Pictures and sketches of the lossy microstrip filter (a) without and (b) with the Nb meander line and their respective housings.
(a) Drawing of a cross-sectional view of the assembled outer sample can and NbTi sample cell. (b) A picture of the filter block. (c) The assembled filter block within the sample vacuum can.
The power transmitted through the lossy microstrip filter into a 50 Ω load as a function of frequency, measured at room temperature (blue squares) and 4.2 K (red circles).
Filter response to a dc pulse. (a) Input pulse with a rise time of 360 ns. (b) Output pulse, in this case the rise time is 900 ns. For both figures the horizontal scale is 500 ps/div.
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