How to solve the dustproof problem of RF coaxial switch?
We know that RF coaxial switches have a wide range of uses in RF/microwave systems, such as time multiplexers, time division channel selection, pulse modulation, transceiver switches, beam adjustment, etc.
At present, the RF input interface and the RF output interface of most RF coaxial switches are fixed on the same side, resulting in complicated connection cables between the RF input interface and the RF output interface, which occupy a large space and small operating space. And the contact between the inner conductor of the radio frequency input interface and the radio frequency output interface and the radio frequency reed is surface-to-surface or point-to-face contact, and the contact position between the inner conductor and the radio frequency reed is always fixed. When there is pollution between the inner conductor and the contact of the radio frequency reed, It will increase the contact resistance, poor contact, and product failure, and the consequences can be imagined.
Apart from adding better dust protection on the outside, is there any better way to improve this situation? The best way to estimate is to start from the design, and this specific requirement must be considered in the design.
The improvement plan for this problem currently seen is: to design a Y-type single-pole double-throw RF coaxial switch, including an electromagnetic system, a radio frequency system, a radio frequency input interface connected to the radio frequency system, and two radio frequency output interfaces; The interfaces are respectively arranged on both sides of the radio frequency system so that the connecting cables between the interfaces are simple, the space is compact, and the operation space is large; The inner conductor can rotate circumferentially in the outer conductor. When the radio frequency reed presses down on the cylindrical inner conductor, the cylindrical inner conductor will rotate at a small angle, so that the cylindrical inner conductor has a self-cleaning effect and a strong anti-pollution ability, ensuring Effective contact between the cylindrical inner conductor and the RF reed.
This improvement plan has a certain cost, but for a better final effect, continuous improvement of the product is necessary. The development of the RF industry is inseparable from small continuous improvements, which can ultimately improve the level and progress of the entire industry.