Miniaturized high-temperature superconducting multiplexer with cascaded quadruplet structure

作者：Zhang Xu^*; Liu Jingping; Yan Shaolin; Fang Lan; Zhang Bo; Zhao Xinjie

来源：Superconductor Science and Technology, 2015, 28(6): 065016.

DOI：10.1088/0953-2048/28/6/065016

• superconducting triplexer
• common node
• six-channels multiplexer

In this paper, compact high temperature superconducting (HTS) multiplexers are presented for satellite communication applications. The first multiplexer consists of an input coupling node and three high-order bandpass filters, which is named triplexer. The node is realized by a loop microstrip line instead of conventional T-junction to eliminate the redundant susceptance due to combination of three filters. There are two eight-pole band-pass filters and one ten-pole bandpass filter with cascaded quadruplet structure for realizing high isolation. Moreover, the triplexer is extended to a multiplexer with six channels so as to verify the expansibility of the suggested approach. The triplexer is fabricated using double-sided YBa2Cu3O7 thin films on a 38 x 25 mm(2) LaAlO3 substrate. The experimental results, when compared with those ones from the T-junction multiplexer, show that our multiplexer has lower insertion loss, smaller sizes and higher isolation between any two channels. Also, good agreement has been achieved between simulations and measurements, which illustrate the effectiveness of our methods for the design of high performance HTS multiplexers.

• 出版日期2015-6
• 单位南开大学