Antenna Element Layout Using Stepped Substrate Thickness
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Solution Overview
Problem
In antenna elements where a radiation electrode and a ground electrode are arranged oppositely, ensuring a suitable distance for capacitance coupling can be challenging, especially in limited dielectric substrates, leading to difficulties in improving radiation characteristics.
Innovation Solution
The antenna element incorporates a dielectric substrate with distinct thickness portions, where the radiation electrode lies opposite to both a first and a second ground electrode, with a via conductor coupling them, allowing part of the radiation electrode to be positioned further from one ground electrode without opposing the second, thereby enhancing radiation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the radiation electrode and ground electrode are arranged in a thin portion of the dielectric substrate, then the antenna element can be formed in limited space, but the distance between the radiation electrode and ground electrode cannot be ensured, making it difficult to improve radiation characteristics
Solution Approach 1:
The dielectric substrate is divided into a first portion (thick) and a second portion (thin). The radiation electrode is positioned in the first portion to ensure adequate distance from the ground electrode for proper radiation characteristics, while the overall antenna element can still be implemented in limited space by utilizing the thin second portion for other components or routing.
Solution Approach 2:
The patent utilizes the thickness dimension of the dielectric substrate by creating regions with different thicknesses. This allows the radiation electrode to be positioned at an optimal distance from the ground electrode in the thickness direction, thereby improving radiation characteristics while maintaining a compact overall structure.
2Reliability
If the radiation electrode and ground electrode are arranged in a thick portion of the dielectric substrate, then the distance between them can be ensured for proper capacitance coupling, but the available space for arranging the antenna element is limited
Solution Approach 1:
The dielectric substrate is segmented into regions of different thicknesses, allowing the radiation electrode to be positioned in a thick portion for proper capacitance coupling while other portions of the substrate remain thin to minimize overall area usage and accommodate other components.
Solution Approach 2:
The dielectric substrate has non-uniform thickness with a first portion being thicker than a second portion. This local variation in thickness allows the radiation electrode to be positioned in the thick first portion to ensure proper capacitance coupling, while the thin second portion reduces the overall footprint and allows for better space utilization.
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 improves radiation characteristics by increasing the band width and return loss, allowing for better signal emission and reception, even in constrained substrate spaces.
Implementation Method 1
The via conductor couples the first ground electrode and the second ground electrode
Implementation Method 2
a distance with a certain length from the ground electrode needs to be provided so as to keep capacitance coupling between the radiation electrode and the ground electrode at a suitable strength
Data Source
AI summary
An antenna element includes a dielectric substrate, a first ground electrode, a second ground electrode, a via conductor, and a radiation electrode. The dielectric substrate includes a first portion shaped like a flat plate and a second portion thinner than the first portion. The first ground electrode is arranged in the first portion. The second ground electrode is arranged in the second portion. The via conductor couples the first ground electrode and the second ground electrode. A distance between the radiation electrode and the first ground electrode in a first thickness direction is more than a distance between the radiation electrode and the second ground electrode in a second thickness direction. Part of the radiation electrode lies opposite to the first ground electrode without lying opposite to the second ground electrode.