Segmented Curved RF Aperture for Broadband Capture and Low Reflection
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Solution Overview
Problem
Existing RF apertures face challenges in achieving a compact, lightweight, and broadband RF capture with efficient energy utilization and reduced reflections.
Innovation Solution
The RF aperture design features an array of electrically conductive tapered projections arranged to define a curved aperture surface, including a cylinder aperture surface, with baluns and RF circuitry mounted on printed circuit boards to manage signal connectivity and energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional RF aperture designs are used, then broadband RF capture is achieved, but the structure becomes bulky and heavy
Solution Approach 1:
The aperture surface is segmented into multiple electrically conductive tapered projections distributed across the surface. Each projection acts as an independent RF capture element, allowing the system to achieve broadband coverage through the collective action of many small elements rather than requiring a large continuous aperture structure.
Solution Approach 2:
The invention transitions from a planar aperture surface to a three-dimensional curved surface with tapered projections extending outward. This dimensional transformation allows the aperture to capture RF energy from multiple angles and frequencies simultaneously, achieving broadband performance in a compact form factor.
2Loss of energy
If conventional aperture structures are employed, then RF energy is captured, but reflections occur reducing energy utilization efficiency
Solution Approach 1:
Each tapered projection is designed with specific local geometric properties (taper angle, height, base diameter) optimized for its position on the aperture surface. This local optimization ensures that each element minimizes reflections for its specific orientation while contributing to the overall broadband capture performance of the entire aperture.
Solution Approach 2:
The aperture surface is designed as a curved surface rather than flat, and the projections themselves have tapered (curved) geometries. This curvature helps to gradually transition RF wave impedance, reducing abrupt reflections and improving energy capture efficiency across a broad frequency range.
3Adaptability or versatility
If simple aperture designs are used, then manufacturing is easier, but adaptability to different RF frequencies and applications is limited
Solution Approach 1:
The array of tapered projections is designed to perform multiple functions simultaneously: capturing RF energy across a broad frequency spectrum, providing directional sensitivity through their spatial arrangement, and minimizing reflections through their geometric design. This multi-functionality is achieved within a single integrated aperture structure that can be manufactured using standard techniques.
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 design enables efficient broadband RF capture, reduces reflections, and achieves a compact and lightweight form factor, enhancing the aperture's performance and versatility in RF communications.
Implementation Method 1
An array of electrically conductive tapered projections 20 are arranged to define a curved aperture surface 18
Implementation Method 2
baluns mounted on the at least one printed circuit board wherein each balun has a balanced port electrically connected with two neighboring electrically conductive tapered projections
Data Source
AI summary
A radio frequency (RF) aperture includes an array of electrically conductive tapered projections arranged to define a curved aperture surface, such as a semi-cylinder aperture surface, or a cylinder aperture surface (which may be constructed as two semi-circular aperture surfaces mutually arranged to define the cylinder aperture surface). The RF aperture may further include a top array of electrically conductive tapered projections arranged to define a top aperture surface. The top aperture surface may be planar, and a cylinder axis of cylinder aperture surface may be perpendicular to the plane of the planar top aperture surface. The RF aperture may further include baluns mounted on at least one printed circuit board, each having a balanced port electrically connected with two neighboring electrically conductive tapered projections of the array and further having an unbalanced port.