Force-Controlled RF Switch with Absorber Plate for Contact Bouncing
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Solution Overview
Problem
Existing radio-frequency switches exhibit contact bouncing during state changes, which can negatively influence high-frequency signal measurements.
Innovation Solution
A force-controlled-switch is designed with a diaphragm spring element and an absorber plate, where the absorber plate absorbs kinetic energy to dampen unwanted movement, and is constructed with a friction-stable material like Polyimide or PTFE for enhanced durability and dimensional stability, preventing interlock and allowing for a compact and efficient switching mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical switch is used for steering radio-frequency signals, then the switching function is achieved, but contact bouncing occurs which negatively influences the termination during switching
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping element that absorbs kinetic energy before the diaphragm spring element can bounce. The damping element is positioned to engage with the diaphragm spring element during switching, dissipating the kinetic energy that would otherwise cause contact bouncing and termination issues.
Solution Approach 2:
The patent converts the harmful kinetic energy of the diaphragm spring element into a beneficial damping effect. By allowing the diaphragm spring element to interact with the damping element, the previously harmful kinetic energy is dissipated through friction and deformation of the damping material, transforming the bouncing problem into a controlled energy dissipation mechanism.
2Reliability
If the absorber plate is made thicker to enhance damping, then kinetic energy absorption is improved, but the device size increases
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness of the absorber plate to a specific range (0.1-1 mm, preferably 0.4-0.7 mm). This parameter optimization provides sufficient damping performance while maintaining a compact device size. The specific thickness range balances kinetic energy absorption capability with space constraints.
Solution Approach 2:
The patent uses composite materials by selecting friction-stable materials such as Polyimide or PTFE for the absorber plate. These materials provide high damping performance per unit thickness due to their inherent friction stability and energy dissipation properties, allowing effective kinetic energy absorption with reduced plate thickness compared to conventional materials.
3Volume of moving object
If the absorber plate surface is made smaller to reduce size, then device compactness is improved, but interlock with helical-spring-recess may occur
Solution Approach 1:
The patent applies parameter changes by establishing a minimum surface area relationship between the absorber plate and the helical-spring-recess. The absorber plate surface is designed to be equal to or greater than the outer dimension of the helical-spring-recess, preventing interlock while maintaining compact dimensions. This geometric parameter relationship ensures reliable switching operation.
4Duration of action of stationary object
If friction-stable material is used for the absorber plate to enhance lifetime, then durability is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by selecting materials with specific friction stability properties (Polyimide or PTFE) that provide enhanced durability and dimensional stability under heat. These materials maintain their mechanical properties over extended operation cycles and temperature variations, significantly extending switch lifetime while managing manufacturing costs through optimized material selection.
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 solution effectively eliminates contact bouncing, ensuring precise and stable switching of high-frequency signals without significant influence on the signal, enhancing the reliability and longevity of the switch.
Implementation Method 1
The absorber-plate is configured to absorb kinetic energy of the force-controlled-switch, in particular a part of the diaphragm-spring-element's kinetic energy
Implementation Method 2
the arrangement of the absorber-plate in contact to the diaphragm-spring-element allows a significant damping of undesired movement caused by kinetic energy
Implementation Method 3
the absorber-plate is formed of a friction stable material, preferably of Polyimide or PTFE
Data Source
AI summary
A force-controlled-switch comprises a diaphragm spring element and an absorber-plate. The absorber-plate is configured to absorb kinetic energy of the force-controlled-switch. In particular, the absorber-plate absorbs a part of the diaphragm-spring-element's kinetic energy.