Electromagnetic performance comparisons of 0.85 THz integrated bias-tee SIS mixers with twin-junction and end-loaded tuning schemes
Electromagnetic performance comparisons of 0.85 THz integrated bias-tee SIS mixers with twin-junction and end-loaded tuning schemes
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具有双结和端载调谐方案的 0.85 THz 集成偏置 T 型 SIS 混频器的电磁性能比较
DOI:
10.1117/12.2628733
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Tan B
中科院分区:
文献类型:
--
作者:
Tan B
We compare the design of two 0.85 THz SIS mixers fed with a radial probe antenna aligned to the E-Plane of the input full-height rectangular waveguide connected to a drilled smooth-walled horn. Both designs employ the same 0.5 µm2hybrid Nb/AlN/NbN tunnel junction technology, sandwiched between a NbTiN ground and aluminium wiring layer fabricated on top of a 40 µm quartz substrate. The two designs is differed by how we tune out the unwanted junction capacitance for broadband performance. The first design uses the commonly-used twin-junction tuning scheme; whilst the second design utilises an end-loaded scheme. We successfully achieve close to 2× the double sideband quantum noise performance for both schemes, but the twin-junction design is less sensitive to fabrication accuracy of planar circuit components utilised. However, the end-loaded design offers a much better IF bandwidth performance, almost twice wider than the twin-junction design. The need for an ultra-wide IF bandwidth mixer is becoming more pressing and important for the future and up-coming upgrades of various millimetre (mm) and sub-mm astronomical instruments, hence we conclude that the end-loaded design is a better solution for the THz heterodyne mixing applications.
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影响因子:
1.5
作者:
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通讯作者:
T. M. Klapwijk
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
B. K. Tan
通讯作者:
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影响因子:
3.2
作者:
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通讯作者:
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