Applying a direct current bias to superconducting microwave resonators by using superconducting quarter wavelength band stop filters

作者：Li Shao Xiong^*; Kycia J B

来源：Applied Physics Letters, 2013, 102(24): 242601.

DOI：10.1063/1.4808364

We have designed a superconducting quarter wavelength band stop filter which provides a high attenuation at approximately 7GHz. Such filters were used as dc bias lines applied to whole wavelength and half wavelength superconducting resonators at two different extremes: voltage node and voltage antinode. The results obtained indicate that this filter can apply dc bias to arbitrary length superconducting coplanar waveguide resonators while maintaining high quality factor, Q similar to 15 000 - 18 000.

• 出版日期2013-6-17