Multilayer High-Frequency Filter Structure for Custom Passband Tuning
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Solution Overview
Problem
Current high frequency filters, particularly those designed for 5G spectrum frequencies, face challenges in customization and performance optimization due to their waveguide or cavity designs, which are difficult to tailor for specific applications.
Innovation Solution
A high frequency multilayer filter is developed, comprising a plurality of dielectric layers with conductive elements such as inductors and capacitors, where the inductor is electrically connected to a signal path and ground, and capacitors have electrodes separated by dielectric layers, allowing for selective arrangement and material selection to achieve characteristic frequencies greater than 8 GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If waveguide or cavity designs are used for high frequency filters, then performance characteristics are achieved, but customization and performance optimization become difficult
Solution Approach 1:
The filter is divided into multiple discrete layers (first dielectric layer, second dielectric layer, third dielectric layer) with conductive patterns on each layer. This segmentation allows independent design and optimization of each layer's functionality while maintaining overall filter performance, enabling customization without increasing overall design complexity.
Solution Approach 2:
The invention transitions from traditional waveguide/cavity designs to a planar multilayer structure, adding the vertical dimension with stacked dielectric layers. This dimensional change enables compact customization while maintaining high-frequency performance, allowing different filter responses to be achieved through varying layer configurations rather than complex 3D cavity structures.
2Speed
If traditional waveguide designs are used, then high frequency operation is achieved, but performance tailoring for specific applications becomes difficult
Solution Approach 1:
Different dielectric layers have different properties (first dielectric layer, second dielectric layer, third dielectric layer with potentially different materials and thicknesses). This local quality variation allows specific performance characteristics to be tailored at different locations and frequencies, enabling customization for specific applications while maintaining high-frequency operation capability.
Solution Approach 2:
The filter performance is tailored by changing parameters such as dielectric constant, loss tangent, layer thickness, and conductor trace geometry. These parameter changes allow the same basic multilayer structure to be optimized for different frequency ranges and application requirements without changing the fundamental high-frequency operating capability.
3Adaptability or versatility
If multilayer structure with multiple dielectric layers is used, then customization capability is improved, but manufacturing complexity increases
Solution Approach 1:
The filter is constructed by stacking separate dielectric layers with conductive patterns, allowing each layer to be manufactured and prepared independently before assembly. This segmentation enables standardized manufacturing processes for each layer type, reducing overall manufacturing complexity despite the multiple-layer structure enabling extensive customization.
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 multilayer filter design achieves excellent performance characteristics, including low insertion loss and rejection of frequencies outside the passband, with the ability to maintain performance across a wide range of temperatures and frequencies, making it suitable for high-frequency applications.
Implementation Method 1
A high frequency multilayer filter may include a plurality of dielectric layers and a signal path having an input and an output
Implementation Method 2
The multilayer filter may include an inductor including a conductive layer formed over a first dielectric layer
Implementation Method 3
The multilayer filter may include a capacitor including a first electrode and a second electrode that is separated from the first electrode by a second dielectric layer
Data Source
AI summary
A high frequency multilayer filter may include a plurality of dielectric layers and a signal path having an input and an output. The multilayer filter may include an inductor including a conductive layer formed over a first dielectric layer. The inductor may be electrically connected at a first location with the signal path and electrically connected at a second location with at least one of the signal path or a ground. The multilayer filter may include a capacitor including a first electrode and a second electrode that is separated from the first electrode by a second dielectric layer. The multilayer filter has a characteristic frequency that is greater than about 6 GHz.