Radio Frequency Filter Conductive Pattern Configuration
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Solution Overview
Problem
Current radio frequency filters are inadequate for efficiently filtering RF signals in high frequency bands such as 24 GHz, 28 GHz, 36 GHz, and 60 GHz, which are required for emerging communication technologies like 5G and mmWave communications.
Innovation Solution
A radio frequency filter design featuring a specific configuration of conductive patterns with varying lengths, widths, and separation distances, along with electromagnetic coupling, to create a bandwidth that effectively filters RF signals while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional radio frequency filter designs are used, then the filter structure is simple, but the filter cannot efficiently filter RF signals in high frequency bands (24 GHz, 28 GHz, 36 GHz, 60 GHz)
Solution Approach 1:
The filter is divided into multiple conductive patterns (first through sixth conductive patterns) with distinct functions. Each pattern segment performs a specific filtering operation, allowing the overall filter to handle high frequency bands effectively while maintaining manageable complexity through functional decomposition
Solution Approach 2:
The conductive patterns are arranged in a nested configuration where the second conductive pattern is surrounded by the third conductive pattern, and the fifth conductive pattern is surrounded by the sixth conductive pattern. This nested structure enables efficient high-frequency filtering while compacting the overall filter design
2Reliability
If the filter uses extended conductive patterns with specific separation distances, then the bandwidth and skirt characteristics are improved, but the filter size increases
Solution Approach 1:
The conductive patterns have varying widths at different locations to achieve specific filtering characteristics. The first and fourth conductive patterns have widths greater than their respective separation distances in certain directions, creating localized impedance variations that improve bandwidth control and skirt characteristics without requiring uniform expansion of the entire filter structure
Solution Approach 2:
The conductive patterns extend in multiple directions with selective separation distances. The first conductive pattern extends toward the fourth conductive pattern from the first point, and the fourth extends toward the first from the third point, creating a multi-dimensional arrangement that optimizes filtering performance while controlling overall footprint
3Area of stationary object
If the conductive patterns are positioned close together to reduce filter size, then the area is reduced, but the electromagnetic coupling and signal interference increase
Solution Approach 1:
Different separation distances are applied in different directions and locations. The separation distance between the first and fourth conductive patterns is controlled to be greater than or equal to the separation distance between the third and sixth conductive patterns, creating localized electromagnetic isolation where needed while maintaining compact overall dimensions
Solution Approach 2:
The third and sixth conductive patterns act as intermediary shielding elements that surround the second and fifth conductive patterns respectively. This intermediary arrangement provides electromagnetic isolation between adjacent conductive patterns, reducing signal interference while allowing compact positioning
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 filter design achieves improved skirt characteristics and a finely adjusted bandwidth, efficiently passing desired RF signals while filtering out noise, and can be integrated into radio frequency modules without increasing overall size, enhancing communication performance.
Implementation Method 1
a seventh conductive pattern electromagnetically coupled to at least a portion of the third conductive pattern; and an eighth conductive pattern electromagnetically coupled to at least a portion of the sixth conductive pattern
Data Source
AI summary
A radio frequency filter includes a first conductive pattern; a second conductive pattern connected to a first point of the first conductive pattern and extended; a third conductive pattern connected to a second point of the first conductive pattern and extended to surround a portion of the second conductive pattern; a fourth conductive pattern; a fifth conductive pattern connected to a third point of the fourth conductive pattern and extended; and a sixth conductive pattern connected to a fourth point of the fourth conductive pattern and extended to surround a portion of the fifth conductive pattern. The first conductive pattern extends toward the fourth conductive pattern and the fourth conductive pattern extends toward the first conductive pattern. A distance between the first conductive pattern and the fourth conductive pattern is greater than or equal to a distance between the third conductive pattern and the sixth conductive pattern.