3D Parasitic Patch Antenna Gain vs Size
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Solution Overview
Problem
The commercialization of patch antennas with parasitic elements is limited by the increased size, which restricts the design of the accommodating case due to the need for space, especially when the parasitic element is disposed to face the radiating element, resulting in a larger profile shape.
Innovation Solution
A patch antenna design featuring a three-dimensionally shaped parasitic element with a planar-view area wider than the radiating element, positioned apart to cover it, allowing for improved design flexibility and maintaining or enhancing antenna gain without increasing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thin plate-like parasitic element is disposed to face the radiating element, then the antenna gain is improved, but the total size of the patch antenna is enlarged
Solution Approach 1:
The parasitic element is configured in a three-dimensional shape (such as bent, folded, or stepped configurations) rather than a simple planar form. This allows the element to achieve the necessary electrical length and radiation characteristics while occupying less planar space, thereby improving antenna gain without significantly increasing the overall volume of the antenna assembly.
Solution Approach 2:
The three-dimensionally shaped parasitic element is designed to fit within or alongside other antenna components, effectively nesting the parasitic structure within the existing antenna volume. This allows the parasitic element to be incorporated without proportionally increasing the total antenna size, resolving the contradiction between gain improvement and size enlargement.
2Reliability
If a thin plate-like parasitic element is disposed to face the radiating element, then the antenna gain is improved, but the design flexibility of the accommodating case is restricted
Solution Approach 1:
By transitioning from a two-dimensional planar parasitic element to a three-dimensional configuration, the antenna achieves improved gain characteristics while presenting a more compact profile that can be adapted to various case shapes and sizes, thereby restoring design flexibility to the accommodating case.
Solution Approach 2:
The parasitic element employs flexible three-dimensional configurations (such as bent or folded structures) that can be adapted to different spatial constraints and case geometries, allowing the antenna design to be versatile across different application scenarios while maintaining improved gain performance.
Data Source
AI summary
A patch antenna is provided with an antenna main body including a radiating element on an upper surface of a dielectric body; and a parasitic element disposed at a predetermined distance from the radiating element. The parasitic element is a metal material having an upward convex shape as a whole and including a planar portion which is parallel to the upper surface of the radiating element and two bent portions which are inclined portions inclined from both ends of the planar portion toward the radiating element. While the parasitic element has a three-dimensional shape as a whole, the parasitic element has a planar-view area wider than a planar-view area of the radiating element in a planar view as seen from the first surface side of the dielectric body, and is provided in a position apart from the radiating element and to cover the radiating element.