Folded Coaxial RF Mirror for Rugged Field Radar
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Solution Overview
Problem
Conventional coaxial RF mirrors are delicate and awkward, making them unsuitable for field applications due to design constraints that limit their ruggedness and length.
Innovation Solution
A coaxial RF mirror design featuring an outer and inner cylindrical pipe with fluoropolymer filling and conductive surfaces, along with rods, which reduces length and increases ruggedness, facilitating field use by employing a folded structure with alternating high and low impedance sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coaxial RF mirror design is used, then narrow-band filtering function is achieved, but the structure becomes delicate and awkward for field use
Solution Approach 1:
The patent implements a nested structure where an inner pipe is placed inside an outer pipe, creating a compact folded coaxial configuration. This nesting approach reduces the overall footprint and structural complexity while maintaining the required electromagnetic filtering function, making the mirror more rugged and suitable for field deployment.
Solution Approach 2:
The patent transitions from a conventional linear coaxial structure to a folded three-dimensional configuration using nested pipes and strategic positioning of conductive elements. This dimensional reorganization reduces the linear length and structural delicacy while preserving the electromagnetic resonance characteristics.
2Ease of operation
If conventional coaxial RF mirror design is used, then electromagnetic signal reflection is achieved, but the length becomes excessive for convenient field deployment
Solution Approach 1:
By nesting the inner pipe within the outer pipe and folding the coaxial structure, the patent dramatically reduces the linear length of the mirror while maintaining functional equivalence. This compact configuration enables convenient field deployment and integration into space-constrained radar systems.
Solution Approach 2:
The patent employs a three-dimensional folded layout that collapses the linear length into a compact volumetric structure. This dimensional transformation achieves the required electromagnetic function in a shorter, more field-deployable form factor.
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 enhances the ruggedness and reduces the length of coaxial RF mirrors, enabling more convenient field deployment while maintaining low signal loss and high Q-resonation, suitable for radar applications.
Implementation Method 1
A coaxial RF mirror can be employed to provide narrow-band filtering. However, conventional RF mirrors lack qualities that facilitate field use due to design constraints that render these delicate and awkward.
Implementation Method 2
The mirror includes an outer pipe, an inner pipe, and first and second rods... The outer and inner pipes are cylindrical tubes... fluoropolymer fills the annular region between the inner and outer pipes... The outer pipe has an electrically conductive inner surface, the inner pipe has electrically conductive inner and outer surfaces, and the first and second rods have conductive surfaces.
Data Source
AI summary
A coaxial mirror is provided for reflecting an electromagnetic signal. The mirror includes an outer pipe, an inner pipe, and first and second rods. The outer pipe extends between input and output ports, with closed initial and final terminals disposed at their respective ports. The inner pipe extends between a closed fore end and an open aft end. The inner pipe is coaxially disposed between the initial and final terminals within the outer pipe. The first rod, coaxially disposed within the outer pipe, extends from the input port to the fore end. The second rod, coaxially disposed within the inner pipe, extends from downstream of the fore end to the output port. Preferably, the first and second pipes are cylindrical tubes. Preferably, fluoropolymer fills the annular region between the inner and outer pipes, and fluoropolymer foam fills the inner pipe. Preferably, the first pipe has an electrically conductive inner surface, the second pipe has electrically conductive inner and outer surfaces, and the first and second rods have conductive surfaces. A first embodiment includes a conductor, coaxially disposed within the inner pipe, that extends from the fore end to the second rod. In a second embodiment, the second rod is hollow, and is preferably filled with the foam.