Metamaterial Radiating Element for Low Profile Antenna
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Solution Overview
Problem
Existing antenna technologies face challenges in designing low-profile radiating elements that can efficiently interact with electromagnetic waves while maintaining flexibility in frequency tuning and reducing costs, particularly in array antenna configurations.
Innovation Solution
The use of metamaterial radiating elements suspended in a substrate with a top and bottom metal layer, arranged in a non-uniform configuration, and integrated with a ground plane having a finger slot aperture and stripline feed, allows for scalable frequency operation and reduced back radiation without the need for vias, enhancing tuning capabilities and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional antenna designs are used, then structural support and electrical connection are achieved, but the profile height increases and manufacturing complexity increases due to required tuning features and vias
Solution Approach 1:
The patent removes the ground plane from the traditional antenna structure, extracting the harmful reflective surface that causes back radiation. This extraction allows the antenna to achieve low profile height without requiring complex tuning features or vias, as the ground plane is eliminated entirely while maintaining electrical connection through alternative means.
Solution Approach 2:
The patent transitions from a planar two-dimensional antenna structure to a three-dimensional configuration by suspending the radiating element in space above the substrate without a ground plane. This dimensional change enables low profile height while simplifying manufacturing by eliminating the need for complex tuning features and vias that are required in traditional planar designs.
2Stability of the object's composition
If ground plane is used for structural support, then mechanical stability is achieved, but back radiation increases and frequency tuning flexibility decreases
Solution Approach 1:
The patent extracts the ground plane from the antenna structure, removing the source of back radiation while maintaining mechanical stability through alternative support mechanisms. The radiating element is suspended without requiring a continuous ground plane, thereby eliminating the harmful reflective surface that causes back radiation.
Solution Approach 2:
The patent converts the harmful effect of the ground plane into a benefit by selectively removing it. The absence of the ground plane eliminates back radiation while the substrate and suspension structure provide the necessary mechanical stability, turning the previously harmful reflective surface into a design feature that enables low-profile operation without back radiation issues.
3Adaptability or versatility
If tuning features and vias are included, then frequency adjustment capability is achieved, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The patent creates a universal antenna design where the suspended radiating element structure itself provides frequency tuning capability through its geometric parameters, eliminating the need for separate tuning features and vias. The same structure serves multiple functions: radiation, mechanical support, and frequency determination, thereby reducing device complexity while maintaining adaptability.
Solution Approach 2:
The antenna structure is designed to be self-tuning through its inherent geometric properties rather than requiring external tuning features or vias. The suspended configuration allows the structure itself to determine and adjust frequency characteristics, making the antenna self-sufficient and reducing manufacturing complexity.
4Reliability
If vias are used for electrical connection, then ground connection is achieved, but manufacturing precision requirements increase and cost increases
Solution Approach 1:
The patent extracts the via structure from the design, eliminating the need for precise via alignment and drilling operations. Electrical connection is achieved through alternative means that do not require penetrating vias through multiple layers, thereby reducing manufacturing precision requirements and associated costs while maintaining connection reliability.
Solution Approach 2:
The patent transitions from two-dimensional planar via connections to three-dimensional suspended connections. Electrical connection is achieved through spatial arrangement and alternative connection paths that avoid the need for precise via alignment, reducing manufacturing complexity and cost while maintaining reliable electrical connection.
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 enables efficient electromagnetic wave interaction, reduces back radiation, and allows for flexible frequency tuning, improving antenna performance and reducing costs by eliminating the need for tuning features and vias, while maintaining a low profile suitable for various applications including satellite communication.
Implementation Method 1
Metamaterials may include materials designed to have magnetic or electric resonances
Implementation Method 2
Metamaterials may include materials designed to have magnetic or electric resonances
Implementation Method 3
Further, a metamaterial may have a negative refractive index
Implementation Method 4
When an electromagnetic wave interacts with a metamaterial, the metamaterial interacts with the electric and magnetic fields of the electromagnetic wave
Data Source
AI summary
An array antenna may include a substrate, an array of metamaterial elements including radiating elements suspended in the substrate and integrated with the array of dipoles, where the metamaterial elements include a first metal layer and a second metal layer connected by a via, an array of dipoles, a groundplane coupled with a first side of the substrate, the ground plane having a symmetric slot aperture and not contacting the array of metamaterial elements, and a stripline feed for the radiating elements, where the stripline feed passes from a groundplane first side through the symmetric slot aperture to a groundplane second side.