Multilayer High-Frequency Filter Layout for Custom 5G 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) that can be independently designed and manufactured. Each layer contains specific circuit elements (inductors, capacitors, transmission lines) that can be customized. This segmentation allows flexible customization of filter characteristics while maintaining manageable design complexity through modular construction.
Solution Approach 2:
The patent transitions from traditional two-dimensional waveguide/cavity designs to a three-dimensional multilayer structure. By stacking multiple dielectric layers with conductive patterns, the filter achieves enhanced customization capability in the vertical dimension while maintaining planar fabrication processes. This dimensional transition enables independent optimization of each layer's circuit elements.
2Reliability
If multilayer structure with conductive elements is used, then performance characteristics at high frequency are achieved, but manufacturing complexity increases
Solution Approach 1:
The filter structure is segmented into three distinct dielectric layers, each serving specific functional purposes. The first dielectric layer contains the inductor, the second contains the capacitor, and the third provides additional filtering functionality. This segmentation enables independent manufacturing and testing of each layer, improving overall reliability while facilitating standardized manufacturing processes for each module.
Solution Approach 2:
The multilayer structure employs universal fabrication techniques (conductive layer deposition, dielectric lamination, via formation) that can be applied across all layers. The same manufacturing processes used for planar circuits are extended to the three-dimensional stacked configuration, maintaining ease of manufacture through process standardization while achieving high-frequency performance reliability.
3Manufacturing precision
If inductor and capacitor elements are integrated in multilayer structure, then frequency selectivity is improved, but device complexity increases
Solution Approach 1:
The inductor and capacitor elements are segregated into different dielectric layers rather than being integrated in a single plane. The inductor resides in the first dielectric layer while the capacitor is formed in the second dielectric layer. This vertical segmentation improves frequency precision by reducing parasitic coupling between inductive and capacitive elements, while the modular layer structure keeps device complexity manageable through clear functional separation.
Solution Approach 2:
The patent utilizes the vertical dimension to separate inductor and capacitor elements that would otherwise occupy the same planar space. By stacking dielectric layers, the design achieves enhanced frequency selectivity through reduced electromagnetic interference between reactive elements, while maintaining compact form factor. The dimensional transition transforms a potentially complex planar integration problem into a simpler vertical stacking arrangement.
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. The multilayer filter may include an inductor including a conductive layer formed over a first dielectric layer.
Implementation Method 2
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.