Dielectric Waveguide Filter Cross-Coupling Attenuation
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Solution Overview
Problem
Existing dielectric waveguide filters face challenges in increasing attenuation characteristics without extending the filter length, which is a concern in applications with space limitations.
Innovation Solution
The implementation of both direct and alternative cross-coupling mechanisms between resonators in a dielectric waveguide filter, utilizing conductive material layers and internal windows or pads to facilitate RF signal transmission, allowing for enhanced attenuation without increasing the filter's length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional resonators are incorporated to increase attenuation characteristics, then the attenuation performance is improved, but the length of the filter increases
Solution Approach 1:
The patent introduces cross-coupling mechanisms that operate in alternative dimensions or paths between resonators. Specifically, it uses both direct coupling (adjacent resonators) and cross-coupling (non-adjacent resonators through coupling slots), effectively adding a dimensional aspect to the signal transmission paths. This allows attenuation enhancement without simply extending the linear length of the filter, as the cross-coupling creates additional signal paths that interact in a multi-dimensional space within the filter structure.
Solution Approach 2:
The patent employs coupling slots as intermediary elements that enable cross-coupling between non-adjacent resonators. These coupling slots act as mediators that facilitate indirect signal transmission paths, allowing energy to couple between resonators that are not directly adjacent. This intermediary mechanism provides additional attenuation control without requiring additional resonators that would extend the filter length.
2Reliability
If direct and cross-coupling mechanisms are implemented, then the attenuation characteristics are enhanced, but the device complexity increases
Solution Approach 1:
The coupling slots in the patent serve multiple functions simultaneously: they act as both direct coupling elements between adjacent resonators and as cross-coupling elements between non-adjacent resonators. This multi-functionality reduces the need for separate dedicated structures for each coupling type, thereby managing complexity while achieving enhanced attenuation characteristics through both direct and cross-coupling mechanisms.
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
This approach effectively increases the attenuation characteristics of the waveguide filter without lengthening it, making it suitable for applications with space constraints.
Implementation Method 1
first internal windows for the direct transmission of the RF signal between resonators
Implementation Method 2
second internal means for the indirect transmission of the RF signal between resonators
Data Source
AI summary
A waveguide filter for the transmission of an RF signal comprising a plurality of blocks of dielectric material coupled together in a combined side-by-side and stacked relationship. Each of the blocks defines resonators and includes an exterior surface that is covered with a layer of conductive material and defines internal layers of conductive material with the blocks coupled together. The internal layers of conductive material include regions devoid of conductive material that define internal windows for the transmission of the RF signal between resonators in the side-by-side and stacked blocks. The internal layers of conductive material also include regions devoid of conductive material that define isolated pads of conductive material for the indirect transmission of the RF signal between resonators in the stacked blocks.