coupled to two traces in an interlaced manner, enhancing symmetry and inductance, and shifting the self-resonant frequency to a higher range, thereby improving the operational range and quality factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spiral inductor structure is used, then the Q value is improved, but the mutual inductance increases and application bandwidth is limited
Solution Approach 1:
The inductor structure is divided into multiple separate winding sections (first winding section, second winding section, third winding section) arranged in a specific geometric pattern. This segmentation allows each section to contribute to the overall inductance while maintaining electrical isolation that prevents excessive mutual inductance, thereby achieving high Q value with broader bandwidth applicability
Solution Approach 2:
The inductor transitions from a planar spiral configuration to a multi-dimensional geometric arrangement where windings are distributed across different spatial regions. This dimensional change reduces parasitic effects and mutual inductance while preserving the high Q value characteristic, enabling wider frequency operation
2Reliability
If a twin inductor structure is used, then the inductance is increased, but the symmetric structure design becomes difficult and application bandwidth is limited
Solution Approach 1:
The patent employs asymmetric winding arrangements within an overall symmetric layout. The first, second, and third winding sections have different configurations and positions, creating local asymmetries that simplify manufacturing while maintaining global symmetry for balanced electrical characteristics. This approach achieves high inductance with relaxed symmetric design constraints
Solution Approach 2:
The multi-section winding structure serves multiple functions simultaneously: it provides high inductance through series connection, maintains symmetry for balanced performance, and offers design flexibility for easier manufacturing. Each winding section contributes to both inductance generation and structural symmetry, reducing overall device complexity
3Ease of manufacture
If conventional inductor structures are used, then the manufacturing is simplified, but the self-resonant frequency is limited and operation range is restricted
Solution Approach 1:
The patent modifies key geometric parameters of the inductor structure, including winding dimensions, spacing, and arrangement patterns. These parameter changes increase the self-resonant frequency by reducing parasitic capacitance while maintaining manufacturability through standard fabrication processes. The optimized parameters enable extended operation range without complicating manufacturing
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 design achieves a higher self-resonant frequency and enhanced quality factor, expanding the operational range and improving the inductor's performance.
Implementation Method 1
The double ring inductor is respectively coupled to the first trace and the second trace in an interlaced manner
Data Source
AI summary
An inductor device includes a first trace, a second trace, and a double ring inductor. The first trace is disposed at a first area. The second trace is disposed at a second area. The double ring inductor is located at an outside of the first trace and the second trace. The double ring inductor is respectively coupled to the first trace and the second trace in an interlaced manner.