Waveguide Filter Notch Post Layout for Flexible Cross Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing waveguide filters face limitations in designing notches on both sides of the passband due to restrictions imposed by symmetric or asymmetric cross coupling, particularly in ceramic structures, which complicates filter design and increases manufacturing costs.
Innovation Solution
A waveguide filter design incorporating a notch post that allows for adjustable cross coupling intensity and configuration between resonators, enabling flexible notch placement and improved filter characteristics through capacitive or inductive coupling adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two types of cross coupling are used to implement notches on both sides of the passband, then the filter performance is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines both types of cross coupling (even-numbered and odd-numbered resonator coupling) into a single unified filter structure. The housing contains multiple resonance blocks with resonators that can be configured to achieve both coupling types simultaneously, eliminating the need for separate filter structures and reducing overall design complexity while maintaining the ability to place notches on both sides of the passband.
Solution Approach 2:
The filter housing and resonance blocks are designed with universal functionality to support multiple coupling configurations. The same basic structural elements can be arranged to achieve either even-numbered or odd-numbered cross coupling, allowing a single filter design to adapt to different notch placement requirements without requiring completely different structures.
2Reliability
If two types of cross coupling structures are implemented, then the notch characteristics are improved, but the ease of manufacture deteriorates due to difficulty in inserting additional structures into ceramic filters
Solution Approach 1:
The filter is divided into multiple independent resonance blocks that can be separately manufactured and then assembled into the housing. Each resonance block contains resonators that can be configured for specific coupling types, allowing modular manufacturing where complex cross coupling structures are broken down into manageable segments that are easier to fabricate and assemble.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of resonance blocks within the housing to achieve complex coupling characteristics. By arranging resonators in multiple dimensions and utilizing vertical stacking of resonance blocks, the filter achieves both types of cross coupling without requiring additional complex inserted structures, thereby simplifying the manufacturing process while maintaining notch characteristics.
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 simplifies filter complexity, reduces manufacturing costs, and enhances productivity by allowing customizable notch placement and improved performance across various communication systems.
Implementation Method 1
The resonator is designed to give resonance characteristics to an electromagnetic wave to restrict a specific frequency
Implementation Method 2
a notch post installed adjacent to the plurality of resonators and configured to form cross coupling between the plurality of resonators adjacent to each other
Data Source
AI summary
The present invention relates to a waveguide filter having an enhanced property of a specific passband through cross coupling using a resonator, and can set cross coupling in a limited space by providing a notch post, simplify the complexity of a filter by allowing the properties or strength of the cross coupling to be changed according to the position or form thereof, and implement various filter performances.