Dual-Flange RF Window Spacing for Wideband Transmission
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Solution Overview
Problem
Radio-frequency (RF) windows commonly limit the transmission of wide bands of frequencies in RF devices, failing to match or exceed the operational bandwidth of these devices, which restricts their performance in applications requiring instantaneous or sweeping frequency access.
Innovation Solution
A wide-bandwidth RF window design featuring flange assemblies with precisely manufactured electromagnetic wave interface elements, positioned with controlled spacing, to generate a resonant mode that matches the operational frequency band of the RF device, using materials like ceramic and metal to minimize RF losses and optimize wave propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional RF window designs are used, then the structure is simple, but the bandwidth is limited and cannot match the operational frequency band of RF devices
Solution Approach 1:
The RF window is divided into multiple flange assemblies, each containing electromagnetic wave interface elements. This segmentation allows each flange assembly to be independently designed and optimized for specific frequency ranges, enabling the overall structure to achieve wide bandwidth while maintaining manageable complexity through modular construction
Solution Approach 2:
The patent varies the geometries (size, shape, orientation) and materials of the electromagnetic wave interface elements to optimize RF performance across different frequency bands. By changing these parameters, the window can be tuned to match the operational bandwidth of wideband RF devices without requiring a complete redesign of the entire structure
2Adaptability or versatility
If multiple electromagnetic wave interface elements are used to expand bandwidth, then the frequency band coverage increases, but the positioning precision requirements increase
Solution Approach 1:
By dividing the RF window into separate flange assemblies with interface elements, the patent allows each element to be positioned independently within its own flange. This segmentation reduces the cumulative positioning error that would occur in a single-piece design, as each flange assembly can be manufactured and positioned with standard tolerances
Solution Approach 2:
The flange assemblies serve as intermediary structures that hold the electromagnetic wave interface elements. These flanges provide mechanical support and precise positioning features, acting as mediators between the interface elements and the overall RF window structure, thereby reducing the direct positioning precision requirements
3Reliability
If varying geometries and materials of electromagnetic wave interface elements is implemented, then RF performance is optimized, but the manufacturing complexity increases
Solution Approach 1:
The patent systematically varies the geometries and materials of interface elements to optimize RF performance for specific frequency ranges. This parameter optimization is achieved through careful design of the flange assemblies, which can be manufactured using standard fabrication techniques, balancing performance requirements with manufacturing feasibility
Solution Approach 2:
The RF window employs composite construction with flanges made of metal or other waveguide materials and interface elements made of ceramic or other low-RF-loss materials. This composite approach allows each material to be optimized for its specific function while being manufactured using established processes for each material type
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 design achieves high-quality RF performance across a wide frequency band, reducing manufacturing complexity and precision demands, enabling efficient transmission in applications such as communications, radar, and bio-chemistry, while maintaining ultra-high vacuum conditions.
Implementation Method 1
By generating the electromagnetic wave interface element of the same or nearly the same size and shape of the waveguide, the flange assembly generates a resonant mode at a certain frequency in the operating band of the waveguide. The size, shape and material properties of the electromagnetic wave interface element dictate the frequency and the quality factor of the resonant mode.
Implementation Method 2
Radio-frequency (RF) windows (irises) are used to separate and transport an electromagnetic wave from one medium to another. For example, in vacuum electronic devices, RF windows are used to enclose a vacuum envelope on one side of the RF window and to allow transportation of the electromagnetic wave from inside of the vacuum envelope to different atmospheric conditions
Implementation Method 3
Each electromagnetic wave interface element may be made of ceramic and/or one or more other materials with low RF losses. In some embodiments, the flange may be made of metal and/or one or more other materials that allow for propagation and constraining of the electromagnetic wave.
Data Source
AI summary
A radio-frequency (RF) window comprises a first flange assembly including a first flange having a first flange thickness between a first surface and a second surface, and a first waveguide channel; and a first window element having a first window thickness and disposed in the first waveguide channel at a first location; and a second flange assembly stacked against the first flange assembly, the second flange assembly including a second flange having a second flange thickness between a third surface and a fourth surface, and a second waveguide channel; and a second window element having a second window thickness and disposed in the second waveguide channel at a second location, such that when the first flange assembly is stacked against the second flange assembly the second window element has a predetermined distance to the first window element, the predetermined distance selected based on a desired frequency band of operations.