TM Mode Dielectric Filter Elastic Flap Pressure Distribution
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Solution Overview
Problem
Current transverse magnetic (TM) mode dielectric filters face challenges in maintaining stable electrical performance due to complex and costly electroplating processes, non-uniform current distribution, and high precision requirements for elastic components, which affect intermodulation performance and long-term reliability.
Innovation Solution
A TM mode dielectric filter design where the main cover adheres to the enclosure and dielectric resonator, with an elastic component on the outer surface providing uniform pressure through multiple evenly distributed elastic flaps, eliminating the need for electroplating and reducing precision requirements, ensuring stable and uniform current distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an elastic component is disposed inside the cavity to secure the dielectric resonator, then the dielectric resonator can be secured, but the elastic component needs to be electroplated causing complex process and high processing costs
Solution Approach 1:
The elastic component is extracted from the cavity interior and relocated to the outer surface of the main cover. This extraction eliminates the need for electroplating the elastic component while maintaining its securing function, thereby simplifying the manufacturing process and reducing costs.
Solution Approach 2:
The main cover serves as an intermediary structure that transfers the elastic force from the elastic component (located on its outer surface) to the dielectric resonator. This mediator approach allows the elastic component to remain outside the cavity while still providing the necessary securing force.
2Reliability
If an elastic component is bent to produce elastic force, then the dielectric resonator can be secured, but non-uniform current distribution occurs affecting electrical performance
Solution Approach 1:
The elastic component is divided into multiple elastic flaps (first elastic flap, second elastic flap, etc.) that are evenly distributed around the dielectric resonator. Each flap provides localized elastic force, and their combined effect creates uniform pressure distribution, preventing non-uniform current distribution and maintaining electrical performance.
Solution Approach 2:
The elastic flaps are positioned at different locations (front, rear, left, right sides) of the dielectric resonator, creating a symmetric distribution pattern that ensures uniform force application from all directions, thereby maintaining current distribution uniformity.
3Reliability
If high-precision fitting is required between elastic component and cavity/main cover/dielectric, then the dielectric resonator can be securely held, but processing and assembly difficulty increases
Solution Approach 1:
The elastic component is extracted from the precision-critical cavity environment and positioned on the outer surface of the main cover. This eliminates the need for high-precision fitting between the elastic component and the cavity, significantly simplifying processing and assembly operations.
Solution Approach 2:
The main cover acts as a mediator that provides a mounting surface for the elastic component. The elastic component is secured to the main cover with lower precision requirements, and the main cover itself ensures the precise positioning and uniform force distribution to the dielectric resonator.
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 enhances intermodulation performance, reduces processing costs, and ensures long-term stability by distributing pressure uniformly, preventing dielectric resonator damage from improper pressure and temperature changes.
Implementation Method 1
an elastic component, such as a gasket or a thin cover, that produces an elastic acting force on the dielectric resonator
Data Source
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AI summary
A transverse magnetic (TM) mode dielectric filter includes an enclosure, a dielectric resonator, a main cover, and an elastic component, where the dielectric resonator is disposed in a resonant cavity of the enclosure; the main cover is secured between the elastic component and an open end of the enclosure; the elastic component includes multiple elastic flaps; the multiple elastic flaps are evenly distributed around an axial direction of the dielectric resonator; one end of each of the elastic flaps is fixedly connected to the main cover, and free ends of the elastic flaps elastically act on a central part of an outer surface of the main cover, to provide an elastic force towards the dielectric resonator. The evenly distributed multiple elastic flaps produce a pressure towards the dielectric resonator so that a uniform and stable pressure is produced around the dielectric resonator, to ensure a uniform current density inside the resonant cavity. In this way, intermodulation performance can be greatly improved and kept stable in a long term; the main cover fits with the enclosure and the dielectric resonator in an adhering manner; and the elastic component is disposed on the outer surface of the main cover, the elastic component does not need to be electroplated, and high precision is not required, thereby reducing processing costs.