TY - JOUR
T1 - Design and Analysis of a Waveguide Structure for 211–275 GHz 2SB SIS Mixer
AU - Khudchenko, Andrey
AU - Tretyakov, Ivan
AU - Koshelets, Valery P.
AU - Hesper, Ronald
AU - Baryshev, Andrey M.
N1 - Publisher Copyright:
© 2023 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
PY - 2023/11
Y1 - 2023/11
N2 - We present an analysis of a waveguide structure for a 211–275 GHz sideband separating (2SB) mixer based on superconductor–insulator–superconductor (SIS) tunnel junctions. A general analytical model describing the quality of the sideband rejection ratio (SRR) is developed. It shows a crucial influence of reflections from single-ended mixers, reference frequency (RF) load, and the RF hybrid on the SRR level. Due to the intrinsic asymmetry of the 2SB waveguide structure, the reflections strongly affect both the balance of the observed signal and the balance of the local oscillator (LO) pumping signal. The model is verified and confirmed by 3-D electromagnetic simulations showing good qualitative and quantitative agreement. The developed theory gives a practical tool to design 2SB waveguide mixers with a required SRR level. Based on the presented theory, the waveguide structure of the 211–275 GHz 2SB SIS mixer is designed. It is predicted a degradation of the SRR level from 26 dB to about 18 dB due to reflections. The developed model explains some experimental data measured for 2SB SIS mixers developed earlier.
AB - We present an analysis of a waveguide structure for a 211–275 GHz sideband separating (2SB) mixer based on superconductor–insulator–superconductor (SIS) tunnel junctions. A general analytical model describing the quality of the sideband rejection ratio (SRR) is developed. It shows a crucial influence of reflections from single-ended mixers, reference frequency (RF) load, and the RF hybrid on the SRR level. Due to the intrinsic asymmetry of the 2SB waveguide structure, the reflections strongly affect both the balance of the observed signal and the balance of the local oscillator (LO) pumping signal. The model is verified and confirmed by 3-D electromagnetic simulations showing good qualitative and quantitative agreement. The developed theory gives a practical tool to design 2SB waveguide mixers with a required SRR level. Based on the presented theory, the waveguide structure of the 211–275 GHz 2SB SIS mixer is designed. It is predicted a degradation of the SRR level from 26 dB to about 18 dB due to reflections. The developed model explains some experimental data measured for 2SB SIS mixers developed earlier.
KW - Sideband rejection ratio (SRR)
KW - sideband separating (2SB) mixers
KW - submillimeter wave technology
KW - superconduct- or–insulator–superconductor (SIS) junctions
KW - terahertz receivers
UR - http://www.scopus.com/inward/record.url?scp=85168747988&partnerID=8YFLogxK
U2 - 10.1109/TTHZ.2023.3307595
DO - 10.1109/TTHZ.2023.3307595
M3 - Article
AN - SCOPUS:85168747988
SN - 2156-342X
VL - 13
SP - 645
EP - 653
JO - Ieee transactions on terahertz science and technology
JF - Ieee transactions on terahertz science and technology
IS - 6
ER -