Thermal vacuum (TVAC) chambers are used by satellite manufacturers to test satellites and their subsystems and components in conditions mimicing space. In this environment, the test and measurement (T&M) components inside the chamber must perform reliably across the varying pressures and temperatures. Responding to this need, Maury Microwave developed StabilityTVAC™ cable assemblies, optimizing the mechanical and electrical design to provide accurate, reliable measurements, including stable phase.
Low outgassing is one of the requirements for T&M components inside the TVAC chamber. Outgassing occurs when the varying temperature and vacuum enable materials to release free volatiles that can deposit on other components and cause significant contamination. StabilityTVAC assemblies use low outgassing materials, meeting the requirements of ASTM E-595: a total mass loss under 1 percent and collected volatile condensable materials below 0.1 percent.
Changes in vacuum in the chamber force air in and out of the cable assemblies. Standard connectors require a slower change in pressure to avoid damage. StabilityTVAC cable assemblies use vented connectors, enabling the air to escape and the cable assembly to stabilize faster. This minimizes delays when testing with rapid pressurization/depressurization cycles.
Cable assemblies expand and contract over temperature, which changes the RF performance and can permanently degrade the cable assembly. StabilityTVAC assemblies are thermally conditioned to relieve mechanical stresses and ensure reliable performance over temperature.
Maury Microwave’s StabilityTVAC RF/microwave cable assemblies are available in both standard and high power, low loss versions. Connector choices for the standard series are 2.92 mm performing to 40 GHz, SMA connectors to 26.5 GHz, TNCA connectors to 18 GHz and Type N to 12.4 GHz. The high power, low loss versions are available with Type N or SMA connectors performing to 18 GHz and TNC connectors, to 12.4 GHz. Low-profile, reduced size and weight options are also available.
Maury Microwave
Ontario. Calif.
www.maurymw.com