Integrated Dual-Band Waveguide Filter for High-Power Stability
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Solution Overview
Problem
There is a need for small-scale duplexers that can operate with high power and maintain temperature stability across high-frequency bands, particularly in dual-band wireless communication systems.
Innovation Solution
A dual-band waveguide filter is designed with two filters integrated into a single waveguide structure, featuring input and output common junctions and resonance blocks with perforated openings, allowing for the transmission of multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate filters are used for dual-band operation, then frequency selectivity is improved, but device size and structural complexity increase
Solution Approach 1:
The patent combines two separate filters into a single integrated waveguide filter structure. The first and second filters share a common waveguide body with unified input and output common junctions, eliminating the need for separate filter housings and interconnections. This merging approach maintains dual-band frequency selectivity while reducing overall device complexity and size.
Solution Approach 2:
The waveguide filter is designed with multi-functional capability to handle both first and second frequency bands within a single structure. The common junctions and shared waveguide body serve multiple functions: signal input/output for both bands, filtering for two different frequency ranges, and structural support for both filter sections. This universal design achieves dual-band operation without requiring separate dedicated components for each band.
2Volume of moving object
If filters are integrated into a single waveguide structure, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
While integrated into a single waveguide body, the filter structure is segmented into distinct first and second filter sections with separate resonance block arrangements. Each filter section can be independently designed and manufactured with standard tolerances, then assembled or molded as a unified structure. This segmentation approach reduces the overall manufacturing precision burden compared to creating a fully monolithic integrated filter.
Solution Approach 2:
The waveguide filter employs local quality variations through differently configured resonance blocks in the first and second filter sections. Each section has tailored resonance block dimensions, positions, and arrangements optimized for its specific frequency band. This localized optimization allows each filter section to meet its performance requirements with manageable precision tolerances while maintaining overall integration benefits.
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 dual-band waveguide filter effectively transmits two or more bands with improved power handling and temperature stability, enabling efficient operation in high-frequency wireless communication systems.
Implementation Method 1
The plurality of resonance blocks may each include a resonance groove provided in the form of a groove having a predetermined depth from an upper surface of the filter housing
Data Source
AI summary
One embodiment of the present disclosure provides a dual-band waveguide filter including: a filter housing; an input common junction including an input port hole positioned at one side of the filter housing; an output common junction including an output port hole positioned at the other side of the filter housing and positioned to be opposite to the input port hole; and two filters positioned to be spaced apart from each other at a predetermined gap in an alignment direction of the input port hole and the output port hole in the filter housing and connected by the input common junction and the output common junction, in which a signal is inputted to the input port hole, and a signal is outputted from the output port hole.