Broadband tunable phase shifter for microwaves

Jinli Zhang (Corresponding Author), Tianyi Li, Roope Kokkoniemi, Chengyu Yan, Wei Liu, Matti Partanen, Kuan Yen Tan, Ming He, Lu Ji, Leif Grönberg, Mikko Möttönen

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
52 Downloads (Pure)


We implement a broadly tunable phase shifter for microwaves based on superconducting quantum interference devices (SQUIDs) and study it both experimentally and theoretically. At different frequencies, a unit transmission coefficient, |S21| = 1, can be theoretically achieved along a curve where the phase shift is controllable by the magnetic flux. The fabricated device consists of three equidistant SQUIDs interrupting a transmission line. We model each SQUID embedded at different positions along the transmission line with two parameters, capacitance and inductance, the values of which we extract from the experiments. In our experiments, the tunability of the phase shift varies from 0.07 × π to 0.14 × π radians along the full-transmission curve with the input frequency ranging from 6.00 GHz to 6.28 GHz. The reported measurements are in good agreement with simulations, which is promising for future design work of phase shifters for different applications.

Original languageEnglish
Article number065128
JournalAIP Advances
Issue number6
Publication statusPublished - 1 Jun 2020
MoE publication typeA1 Journal article-refereed


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