Ceramic Waveguide Filter Cross-Coupling With Integrated Notch Bar
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Solution Overview
Problem
Existing ceramic waveguide filters for antennas face challenges in implementing cross coupling due to complex designs and difficulty in inserting additional structures, limiting their ability to tailor notch positions and filter characteristics for different communication systems.
Innovation Solution
A ceramic waveguide filter design that incorporates a notch structure bar and notch partition groove on either the input or output porthole, allowing for easy implementation of cross coupling without additional structures, enabling flexible notch positioning and improved resonance design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cross coupling is implemented in existing ceramic waveguide filters, then notch characteristics can be achieved, but the design becomes very complicated and additional structures are difficult to insert
Solution Approach 1:
The patent merges the cross-coupling function into the existing resonator structure by forming a conductive film that connects adjacent resonators. This eliminates the need for separate additional coupling structures, thereby achieving notch characteristics while avoiding increased design complexity.
Solution Approach 2:
The conductive film on the resonator surface serves multiple functions: it acts as both the resonator boundary and the cross-coupling mechanism. This multi-functionality allows the filter to achieve notch characteristics without requiring dedicated additional structures, thus maintaining design simplicity.
2Adaptability or versatility
If additional structures are inserted for cross coupling, then coupling design can be implemented, but it is difficult to insert additional structures into the filter
Solution Approach 1:
The patent combines the coupling function with the existing resonator body by forming a conductive film directly on the resonator surface. This eliminates the need to insert separate additional structures, making the filter easier to manufacture while maintaining coupling design flexibility.
Solution Approach 2:
The patent achieves different coupling designs by changing the parameters of the conductive film (such as its position, shape, and connectivity) rather than by inserting different physical structures. This approach maintains manufacturing simplicity while providing design versatility.
3Adaptability or versatility
If filters are differently set for various communication systems, then notch positions can be customized, but the design and manufacturing process becomes more complex
Solution Approach 1:
The patent enables customization of notch positions by changing the parameters of the conductive film configuration on the resonator surface. This allows different filter characteristics for various communication systems without requiring fundamentally different structural designs, thereby maintaining manufacturing consistency.
Solution Approach 2:
The conductive film structure serves as a universal platform that can be configured in different ways to achieve various notch positions and coupling characteristics. This multi-functionality allows a single base design to serve multiple communication system requirements without increasing overall design 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
Facilitates easy resonance design and enhances passband characteristics by allowing for customizable notch placement on either side of the passband, simplifying structural design and improving productivity and reliability.
Implementation Method 1
a plurality of resonators, each resonator being caused to serve as a single resonator by a plurality of resonator posts respectively provided in the plurality of resonance blocks included in the housing
Implementation Method 2
either the input porthole or the output porthole is provided with a notch structure bar integrally formed in the housing, which extends towards a resonator post skipping from an adjacent resonator post among the plurality of resonator posts
Data Source
AI summary
The present disclosure relates to a ceramic waveguide filter for an antenna, which, in particular, includes a housing including a plurality of resonance blocks which are prepared from a dielectric having a predetermined dielectric constant, and some of which are partitioned by an inner partition wall; a plurality of resonators, each resonator being caused to serve as a single resonator by a plurality of resonator posts respectively provided in the plurality of resonance blocks included in the housing; and an input porthole to which an input port is connected to input a signal to any one of the plurality of resonators, and an output porthole to which an output port is connected to output a signal from any one of the plurality of resonators, Since either the input porthole or the output porthole is provided with a notch structure bar integrally formed in the housing, which extends towards the resonator post skipping from the adjacent resonator post among the plurality of resonator posts, advantageously the notch design of the passband can be performed with easy.