Ceramic Waveguide Filter Grooves for Ultra-Short Delay Tuning

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Ceramic waveguide filters face challenges in adjusting ultra-short delays and attenuating spurious waves due to spatial or structural constraints, which affect signal interference and skirt characteristics.

Innovation Solution

A ceramic waveguide filter design incorporating groove-shaped portions for input and output ends, with adjustable ultra-short delay adjusters and slots between resonant blocks to regulate delays and attenuate spurious waves.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dielectric ceramic waveguide filters are used, then signal filtering performance is improved, but adjusting ultra-short delay becomes difficult due to spatial or structural constraints

Engineering Contradiction:

Improvesignal filtering performanceVSAvoidadjusting ultra-short delay

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The filter structure is divided into multiple resonant blocks, each with independent resonators. This segmentation allows individual adjustment of ultra-short delay parameters at input and output ends without affecting the entire filter structure, resolving the contradiction between maintaining filtering performance and enabling adjustable delay characteristics.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces adjustable mechanisms (such as movable resonators or variable coupling structures) that allow dynamic adjustment of ultra-short delay parameters after fabrication. This transforms the static ceramic filter into a dynamically adjustable system, maintaining the reliability of ceramic material while enabling operational flexibility.

Inventive Principle:

Principle #15Dynamics

2Ease of manufacture

If conventional filter structures are used, then fabrication is simpler, but spurious waves cannot be effectively attenuated

Engineering Contradiction:

Improvefabrication simplicityVSAvoidspurious waves

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent converts the potentially harmful spurious waves into beneficial effects by strategically placing resonant blocks and resonators to suppress unwanted frequency components. The resonant structures that could potentially generate spurious signals are instead configured to attenuate them, transforming the problem into a solution while maintaining conventional fabrication methods.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

Different regions of the filter are given different functional qualities - resonant blocks are optimized for signal filtering while specific regions are designed for spurious wave attenuation. This local differentiation allows the filter to simultaneously maintain ease of manufacture and effectively suppress harmful spurious signals through targeted structural design.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12609429B2Ceramic waveguide filter including a plurality of resonators and ultra-short delay adjusters each formed by respective groove-shaped portions

Publication Date: 2026.04.21 KMW INC

AI summary

A ceramic waveguide filter is disclosed. According to at least one embodiment of the present disclosure, a ceramic waveguide filter forming a plurality of resonant blocks including a ceramic dielectric is provided, including an input end and an output end each defined by a groove-shaped portion having a predetermined depth on an outer surface of the ceramic waveguide filter, a plurality of resonators each defined by a groove-shaped portion having a predetermined depth on an outer surface of each of the plurality of resonant blocks, and at least one ultra-short delay adjusters adjacent to at least one of the input end and the output end, the ultra-short delay adjuster being defined by a groove-shaped portion having a predetermined depth on the outer surface of the ceramic waveguide filter.