Compact Multiband High-Impedance Surface Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-electromagnetic-impedance surface devices struggle to independently adjust multiple resonant frequencies and often have narrow reflection bands, leading to bulkiness and limited spectral width.
Innovation Solution
A high-impedance surface device comprising separate cylindrical compartments with electrically conductive internal surfaces, each with a single aperture, filled with dielectric material and covered by periodic electrically conductive patterns, allowing for adjustable resonant wavelengths and wider spectral reflection bands by varying compartment distances and dielectric/magnetic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mushroom-type structure with interleaved matrices of electromagnetic resonators is used to achieve multiple resonant frequencies, then the device can exhibit at least two resonant frequencies, but the resonant frequencies cannot be adjusted independently and the reflection bands are narrow
Solution Approach 1:
The device is divided into separate compartments, each containing an electromagnetic resonator. This segmentation allows each resonator to be independently designed and tuned to specific resonant frequencies, enabling independent adjustment of multiple resonant frequencies without the complexity of interleaved matrices.
Solution Approach 2:
The patent introduces reconfigurable elements that allow the electrical characteristics of the resonators to be dynamically adjusted. This enables the resonant frequencies to be tuned and adapted independently for each resonator, transforming a static structure into a dynamically adjustable system.
2Adaptability or versatility
If a mushroom-type structure with interleaved matrices is used to achieve multiple resonant frequencies, then the device can reflect electromagnetic waves at different frequencies, but the reflection bands are narrow
Solution Approach 1:
Each compartment is designed with specific local characteristics including varying dimensions, dielectric materials, and conductor configurations. These localized quality variations enable each resonator to contribute to broader reflection bands at its resonant frequency, and when combined, create wide spectral coverage across multiple frequencies.
3Adaptability or versatility
If traditional high-impedance surface devices are designed to handle multiple frequencies, then they can operate at different resonant frequencies, but the device becomes bulky
Solution Approach 1:
Multiple electromagnetic resonators are arranged in a compact three-dimensional configuration where smaller resonators can be positioned within or between larger ones. This nesting approach allows multiple resonant frequencies to be achieved within a reduced overall device volume compared to traditional planar expansions.
Solution Approach 2:
The patent transitions from traditional two-dimensional planar arrangements to three-dimensional spatial configurations. By utilizing vertical stacking and depth dimensions, multiple resonators can be packed more efficiently, achieving multiband operation in a compact volume without the bulkiness of conventional designs.
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
Enables compact, multiband operation with adjustable resonant frequencies and wider spectral reflection bands, reducing electromagnetic coupling and improving interference robustness in satellite positioning signal receivers.
Implementation Method 1
each compartment being filled with a dielectric material, each compartment thus covered forming at least one electromagnetic resonator
Implementation Method 2
each electromagnetic resonator exhibiting a resonant wavelength
Implementation Method 3
high-electromagnetic-impedance surface device
Implementation Method 4
reflect any incident electromagnetic wave having a frequency in a narrow band centered around this resonant frequency
Data Source
AI summary
Some embodiments are directed to a high impedance surface device. The high impedance surface device can include a set of at least two separate, substantially cylindrical compartments, that have internal surfaces in an electrically conductive material. The compartments each define, at one end, a single aperture, oriented on the same side, and covered by at least one periodic structure of electrically conductive patterns. Each compartment is filled with a dielectric material, and is thus covered forming at least one electromagnetic resonator. Each electromagnetic resonator exhibits a resonant wavelength. The at least two compartments are separated from one another by a distance less than the shortest resonant wavelength exhibited by the resonators that they form. At least two respective resonant wavelengths of the electromagnetic resonators formed by the at least two covered compartments are different, and the periodic structure exhibits a spatial period less than half the shortest resonant wavelength.