Patch Antenna Layout Using Parasitic Elements for Low-Elevation Gain
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Solution Overview
Problem
Conventional patch antennas have high directivity in normal directions but low gain in low-elevation directions, limiting their effectiveness in communication systems.
Innovation Solution
The placement of parasitic elements spaced away from the radiating element in a planar view allows for improved radiation characteristics, enhancing gain in low-elevation directions by varying the conductor lengths and distances of these elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parasitic elements are added to improve gain in low-elevation directions, then radiation characteristics are enhanced, but device complexity increases
Solution Approach 1:
The parasitic elements are integrated with the radiating element and ground plate to form a unified antenna structure. All elements share common supporting structures and are designed as a coordinated system, which minimizes additional complexity while achieving the desired gain enhancement in low-elevation directions.
Solution Approach 2:
The invention optimizes specific parameters of the parasitic elements such as their dimensions, positions, and spacing relative to the radiating element. By carefully adjusting these parameters, the antenna achieves improved low-elevation gain without requiring excessive numbers of elements, thereby controlling the overall device complexity.
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 significantly improves antenna gain in low-elevation directions while maintaining performance in high-elevation directions, optimizing communication efficiency.
Implementation Method 1
the parasitic element can vary radiation characteristics of radio waves, it is possible to implement a technique for improving the gain in low-elevation directions as viewed from the center of the radiating element
Data Source
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AI summary
A patch antenna (20) includes a radiating element (31) having a flat-plate shape, and a pair of parasitic elements (40-1 and 40-2) provided on opposite sides of the radiating element (31) at positions spaced away from the radiating element (31) in planar view in which the radiating element (31) is seen from a direction perpendicular to a plate surface of the radiating element (31). Suitably, the pair of the parasitic elements (40-1 and 40-2) is placed at positions on opposite sides of a line segment connecting a center of the radiating element (31) and a feeding point in the planar view, with longitudinal directions of the parasitic elements (40-1 and 40-2) being oriented along a direction of the line segment.