Impedance-matched coplanar-waveguide metal-powder low-pass filters for cryogenic applications
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Summary
This summary is machine-generated.We developed novel metal-powder low-pass filters using coplanar waveguide design. These filters offer high attenuation and compactness, performing comparably to classical cryogenic filters.
Area Of Science
- Electrical Engineering
- Materials Science
- Physics
Background
- Cryogenic filters are essential for sensitive electronic systems operating at low temperatures.
- Traditional filters often face challenges with size, integration, and performance at cryogenic temperatures.
Purpose Of The Study
- To develop and characterize novel impedance-matched metal-powder low-pass filters based on coplanar waveguide design.
- To evaluate the performance of these filters at room temperature and 77.4 K.
Main Methods
- Fabrication of coplanar waveguide metal-powder (CPW-MP) filters.
- Characterization of filter performance, including return loss and attenuation, at room temperature and 77.4 K.
- Integration of CPW-MP filters with multipole LC filters to assess combined performance.
Main Results
- CPW-MP filters exhibit return loss better than 9.8 dB up to 10 GHz at 77.4 K.
- Filter attenuation scales linearly with frequency (29–220 dB/m) in the 1–5 GHz range at 77.4 K.
- Achieved total attenuation above 100 dB for a 1 m-long filter at frequencies above 2 GHz.
- Integrated filter demonstrated low cut-off frequency, >100 dB stop-band attenuation, and 590 dB/decade roll-off.
Conclusions
- The proposed CPW-MP filters are easily fabricated, thermally robust, and compact.
- They offer performance comparable to classical cryogenic filters and are flexible for integration.
- These filters present significant opportunities for miniaturization in cryogenic applications.
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