Coaxial RF Switch Optoelectronic Indicator
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Solution Overview
Problem
Coaxial RF switches face reliability issues due to complex tuning and adjustment requirements for auxiliary contact pressure and contamination susceptibility in their indicator structures, making them difficult to manufacture and maintain.
Innovation Solution
An optoelectronic indicator system using a light-emitting diode (LED), a photo sensor, and a shutter assembly that interacts with the soft-iron rocker to indicate the state of RF channels, eliminating the need for auxiliary contacts and providing a sealed and reliable indication mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If auxiliary contact structures are used to indicate switch state, then indication function is provided, but contact pressure tuning complexity increases
Solution Approach 1:
The patent replaces the mechanical auxiliary contact system with an optoelectronic indication system. Instead of using moving and stationary contacts that require contact pressure tuning, the invention uses an LED and photodetector to detect the position of the rocker arm. The optical path is blocked or unblocked based on the rocker position, providing indication without mechanical contact pressure requirements.
2Ease of operation
If auxiliary contact structures interact with actuation mechanisms, then indication function is achieved, but sealed enclosure formation becomes difficult
Solution Approach 1:
The patent eliminates the need for the indicator to interact with moving mechanical parts by using an optical detection system. The photodetector detects the position of the rocker arm through optical path blocking, allowing the indicator to be isolated in a sealed enclosure while still functioning reliably.
3Ease of operation
If auxiliary contacts are used for indication, then switch state indication is provided, but manufacturing complexity increases
Solution Approach 1:
The patent replaces the complex auxiliary contact assembly with a simpler optoelectronic system consisting of an LED and photodetector. This substitution reduces the number of parts, simplifies assembly, and eliminates the need for precise mechanical alignment and contact pressure adjustment, thereby improving manufacturability.
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 optoelectronic indicator system simplifies manufacturing, enhances reliability by avoiding contact failures, and maintains a sealed environment, reducing contamination risks while accurately indicating RF channel states.
Implementation Method 1
a light-emitting diode (LED)
Implementation Method 2
a photo sensor
Data Source
AI summary
A coaxial RF switch optoelectronic indicator comprising a light-emitting diode (LED), a photo sensor, and a shutter assembly wherein the shutter assembly interacts with the soft-iron rocker in the switch and causes the optical path between the LED and photo-sensor to open or close, corresponding to the states (connected or disconnected) of an RF channel in the switch, providing an indicator means to the switch.