Single-Layer RF Filter Structure for Slim Frequency Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional radio frequency filters face challenges in reducing size and weight due to their multi-cavity structure and requirement for additional conductive material for inductive or capacitive coupling.
Innovation Solution
A filter design for communication devices featuring a frequency tuning panel with tuning bars and a resonance substrate with resonators, both disposed as single layers within a dielectric material-filled space, allowing for frequency tuning by adjusting the separation distance between resonators and eliminating the need for additional conductive material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a multi-cavity structure with resonators extending in the thickness direction is used, then frequency tuning capability is achieved, but the filter thickness and size cannot be reduced
Solution Approach 1:
The patent transitions from a conventional multi-cavity structure with resonators extending in the thickness direction to a planar single-layer structure where resonators are arranged in the length direction. This dimensional change allows the filter to achieve frequency tuning capabilities while reducing thickness, as the resonators no longer need to extend vertically through multiple cavities but instead are configured in a horizontal plane.
Solution Approach 2:
The patent divides the filter into distinct functional layers: a resonance substrate containing resonators and a separate frequency tuning panel with tuning bars. This segmentation allows independent optimization of each layer's function while maintaining overall compactness, enabling thickness reduction without sacrificing tuning capability.
2Reliability
If additional conductive material is installed for inductive or capacitive coupling to reinforce skirt characteristics, then frequency response is improved, but filter weight significantly increases
Solution Approach 1:
The patent combines the coupling function with the existing resonator and tuning bar structures. The resonators on the resonance substrate and tuning bars on the frequency tuning panel directly provide inductive and capacitive coupling through their spatial arrangement and electromagnetic interaction, eliminating the need for separate additional conductive coupling materials and thereby reducing overall filter weight.
Solution Approach 2:
The resonators and tuning bars serve multiple functions simultaneously: they provide frequency determination, field confinement, and inter-stage coupling. This multi-functionality eliminates the need for dedicated additional conductive materials for coupling, as the primary resonant structures themselves fulfill the coupling role, thus preventing weight increase.
3Adaptability or versatility
If resonators are arranged in multiple cavities with tuning covers, then frequency tuning is achieved, but manufacturing complexity and weight increase
Solution Approach 1:
The patent moves from a vertical multi-cavity arrangement requiring complex tuning cover deformation to a horizontal planar arrangement where frequency tuning is achieved by adjusting the separation distance between resonators and tuning bars in the length direction. This dimensional shift simplifies manufacturing as it avoids complex engraving and multi-cavity assembly, while maintaining tuning versatility through geometric adjustment.
Solution Approach 2:
The patent employs a可调 (adjustable) separation distance between the resonance substrate and frequency tuning panel, allowing dynamic frequency tuning without complex mechanical deformation of tuning covers. This dynamic adjustment mechanism simplifies manufacturing by replacing complex engraving processes with simpler geometric reconfiguration, while maintaining adaptability across different frequency requirements.
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 design facilitates a slim and lightweight filter manufacturing process while maintaining effective frequency tuning capabilities, reducing the overall weight and size of the filter.
Implementation Method 1
a dielectric material-filled space... to adjust a separation distance between a plurality of resonators disposed within the dielectric material-filled space
Implementation Method 2
a radio frequency filter (including all 'communication devices') is usually composed of a connection structure of a plurality of resonators... each resonator has a structure in which a dielectric resonance element (dielectric resonance element (DR)) or a metal resonance element is installed inside a cavity
Data Source
AI summary
The present invention relates to a communication device filter. Particularly, the communication device filter comprises: a frequency tuning panel comprising multiple tuning bars disposed in a dielectric material-filled space as a single layer with regard to the thickness direction so as to adjust the distance of spacing from multiple resonators disposed in the dielectric material-filled space; and a resonance substrate disposed in the dielectric material-filled space as a single layer with regard to the thickness direction such that the multiple resonators are formed as the single layer, the resonance substrate comprising a resonance frame having a rectangular edge. Accordingly, the present invention provides advantages in that not only is product slim design possible, but any increase in product weight can be prevented.