Dielectric Resonator With Through-Hole For Narrow Stop-Band Filtering
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Solution Overview
Problem
Existing resonators in wireless communication systems have narrow stop-bands and often exhibit undesired pass bands, failing to provide adequate high-frequency filtering and attenuation characteristics.
Innovation Solution
A filter design incorporating a ceramic resonator with a conductive film, housed in a partitioned cavity with input and output connectors, coupling disks, and a tuning screw, allowing for adjustable coupling and resonant frequency tuning to enhance attenuation and band-stop performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing resonators are used, then the device structure is simple, but the stop-band is very narrow and undesired pass bands periodically occur
Solution Approach 1:
The resonator body is segmented by forming a through-hole that divides the ceramic structure into distinct regions, creating a more complex internal geometry that improves stop-band characteristics and eliminates undesired pass bands while maintaining manufacturing feasibility
Solution Approach 2:
The through-hole creates a porous or hollow structure within the ceramic resonator body, which modifies the electromagnetic field distribution and resonance characteristics to achieve narrower stop-bands and improved attenuation without requiring entirely new material compositions
2Reliability
If existing resonators are used, then the manufacturing process is simple, but the blocking characteristics are insufficient
Solution Approach 1:
The through-hole segmentation is integrated into the ceramic forming process, allowing the complex internal structure to be manufactured in a single firing cycle, thus maintaining ease of manufacture while improving blocking characteristics
Solution Approach 2:
The dimensions, position, and geometry of the through-hole are carefully controlled as manufacturing parameters to optimize electromagnetic performance and blocking characteristics, transforming a simple geometric feature into a performance-critical design element
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 filter achieves improved attenuation characteristics and band-stop performance, ensuring low signal loss within the desired frequency band and significant attenuation of unwanted frequencies, making it suitable for high-frequency applications.
Implementation Method 1
resonator capable of achieving both narrow-band characteristics and high blocking characteristics
Implementation Method 2
Both the cross-sections of the body of the resonator in the lengthwise direction and the wall surface of the through-hole are plated with the conductive film
Data Source
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AI summary
A resonator and a filter including the same are provided. The resonator includes a body formed of a dielectric material and including a through-hole formed in one direction, and a conductive film coupled to at least one of both side cross-sections of the body in a lengthwise direction and a wall surface of the through-hole.