Electronic Circuit EBG Structure for Signal Line Isolation
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Solution Overview
Problem
Conventional electromagnetic band gap (EBG) structures simultaneously affect multiple signal lines, leading to the propagation of electromagnetic waves between them, which complicates the design of electronic circuits and imposes heavy restrictions.
Innovation Solution
The design of an electronic circuit with a compact EBG structure where conductors are arranged to independently act on each signal line by overlapping only one signal line while not overlapping adjacent lines, using a specific configuration of conductors on multiple layers to prevent electromagnetic wave propagation between signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional EBG structure is used to prevent electromagnetic wave propagation, then electromagnetic wave attenuation is achieved, but the structure simultaneously affects multiple signal lines causing design restrictions
Solution Approach 1:
The EBG structure is segmented into individual units, each dedicated to a specific signal line. The third conductor is positioned to overlap only one first conductor (signal line) and not others, creating independent EBG units that prevent electromagnetic wave propagation on each line separately without affecting adjacent lines.
Solution Approach 2:
The EBG structure is localized to specific positions where conductors overlap individual signal lines. By controlling the spatial arrangement so that the third conductor overlaps only one first conductor at a time, the electromagnetic wave prevention effect is applied locally to each signal line independently, avoiding global design restrictions.
2Area of stationary object
If signal lines are densely arranged to reduce mounting area, then area efficiency is improved, but electromagnetic waves propagate between adjacent signal lines through the EBG structure
Solution Approach 1:
The EBG structure is divided into separate units for each signal line. Each unit's third conductor is positioned to overlap only its corresponding first conductor (signal line), creating independent electromagnetic wave prevention zones that allow dense signal line arrangement without cross-line interference.
Solution Approach 2:
The third conductor acts as an intermediary element that provides electromagnetic wave prevention specifically for one signal line at a time. By positioning it to overlap only one first conductor, it mediates the electromagnetic field interaction locally, preventing wave propagation between densely arranged signal lines.
3Object-affected harmful factors
If the EBG structure is designed to prevent electromagnetic wave propagation on one signal line, then wave attenuation is achieved, but heavier restrictions are imposed on circuit design
Solution Approach 1:
The EBG structure is segmented into independent units, each associated with one signal line. This segmentation allows the circuit designer to apply EBG structures selectively where needed without imposing restrictions on the entire circuit, thereby maintaining design flexibility while achieving wave attenuation where required.
Solution Approach 2:
The electromagnetic wave prevention is applied locally at specific positions where the third conductor overlaps a first conductor, rather than globally across the entire circuit. This localized approach allows other areas of the circuit to be designed freely, improving overall circuit design flexibility.
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
This configuration effectively attenuates electromagnetic waves in specific frequency bands, such as 2.4 GHz, and prevents their propagation to adjacent signal lines, allowing for a more flexible and efficient design of electronic circuits without increasing the mounting area or cost.
Implementation Method 1
an electromagnetic band gap structure has an arrangement having an open stub inserted between parallel plates
Data Source
AI summary
An electronic circuit includes at least two first conductors having line shapes which are arranged on a first plane of a substrate, a second conductor arranged on a second plane of the substrate, and a third conductor having a line shape, with at least part thereof being arranged on a third plane between the first plane and the second plane of the substrate. The open end of the third conductor is included in part of the third conductor which is arranged on the third plane, and the part is arranged to at least partly overlap one of at least the two first conductors and not to overlap the other first conductor when viewed from a direction perpendicular to the substrate.