Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
68 (1996), S. 3034-3036
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have fabricated a microstrip three-pole bandpass filter with a fractional bandwidth of 5% at a center frequency of 10.5 GHz utilizing laser ablated high- Tc superconducting YBa2Cu3O7−δ thin films on LaAlO3 substrates. Microwave performance of the filter was carried out as a function of temperature. The filter exhibited low insertion losses of about 0.077 and 0.304 dB at 20 and 77 K, respectively. More than 15 dB in return losses was obtained at the same temperatures. Intermodulation distortion measurements were performed to evaluate power-handling capacity of the filter, which results from the nonlinear effects of surface resistance. Third-order intercept points were 68 dBm at 20 K and 58 dBm at 77 K. The nonlinear performance in the passband was also measured using a group delay method. The superconducting filter was compared with an equivalent gold filter which showed the insertion loss of more than 3.5 dB at 77 K. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.115568
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