Integrated Capacitor Plate Choke Module for High-Frequency Noise Attenuation
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Solution Overview
Problem
Existing choke modules face diminished noise attenuation in high frequency ranges due to parasitic capacitance effects, which increase with the number of winding turns, limiting their effectiveness in frequencies from 10 MHz to 1000 MHz.
Innovation Solution
A choke module with an integrated capacitor plate that includes a magnetic core and windings, where the capacitor plate has electrode layers and a dielectric layer, allowing for improved noise attenuation in high frequency ranges without increasing the module's lateral dimensions, and enabling miniaturization by replacing a conventional support plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete capacitors are used to improve high frequency attenuation, then high frequency noise reduction is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the capacitor function directly into the choke structure by forming electrode layers on the core. This integration eliminates the need for separate discrete capacitor components and their associated mounting, wiring, and spacing requirements, thereby reducing device complexity while maintaining high frequency attenuation performance.
Solution Approach 2:
The core structure serves multiple functions simultaneously: it acts as the magnetic core for the choke windings and also supports the capacitor electrode layers. This multi-functionality reduces the overall component count and simplifies the module structure while achieving both low and high frequency noise attenuation.
2Reliability
If discrete capacitors are mounted on a printed circuit board next to the choke, then high frequency damping is improved, but the overall module size and lateral dimensions increase
Solution Approach 1:
The patent merges the capacitor structure directly onto the choke core, eliminating the need for separate mounting space on the printed circuit board. This integration drastically reduces the lateral dimensions of the module while maintaining the damping properties needed for high frequency noise reduction.
Solution Approach 2:
The patent transitions from a planar layout where capacitors are mounted on the PCB surface next to the choke to a three-dimensional integration where the capacitor electrode layers are formed on the vertical surfaces or internal structure of the choke core. This dimensional change allows for compact packaging without increasing the footprint area.
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 integrated capacitor plate achieves high attenuation in radio bands up to 1000 MHz with adjustable capacitance, reducing DC resistance and inductance, thus enhancing noise reduction in high frequency ranges compared to discrete capacitors, and allowing for compact design without additional space requirements.
Implementation Method 1
The support comprises a capacitor plate, which comprises at least one first electrode layer, at least one second electrode layer and at least one dielectric layer arranged between the first and second electrode layers
Implementation Method 2
The choke may comprise a magnetic core and at least one windings. In particular, the choke may comprise two or more windings
Data Source
AI summary
A choke module having a choke that includes a magnetic core and at least one winding and a support having a capacitor plate. The plate includes at least one first electrode layer, at least one second electrode layer, and at least one dielectric layer. The choke is located on the capacitor plate.