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Design and Optimization of a Superconducting Contiguous Diplexer Comprising Doubly Terminated Filters

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8 Author(s)
Yong Heng ; Dept. of Phys., Tsinghua Univ., Beijing, China ; Xubo Guo ; Bisong Cao ; Bin Wei
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This paper presents a simple and efficient method for the design of a microstrip contiguous diplexer comprising doubly terminated filters. The equivalent circuit for the channel filters is presented, which can accurately represent both the in-band and out-of-band characteristics of the channel filters. By analyzing and properly adjusting the input impedance of the channel filters, the equivalent circuit of the diplexer can be easily optimized. A high-temperature superconducting diplexer at S-band is successfully designed with this method and fabricated on a MgO substrate with a compact size of 32.6 mm × 18 mm. The measured results show high performance and agree well with the simulations.

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Applied Superconductivity, IEEE Transactions on  (Volume:23 ,  Issue: 4 )