This letter presents a low-temperature superconductor (LTS)-based ${X}$ - and ${K}$ -band analog ultra-wideband phase shifters realized by coupling an array of radio-frequency superconducting quantum interference devices (rf-SQUIDs) to a microwave transmission line (TL). The proposed device is realized using MIT-LL SFQ5ee eight-layer niobium-based process. The device is designed by distributing 2256 rf-SQUIDs coupled throughout the line exhibiting experimental analog current-controlled phase shift of 130° and insertion loss variation of 0.46 ± 0.23 dB in ${X}$ -band at ${f} _{c}$ = 10 GHz. In the ${K}$ -band, a phase shift of 328° and insertion loss of 2.5 ± 1 dB in ${K}$ -band at ${f} _{c}$ = 22.5 GHz is observed. Theoretical analysis of the phase shifter is discussed.

中文翻译：

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使用 MIT-LL SFQ5ee 工艺的 X 和 K 波段基于约瑟夫森结的低温超导移相器

这封信介绍了一种基于低温超导体 (LTS) ${X}$- 和 ${K}$通过将射频超导量子干涉装置 (rf-SQUID) 阵列耦合到微波传输线 (TL) 实现的波段模拟超宽带移相器。所提出的设备是使用 MIT-LL SFQ5ee 八层铌工艺实现的。该器件是通过在整个线路中分布 2256 个 RF-SQUID 耦合设计的，具有 130° 的实验模拟电流控制相移和 0.46 ± 0.23 dB 的插入损耗变化。 ${X}$-乐队在 ${f} _{c}$= 10 GHz。在里面 ${K}$波段，相移为 328°，插入损耗为 2.5 ± 1 dB ${K}$-乐队在 ${f} _{c}$= 22.5 GHz 被观察到。讨论了移相器的理论分析。