Properties Good Performance of RT/duroid® 5870 Microwave Laminate in a Cryogenic Stripline Application at NASA
RT/duroid® 5870 laminate was evaluated as a stripline (triplate) transmission medium for use at cryogenic temperatures by workers at NASA-Langley Research Center, Hampton Virginia. Microwave signals in the 8 to 40 GHz frequency range were to be transmitted into a 4°K cryostat for amplification by an ultra low noise amplifier consisting of tantalum and lead elements deposited onto quartz substrate by electron beam plating.
Specimens of copper clad RT/duroid 5870 laminate 1 cm wide and 50 cm long were cycled repeatedly be-tween 2.4°K and 290°K (17°C) by immersion in liquid helium. Adhesion of the copper foil remained sound. The electrical length changed very little. The material became “somewhat brittle” at the low temperature, as would be expected. The insignificant change in electrical length over the temperature range of concern indicates an interesting balance of thermal behavior. The increase of dielectric constant due to increasing density with cooling is offset by the decrease in length of the transmission line due to the linear thermal coefficient of expansion in that direction. We have observed that PTFE composites of the RT/duroid 5870 type with low volume fraction of highly oriented microfiber reinforcement, show reduced ability of the oriented fiber to direct the volume change toward the Z direction at low temperatures.
|
|
|
|
Application note & Design Guide |
|
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
|
|
|
|
English Chinese Chinese and English Japanese |
|
|
2017/08/02 |
|
|
Revised 1154 |
|
|
Publication #92-281 |
|
|
52 KB |
- +1 Like
- Add to Favorites
Recommend
- Rogers Announces Acquisition of Silicone Engineering
- Sekorm Became an Authorized Distributor of Rogers
- ROGERS Provides Various of Circuit Laminates in Reliable PTFE, Creating Possibilities for Improved Performance
- Rogers Announces Termination of Merger Agreement with DuPont
- Rogers‘ Advanced Laminates Power The Mars Exploration of NASA
- Rogers Corporation Introduces New Water-Resistant Flexible Heater Substrate
- Rogers‘ Micro Channel Coolers (MCC) in High Performance Computing (HPC) Applications
- Air Cooled VCSEL Applications with Rogers Micro-Channel-Coolers (MCC)
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
