Gap Waveguide Antenna Layout for Precise Transfer-Line Coupling
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Solution Overview
Problem
Existing gap waveguides face challenges in precisely connecting with transfer lines, particularly in converting structures like MRGW, due to difficulties in aligning conductor blocks with boards, leading to manufacturing complexities.
Innovation Solution
An antenna device with a board incorporating conductor patterns and electromagnetic bandgap elements, connected via vias and a conductor plate, allowing for a simple and efficient connection between gap waveguides and transfer lines, utilizing electromagnetic bandgap elements to confine electromagnetic fields and enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductor block is used to connect the MRGW and the microstrip line, then the connection structure is formed, but it is not easy to precisely connect the conductor block to the board and manufacturing becomes complex
Solution Approach 1:
The patent removes the conductor block from the structure and replaces it with electromagnetic bandgap (EBG) elements formed directly on the board. This extraction of the problematic conductor block eliminates the alignment and connection difficulties while maintaining the functional requirements for signal transmission and electromagnetic confinement.
Solution Approach 2:
The patent merges the EBG elements directly onto the board surface, integrating the electromagnetic field confinement function into the board structure itself rather than using separate conductor blocks. This merging simplifies the overall structure and eliminates the need for precise alignment between separate components.
2Reliability
If the second conductor pattern has a length equal to or longer than approximately 1/4 of an operating wavelength, then radio wave propagation is improved, but the device size increases
Solution Approach 1:
The patent applies electromagnetic bandgap elements at specific locations along the second conductor pattern to create localized electromagnetic field confinement. This allows the conductor pattern to achieve effective radio wave propagation with enhanced field control at critical points, potentially reducing the overall length needed while maintaining propagation performance.
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
Facilitates a compact and high-performance structure by reducing transfer loss and enabling precise alignment, ensuring efficient radio wave propagation and conversion between gap waveguides and transfer lines.
Implementation Method 1
multiple first electromagnetic bandgap elements arranged on both sides of the first conductor pattern in a longitudinal direction on the board, multiple second electromagnetic bandgap elements arranged on both sides of the second conductor pattern in a longitudinal direction on the board
Data Source
AI summary
An antenna device includes a board including a conductor layer, a first conductor pattern arranged on a surface of the board, a connecting section that connects the first conductor pattern to the conductor layer, a second conductor pattern that has one end side connected to one end side of the first conductor pattern and has a length which is equal to or longer than approximately ¼ of an operating wavelength, multiple first electromagnetic bandgap elements arranged on both sides of the first conductor pattern in a longitudinal direction on the board, multiple second electromagnetic bandgap elements arranged on both sides of the second conductor pattern in a longitudinal direction on the board, a conductor plate that faces the first conductor pattern, and a third conductor pattern that has one end side connected to another end side of the second conductor pattern and is arranged on the surface of the board.