Single-Layer RF Filter Layout for Slim Frequency Tuning
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Solution Overview
Problem
Conventional radio frequency filters face challenges in reducing size and weight due to their design, which requires additional conductive material for inductive or capacitive coupling, leading to increased thickness and weight.
Innovation Solution
The filter design includes 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
1Reliability
If additional conductive material is installed for inductive or capacitive coupling to reinforce skirt characteristics, then the filtering performance is improved, but the weight and thickness of the filter significantly increase
Solution Approach 1:
The patent merges the coupling structure with the resonator structure itself. The coupling is achieved through the spatial arrangement and electromagnetic interaction between adjacent resonators within the dielectric material, eliminating the need for separate conductive coupling materials. This integration maintains filtering performance while significantly reducing weight.
Solution Approach 2:
The patent extracts and eliminates the additional conductive material that was previously required for coupling. By using the resonators' own structures and their spatial relationships within the dielectric material to achieve coupling, the design removes unnecessary components, thereby reducing overall filter weight and thickness.
2Reliability
If resonators are arranged in multiple layers or with complex coupling structures to achieve desired frequency characteristics, then the filtering performance is improved, but the thickness of the filter increases
Solution Approach 1:
The patent transitions from vertical stacking (thickness direction) to horizontal arrangement (planar direction) of resonators. By arranging resonators side-by-side within a single layer and utilizing electromagnetic coupling through the dielectric material, the design achieves complex frequency characteristics without increasing filter thickness, effectively moving the design strategy to another dimensional approach.
3Adaptability or versatility
If conventional cavity structures with extended resonators are used, then the resonance frequency can be tuned, but the size of the filter in the thickness direction cannot be reduced
Solution Approach 1:
The patent changes the fundamental parameters of the resonator structure from extended cavity types to compact planar types. By modifying the resonator geometry to lie within a single layer and adjusting parameters such as resonator dimensions, spacing, and dielectric material properties, the design achieves frequency tuning capability while maintaining a slim profile in the thickness direction.
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 manufacturing process, reduces product weight by eliminating unnecessary material, and enables fine frequency tuning within the constraints of the single-layer structure.
Implementation Method 1
a dielectric material-filled space
Implementation Method 2
a circuit element that resonates at a specific frequency by a combination of an inductor l and a capacitor C
Implementation Method 3
each resonator has a structure in which only an electromagnetic field of a unique frequency according to a processing frequency band exists in a cavity
Data Source
Figure 1
Figure 2A
Figure 2B
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.