Dielectric Wavefront-Shaping Structure With Low-Reflection Sidewalls
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Solution Overview
Problem
Existing electromagnetic radiation devices struggle with controlling and shaping phase fronts without mechanical moving parts, necessitating improved structures for efficient beamwidth and side lobe level management.
Innovation Solution
A dielectric structure with a monolithic body and structural disruptions in its sidewall, composed of materials with varying dielectric constants, converts spherical wavefronts into planar wavefronts, reducing electromagnetic reflections and enhancing gain and directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a dielectric structure is used to shape electromagnetic phase wavefronts, then gain and directivity are improved, but electromagnetic reflections increase
Solution Approach 1:
The patent applies local quality by introducing structural disruptions (ridges and grooves) at specific locations on the sidewall of the dielectric structure. These localized features modify the electromagnetic field distribution only in specific regions, reducing reflections without compromising the overall phase-shaping function and gain performance of the entire structure.
Solution Approach 2:
The patent converts the harmful effect of electromagnetic reflections into a beneficial feature by designing structural disruptions that intentionally create controlled impedance transitions. These disruptions, which could be seen as defects, actually serve to reduce reflections by matching impedance between different regions, thereby improving overall system performance.
2Length of stationary object
If the dielectric structure profile is reduced, then integration is improved, but phase front shaping capability is compromised
Solution Approach 1:
The patent employs parameter changes by varying the dielectric constant across different regions of the structure and adjusting the geometric parameters of the structural disruptions. This allows the structure to achieve effective phase front shaping with a reduced profile by optimizing the electromagnetic field interaction through controlled parameter variations rather than relying solely on physical dimensions.
Solution Approach 2:
The patent utilizes composite material principles by combining the dielectric material with structural disruptions of different geometries. This composite approach creates effective impedance matching and phase control with a compact profile, as the combination of materials and structures provides enhanced functionality that neither could achieve alone.
3Object-generated harmful factors
If structural disruptions are added to reduce reflections, then reflection reduction is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the sidewall surface into multiple discrete structural disruptions (ridges and grooves) rather than using a continuous complex structure. This segmented approach reduces reflections through multiple small impedance transitions while keeping each individual feature simple and manufacturable, thereby reducing overall device complexity.
Solution Approach 2:
The patent uses curved surfaces for the structural disruptions, replacing sharp edges with smooth transitions. This curvature reduces electromagnetic discontinuities and reflections while simplifying manufacturing compared to complex angular features, effectively reducing device complexity while maintaining reflection reduction performance.
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 dielectric structure effectively shapes electromagnetic phase wavefronts, improving gain and reducing side lobe levels, suitable for frequencies ranging from 57 GHz to 64 GHz, and is scalable for different applications.
Implementation Method 1
A dielectric structure with a monolithic body and structural disruptions in its sidewall, composed of materials with varying dielectric constants, converts spherical wavefronts into planar wavefronts
Implementation Method 2
the sidewall having a plurality of structural disruptions around an enclosing boundary of the interior cavity, the plurality of structural disruptions disposed and configured to reduce electromagnetic reflections
Data Source
AI summary
A dielectric structure useful for shaping electromagnetic, EM, phase wavefronts, includes: a body having a monolithic construct; the body having a height dimension, H, from a proximal end to a distal end equal to or less than 60% of an overall outside dimension, D, of the body at the distal end, the distal end being disposed a distance away from the proximal end along a z-axis of an orthogonal x-y-z coordinate system, the distal end forming an electromagnetic aperture of the structure; the body having a sidewall between the proximal end and the distal end that forms and defines an interior cavity that is open at the proximal end, and closed at the distal end, the sidewall having a plurality of structural disruptions around an enclosing boundary of the interior cavity, the plurality of structural disruptions disposed and configured to reduce electromagnetic reflections.