US Patent 10079135 Gas-sealed stub tuner for microwave systems

A stub tuner apparatus includes a body portion having a first end and a second end and defining an internal space configured to carry electromagnetic energy. A gas-sealed pocket extends from the body portion such that, when the body portion forms a portion of a gas-sealed environment, the stub tuner apparatus is gas sealed. A stub is disposed in the gas-sealed pocket and the apparatus includes a linear translation means for moving the stub at least partially out from and into the pocket and at least partially into and out from the internal space without breaching the gas-sealed environment of the stub tuner apparatus.