Notched Ground Plate Antenna for Horizontal Polarization
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Solution Overview
Problem
Existing antenna devices struggle to generate a horizontally polarized wave in a horizontal plane due to the interference of a ground conductor, which hinders the efficient transmission and reception of electromagnetic waves.
Innovation Solution
The antenna device is designed with an antenna element positioned to avoid overlapping with the ground conductor in a parallel plane, utilizing notches or non-overlapping configurations to minimize phase current interference, allowing for effective generation of horizontally polarized waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an antenna element is formed on the ground plate to generate horizontally polarized waves, then the horizontally polarized wave generation is improved, but the ground plate area requirement increases
Solution Approach 1:
The antenna element is positioned at a height above the ground plate, transitioning from a two-dimensional planar arrangement to a three-dimensional spatial configuration. This vertical dimensionality change allows the antenna element to generate horizontally polarized waves effectively without requiring additional ground plate area, as the element operates in a different spatial plane above the ground surface.
Solution Approach 2:
The antenna system is segmented into distinct components: the ground plate remains as a separate base structure, while the antenna element is positioned independently above it at a specific height. This segmentation allows each component to fulfill its function independently - the ground plate provides grounding and structural support, while the elevated antenna element generates the desired horizontally polarized radiation pattern without being constrained by ground plate area limitations.
2Volume of moving object
If the antenna element is positioned close to the ground plate, then the mounting space is reduced, but the horizontally polarized wave generation is hindered due to phase current interference
Solution Approach 1:
A dielectric body or insulating structure serves as an intermediary between the ground plate and the antenna element. This intermediary maintains a controlled spacing that prevents direct contact while managing the electromagnetic field distribution. The dielectric material allows the antenna element to be positioned relatively close to the ground plate for compact mounting, while simultaneously preventing excessive phase current interference by controlling the coupling between the element and ground plane.
Solution Approach 2:
The height parameter of the antenna element above the ground plate is optimized to a specific value or range. By carefully controlling this vertical parameter, the system achieves a balance between compact mounting space and effective horizontally polarized wave generation. The optimal height minimizes unwanted phase current effects while maintaining practical compactness, representing a parameter optimization solution to the contradiction.
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 solution enables satisfactory transmission and reception of horizontally polarized waves, maintains antenna characteristics, and reduces the required ground plate area without increasing the mounting space, achieving improved frequency bands and reduced interference.
Implementation Method 1
an antenna element (30) which extends at a position so as not to overlap with the ground conductor (20) in a plane substantially parallel to the ground conductor (20), and transmits and/or receives an electromagnetic wave of a horizontally polarized wave when the antenna element (30) is horizontally arranged
Data Source
Figure 1A~1B
Figure 2~3
Figure 4~6
AI summary
Provided is an antenna device having a ground plate, which is capable of transmitting and receiving an electromagnetic wave of a horizontally polarized wave when being horizontally arranged. A rectangular notch (22) is formed in the ground plate (20) to have both a right and left edge portions (21) with a predetermined width being left, and an antenna element (30) of a resonant-type is provided at a position overlapping with the notch (22) in a plane substantially parallel to the ground plate (20). Accordingly, a horizontally polarized electromagnetic wave can be generated in a horizontal direction, when the antenna element (30) is horizontally arranged.