Suspended Antenna Filter Structure for Compact 5G Cross Coupling
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Solution Overview
Problem
Existing filters in wireless communication systems, particularly those used in 5G technology, face challenges in miniaturization and mass production due to their reliance on metal cavity structures, which are sensitive to tuning and require additional components for cross coupling, leading to increased size and production defects.
Innovation Solution
A filter design featuring a suspended structure with a resonance plate and T-shaped resonators on a single layer, utilizing air gaps to minimize size and simplify assembly, while generating multiple cross couplings without additional structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If metal cavity structures are used in filters, then filter performance is maintained, but filter size increases and production complexity increases
Solution Approach 1:
The patent replaces the traditional metal cavity mechanical structure with a planar resonance plate structure that uses electromagnetic resonance principles. This substitution eliminates the need for complex three-dimensional metal cavities while maintaining filter performance through carefully designed resonant circuits on a flat substrate, thereby reducing filter size and simplifying production.
Solution Approach 2:
The patent creates a simplified planar version of the traditional metal cavity filter by copying the essential resonant functionality onto a flat resonance plate. The resonance plate with T-shaped resonators replicates the electromagnetic resonance behavior of metal cavities in a two-dimensional format, achieving the same filter performance with reduced complexity and size.
2Reliability
If additional structures are added for cross coupling, then filter performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the cross coupling function directly into the T-shaped resonators on the resonance plate. The resonators are designed with specific geometries and orientations that inherently provide cross coupling between different resonant modes, eliminating the need for separate additional cross coupling structures and reducing overall device complexity while maintaining performance.
Solution Approach 2:
The T-shaped resonators serve multiple functions simultaneously: they provide resonance at specific frequencies, enable cross coupling between modes, and define the filter's frequency response characteristics. This multi-functionality reduces the number of separate components needed and simplifies the overall filter structure.
3Productivity
If traditional filter structures are used, then mass production is challenging, but production precision can be maintained
Solution Approach 1:
The patent segments the filter into a planar resonance plate with T-shaped resonators that can be manufactured using standard PCB or substrate fabrication techniques. This segmentation into a flat, two-dimensional structure with defined geometric patterns allows for precise reproduction through automated manufacturing processes, improving both productivity and maintaining manufacturing precision.
Solution Approach 2:
The patent changes the structural parameters from three-dimensional metal cavity dimensions to two-dimensional planar geometric patterns. This parameter change enables the use of standard planar fabrication processes with tight tolerances, ensuring consistent reproduction across mass production while improving manufacturing efficiency compared to complex metalworking operations.
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 suspended structure filter achieves miniaturization and enhanced performance by reducing dielectric loss and process errors, allowing for efficient mass production and improved communication capabilities.
Implementation Method 1
a resonance plate provided between the cover and the PCB; and a plurality of resonators provided on a single layer in the resonance plate
Implementation Method 2
The PCB, the resonance plate, and the cover may be stacked in sequence in a first direction, a first surface of the resonance plate and the cover may be arranged to form a first air gap in the first direction
Data Source
AI summary
A filter in a wireless communication system includes: a cover; a housing; a printed circuit board (PCB); a resonance plate provided between the cover and the PCB; and a plurality of resonators provided on a single layer in the resonance plate.