Multilayered Electromagnetic Band Gap Element Size Reduction
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Solution Overview
Problem
Conventional electromagnetic band gap structures, such as the mushroom type, are not suitable for compact electronic devices due to their large size, and further size reduction is required to effectively prevent electromagnetic wave propagation in specific frequency bands.
Innovation Solution
A compact electromagnetic band gap element is achieved by forming a planar conductor and a ground conductor on parallel planes with linear conductors in between, connected via vias, creating a multilayered structure that increases the reactance component and allows for a lower resonance frequency without increasing other design dimensions, thereby reducing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional mushroom type electromagnetic band gap structure is used, then the electromagnetic wave propagation can be prevented in a specific frequency band, but the structure size becomes large and is not suitable for compact electronic devices
Solution Approach 1:
The patent transitions from a conventional planar mushroom-type EBG structure to a multilayered three-dimensional configuration. Conductors are arranged on multiple parallel planes (first plane, second plane, and at least one third plane between them), creating a vertical stacking architecture. This dimensional transformation allows the structure to achieve the same electromagnetic wave blocking capability with reduced footprint area, making it suitable for compact electronic devices while maintaining the band gap functionality.
Solution Approach 2:
The patent implements a nested configuration where linear conductors on the third plane are positioned between and connect the planar conductors on the first and second planes. The conductors are arranged in a nested manner with vias penetrating through dielectric layers to establish electrical connections between different planes. This nesting approach maximizes the use of vertical space and achieves compact structure size while preserving the electromagnetic band gap properties.
2Volume of moving object
If the structure size is reduced using an open stub, then the electromagnetic band gap structure can be made smaller, but further size reduction is still demanded
Solution Approach 1:
The patent achieves further size reduction by utilizing the vertical dimension with multiple parallel planes. Instead of only planar arrangements, the structure extends in the thickness direction with conductors on the first plane, second plane, and intermediate third plane. This multilayered approach enables more aggressive miniaturization while providing additional design degrees of freedom through layer configuration, conductor positioning, and via placement, thereby maintaining design flexibility.
Solution Approach 2:
The patent segments the electromagnetic band gap structure into multiple functional layers separated by dielectric regions. Each plane with conductors represents a segmented functional unit, and the vias act as connection elements between segments. This segmentation allows independent optimization of each layer's dimensions and positioning, enabling further size reduction while maintaining adaptability for different design requirements and frequency bands.
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 multilayered structure effectively blocks electromagnetic waves in a desired frequency band, allowing for a more compact design while maintaining the same reactance component as conventional structures, offering increased design flexibility and size reduction.
Implementation Method 1
an electromagnetic band gap technology for preventing propagation of an electromagnetic wave in a specific frequency band has been examined. An electromagnetic band gap structure exhibits a magnetic wall effect
Data Source
AI summary
An electromagnetic band gap element is provided. In the electromagnetic band gap element, a first planar conductor and a second planar conductor are respectively formed on a first plane and a second plane which are parallel to each other, and a first linear conductor is formed on at least one third plane that is parallel to the first plane and the second plane and is located between the first plane and the second plane. The first planar conductor and the second planar conductor are connected via the first linear conductor.