Dielectric Filter With Adjacent Magnetic Coupling
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Solution Overview
Problem
Dielectric filters with multiple resonators face complexity in achieving two attenuation poles in the frequency response of insertion loss, often requiring structural contrivances for electromagnetic coupling between non-adjacent resonators, leading to increased structural complexity.
Innovation Solution
A dielectric filter design featuring an even number of dielectric resonators with magnetic coupling between adjacent resonators and a capacitor for capacitive coupling between input/output ports, simplifying the structure while generating two attenuation poles in the frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic coupling is established between non-adjacent dielectric resonators to generate attenuation poles, then the frequency response characteristics are improved, but the structural complexity increases
Solution Approach 1:
The patent segments the coupling mechanism into distinct types: magnetic coupling for adjacent resonators and electric coupling for non-adjacent resonators. This segmentation allows the filter to achieve complex frequency response characteristics through a systematic arrangement of simpler coupling elements, reducing overall structural complexity while maintaining performance.
Solution Approach 2:
The patent introduces an intermediary coupling mechanism where adjacent dielectric resonators provide magnetic coupling that mediates the interaction between non-adjacent resonators. This intermediary approach enables attenuation pole generation without requiring direct complex coupling structures between all resonator pairs.
2Reliability
If structural contrivances are added to provide electromagnetic coupling between non-adjacent resonators, then attenuation poles are generated, but the manufacturing complexity increases
Solution Approach 1:
The patent utilizes parameter changes in the dielectric resonators, specifically varying the relative permittivity values (first relative permittivity for resonators, second relative permittivity for peripheral dielectric) to control coupling strength and resonance characteristics. This allows attenuation pole generation through material parameter selection rather than complex structural modifications.
Solution Approach 2:
The patent employs composite dielectric structures combining resonator dielectric material with peripheral dielectric material of different relative permittivity. This composite approach enables precise control of electromagnetic coupling and resonance properties, achieving desired frequency response characteristics through material composition rather than mechanical complexity.
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 achieves a simple structure with two attenuation poles in the frequency response of insertion loss, enhancing the filter's performance in high-frequency bands like quasi-millimeter and millimeter wave ranges.
Implementation Method 1
two dielectric resonators adjacent to each other in circuit configuration are magnetically coupled to each other
Implementation Method 2
a capacitor for capacitively coupling the first input/output port and the second input/output port
Data Source
AI summary
A dielectric filter has a first input/output port, a second input/output port, an even number of dielectric resonators, and a capacitor for capacitively coupling the first input/output port and the second input/output port. The even number of dielectric resonators are provided between the first input/output port and the second input/output port in circuit configuration, and are configured so that two dielectric resonators adjacent to each other in circuit configuration are magnetically coupled to each other.