A superconducting millimetre switch with multiple nano-bridges
ISSTT 2014 - 25th International Sympsoium on Space Terahertz Technology, Proceedings (2014) 164-169
Abstract:
In this paper, we describe the design of a planar superconducting on/off switch comprising a high normal resistance nano-bridge deposited across a slotline transmission line. We present preliminary experimental results measured at 220 GHz range, and we discuss in detail the various parameters that affect the performance of the planar on/off switch, including the optimum thickness required for the nano-bridge to achieve high dynamic range and low transmission loss. The analysis is done by combining the accurate superconducting surface impedance description with rigorous electromagnetic simulations, and comparing the simulated results with the measured performance of a previously fabricated on/off switch fed by a backto- back unilateral finline taper. Finally, we propose an improved method to further increase the dynamic range of the switch, by introducing a multi-bridge design to tune out the residual inductance of the nano-bridges.Smooth walled feed horns for mm and submm radio astronomy
Institute of Electrical and Electronics Engineers (IEEE) (2013) 1-2
650 GHz SIS mixer fabricated on silicon鈥恛n鈥恑nsulator substrate
Electronics Letters Institution of Engineering and Technology (IET) 49:20 (2013) 1273-1275
Easy to Fabricate Feeds for Astronomical Receivers
Institute of Electrical and Electronics Engineers (IEEE) (2013) 15-18
Preliminary Measurement Results of a 650 GHz Planar Circuit Balanced SIS Mixer
IEEE Transactions on Terahertz Science and Technology Institute of Electrical and Electronics Engineers (IEEE) 3:1 (2013) 32-38