%0 Journal Article %T Impedance Matched Absorptive Thermal Blocking Filters %A E. J. Wollack %A D. T. Chuss %A K. Rostem %A K. U-Yen %J Physics %D 2014 %I arXiv %R 10.1063/1.4869038 %X We have designed, fabricated and characterized absorptive thermal blocking filters for cryogenic microwave applications. The transmission line filter's input characteristic impedance is designed to match $50\,\Omega$ and its response has been validated from 0-to-50\,GHz. The observed return loss in the 0-to-20\,GHz design band is greater than $20\,$dB and shows graceful degradation with frequency. Design considerations and equations are provided that enable this approach to be scaled and modified for use in other applications. %U http://arxiv.org/abs/1403.2909v1