Dielectric Artificial Impedance Surface Antenna Thickness Modulation
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Solution Overview
Problem
Existing artificial impedance surface antennas (AISAs) are costly due to the use of high-cost substrates and require time-consuming etching techniques, limiting their mass production and practicality for applications like millimeter-wave systems.
Innovation Solution
Dielectric artificial impedance surface antennas (DAISAs) are fabricated using a dielectric material with varying thickness to modulate impedance, allowing for the use of conventional manufacturing methods like milling or stereo-lithography, which reduces costs and enables mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic patches are printed onto a dielectric substrate to create surface-wave impedance modulation, then the antenna achieves proper impedance modulation and radiation performance, but the manufacturing cost increases and production time extends
Solution Approach 1:
The patent changes the physical parameter of the dielectric substrate from uniform thickness to variable thickness to achieve impedance modulation. By controlling the thickness profile of the dielectric material, the antenna achieves the desired surface-wave impedance modulation without requiring expensive metallic patch printing processes.
Solution Approach 2:
The patent replaces expensive, difficult-to-manufacture metallic patches with a simpler, cheaper dielectric structure. The variable thickness dielectric can be manufactured using conventional molding or machining techniques, significantly reducing production cost and time while maintaining the essential impedance modulation function.
2Manufacturing precision
If conventional manufacturing methods are used to create metallic patch arrays, then manufacturing precision can be maintained, but the process becomes time-consuming and costly
Solution Approach 1:
The patent replaces the complex metallic patch array structure with a simple variable thickness dielectric structure that can be manufactured using conventional, high-productivity methods such as injection molding or CNC machining. This eliminates the need for time-consuming etching processes while maintaining sufficient precision for antenna operation.
Solution Approach 2:
The patent transforms the design from controlling metallic patch dimensions and positions to controlling dielectric thickness distribution. The thickness profile can be directly formed using conventional manufacturing methods, enabling mass production without compromising the essential impedance modulation 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 DAISAs effectively radiate signals at desired frequencies and angles with improved cost-effectiveness and manufacturing efficiency, suitable for various applications including conformal mounting on curved surfaces.
Implementation Method 1
a dielectric with a thickness, the dielectric thickness varying to provide a modulated impedance to a signal traversing the dielectric
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4C
AI summary
A dielectric artificial impedance surface antenna (DAISA) including a dielectric with a thickness, the dielectric thickness varying to provide a modulated impedance to a signal traversing the dielectric, the dielectric having a first surface, and a second surface opposite the first surface.