Glass-Ceramic Microwave Filter Refractive Index Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing filters for electromagnetic radiation in 5G networks are inefficient in transmitting desired signals while rejecting unwanted frequencies, and current materials like fused silica are expensive and impractical for widespread use.
Innovation Solution
A glass-ceramic microwave filter with a refractive index gradient, comprising multiple glass-ceramic substrates separated by regions of lower refractive index, effectively transmits at least 70% of electromagnetic radiation within the 20 GHz to 100 GHz frequency range and reflects at least 80% outside this range, utilizing materials like Pyroceram and hydrogen microfoam to enhance dielectric properties and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials like fused silica are used for microwave filters, then transmission performance is improved, but cost and practicality deteriorate
Solution Approach 1:
The patent replaces expensive fused silica with a cost-effective glass-ceramic composite material that achieves comparable transmission performance (≥70% in 20-100 GHz band) while being more practical for widespread 5G infrastructure deployment
Solution Approach 2:
The patent uses a composite glass-ceramic material combining glass substrate with ceramic particles or crystalline phases, achieving the desired dielectric properties and mechanical strength at lower cost than pure fused silica
2Device complexity
If a simple single-layer filter structure is used, then device complexity is reduced, but filtering performance deteriorates
Solution Approach 1:
The patent divides the filter into multiple functional layers including glass-ceramic substrates, dielectric layers, and metallic patterned layers, where each layer contributes specific filtering characteristics to achieve ≥80% rejection outside the 20-100 GHz band
Solution Approach 2:
The patent transitions from conventional two-dimensional planar filters to a three-dimensional multilayer stacked structure, enabling enhanced frequency selectivity and compact integration for 5G antenna systems
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 glass-ceramic microwave filter achieves efficient signal transmission and noise rejection in the 5G frequency domain with low loss tangent, making it more economical and practical for 5G infrastructure compared to conventional materials.
Implementation Method 1
a first glass-ceramic substrate having a first refractive index, a second glass-ceramic substrate having the first refractive index, and a first region disposed between the first glass-ceramic substrate and the second glass-ceramic substrate. The first region has a second refractive index that is less than the first refractive index
Implementation Method 2
The filter transmits at least 70% of electromagnetic radiation within a band of frequencies and reflects at least 80% of electromagnetic radiation outside the band of frequencies
Data Source
AI summary
Embodiments of a filter for electromagnetic radiation are disclosed herein. The filter includes a first glass-ceramic substrate having a first refractive index, a second glass-ceramic substrate having the first refractive index, and a first region disposed between the first glass-ceramic substrate and the second glass-ceramic substrate. The first region has a second refractive index that is less than the first refractive index. Further, the second glass-ceramic substrate is arranged substantially parallel to and spatially disposed from the first glass-ceramic substrate. The filter transmits at least 70% of electromagnetic radiation within a band of frequencies and reflects at least 80% of electromagnetic radiation outside the band of frequencies. The band of frequencies is located within the frequency range of 20 GHz to 100 GHz.