Front Feed Microwave Antenna Using Metamaterial Panels
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Solution Overview
Problem
Feed-forward microwave antennas in prior art suffer from energy loss due to electromagnetic wave blocking by the emission source and are costly and difficult to manufacture, requiring high precision and complex processing.
Innovation Solution
A feed-forward microwave antenna design utilizing metamaterial panels with refractive index gradients and artificial metal microstructures or holes to diverge and refract electromagnetic waves, reducing reflection loss and energy loss, and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a metal paraboloid is used to reflect electromagnetic waves, then directional propagation is achieved, but energy loss occurs due to blocking by the emission source and manufacturing costs increase
Solution Approach 1:
The patent extracts the paraboloidal reflective function from the metal paraboloid and implements it using a planar reflective panel combined with gradient-index metamaterials. This separates the reflection function from the complex three-dimensional paraboloid structure, enabling easier manufacturing while maintaining directional propagation capability.
Solution Approach 2:
The patent changes the refractive index parameter of the metamaterial panels to create gradient-index distributions that simulate the focusing and reflecting effects of a metal paraboloid. By varying the refractive index spatially, the planar panels achieve the same electromagnetic wave control as the curved metal surface.
2Manufacturing precision
If a metal paraboloid with high processing precision is used, then antenna gain and directivity are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent segments the continuous paraboloidal surface into discrete planar panels with metamaterial structures. Each panel contains artificial metal microstructures or holes arranged in specific patterns that collectively provide the paraboloidal reflection effect, avoiding the need to manufacture a single precise curved surface.
Solution Approach 2:
The patent creates a functional copy of the metal paraboloid's electromagnetic wave controlling capability using planar metamaterial panels. Instead of copying the physical curved shape, the invention copies the optical function through gradient-index metamaterials that reproduce the focusing and reflecting properties.
3Measurement precision
If a large CNC machine tool is used to process the paraboloid, then cutting precision is improved, but equipment difficulty and cost increase
Solution Approach 1:
The patent replaces the expensive, difficult-to-obtain large CNC machine tool with standard manufacturing processes that can create planar panels with printed or etched metamaterial patterns. The solution uses readily available equipment to produce panels that achieve the same functional precision through metamaterial design rather than mechanical precision.
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 convergence performance, increases transmission distance, reduces antenna size, and lowers production costs by avoiding energy loss and simplifying the manufacturing process.
Implementation Method 1
a first metamaterial panel adapted for diverging an electromagnetic wave emitted by the emission source
Implementation Method 2
a second metamaterial panel... The refractive indexes of each of the circular region and the annular regions decrease continuously from a maximum refractive index np of the core metamaterial sheet layer to a minimum refractive index n0 of the core metamaterial sheet layer with increase of the radius
Implementation Method 3
is reflected by the reflective panel
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A front feed microwave antenna, which comprises a radiation source, a first metamaterial panel used for radiating an electromagnetic wave emitted by the radiation source, a second metamaterial panel, and a reflective panel affixed to the back of the first metamaterial panel. The electromagnetic wave is emitted via the first metamaterial panel, refracted by entering the second metamaterial panel, reflected by the reflective panel, and finally re-refracted by reentering the second metamaterial panel, then finally parallel-emitted. Employment of the principle of metamaterial for manufacturing the antenna allows the antenna to break away from restrictions of conventional concave lens shape, convex lens shape, and parabolic shape, thereby allowing the shape of the antenna to be panel-shaped or any shape as desired, while allowing for reduced thickness, reduced size, facilitated processing and manufacturing, reduced costs, and improved gain effect.