TY - JOUR
T1 - A wideband terahertz high-T c superconducting Josephson-junction mixer
T2 - Electromagnetic design, analysis and characterization
AU - Gao, Xiang
AU - Zhang, Ting
AU - Du, Jia
AU - Weily, Andrew R.
AU - Guo, Yingjie Jay
AU - Foley, Cathy P.
N1 - Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/8/14
Y1 - 2017/8/14
N2 - This paper presents a wideband terahertz (THz) mixer based on a thin-film antenna-coupled high-temperature superconducting (HTS) YBa2Cu3O7-x (YBCO) step-edge Josephson junction. The HTS mixer enables the flexible harmonic mixing operation at multiple THz bands with the same microwave local oscillator (LO) source, and features very wide intermediate-frequency or instantaneous bandwidth. In order to optimize the frequency down-conversion performance of the mixer, systematic electromagnetic design and analysis have been carried out to improve the power coupling of THz radiation as well as wideband transmission of microwave signals. Experimental characterization of a fabricated device prototype has demonstrated that the mixer exhibits good performance at both the 200 GHz and 600 GHz bands. Detailed measurement results including the DC characteristics, LO pumping requirement, frequency response, mixing linearity and conversion gain are presented in this paper.
AB - This paper presents a wideband terahertz (THz) mixer based on a thin-film antenna-coupled high-temperature superconducting (HTS) YBa2Cu3O7-x (YBCO) step-edge Josephson junction. The HTS mixer enables the flexible harmonic mixing operation at multiple THz bands with the same microwave local oscillator (LO) source, and features very wide intermediate-frequency or instantaneous bandwidth. In order to optimize the frequency down-conversion performance of the mixer, systematic electromagnetic design and analysis have been carried out to improve the power coupling of THz radiation as well as wideband transmission of microwave signals. Experimental characterization of a fabricated device prototype has demonstrated that the mixer exhibits good performance at both the 200 GHz and 600 GHz bands. Detailed measurement results including the DC characteristics, LO pumping requirement, frequency response, mixing linearity and conversion gain are presented in this paper.
KW - Josephson-junction mixer
KW - electromagnetic design
KW - high-temperature superconductor
KW - terahertz communication
KW - wideband terahertz mixer
UR - http://www.scopus.com/inward/record.url?scp=85032811730&partnerID=8YFLogxK
U2 - 10.1088/1361-6668/aa7cc1
DO - 10.1088/1361-6668/aa7cc1
M3 - Article
AN - SCOPUS:85032811730
SN - 0953-2048
VL - 30
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 9
M1 - 095011
ER -