Abstract
We report on the 3rd intermodulation distortion (IMD3) characteristics of high-Tc superconducting (HTS) microstrip TM11-mode disk filters with conventional and proposed resonator-structures for 4GHz-band applications. The electromagnetic simulation results implied that the proposed structure had lower IMD3 than the conventional structures. The experimental filter sample designed with a center frequency (fC) of 4GHz and bandpass characteristic were prepared using YBCO films on the both sides of MgO(100) substrates. As the measurement results around 4GHz band, there is a temperature range for which the IMD3 is less than −50dBc at 10W input power.
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