Journal ArticleDOI
Low-loss micromachined inverted overlay CPW lines with wide impedance ranges and inherent airbridge connection capability
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TLDR
In this paper, a new type of overlay coplanar waveguide (CPW) structure, "inverted overlay CPW (IOCPW)" is developed using micromachining techniques to provide easy means of airbridge connection between the ground planes, as well as to achieve low losses over wide impedance ranges.Abstract:
A new type of overlay coplanar waveguide (CPW) structure, "inverted overlay CPW (IOCPW)" is developed using micromachining techniques to provide easy means of airbridge connection between the ground planes, as well as to achieve low losses over wide impedance ranges. Measured IOCPW showed less than 1 dB/cm loss at 50 GHz over a wide impedance range from 25 to 80 /spl Omega/. It also offered low effective dielectric constant, and insensitivity to the substrate losses. Wide impedance ranges and simple process steps make IOCPW a promising uniplanar transmission line medium for mm-wave monolithic applications.read more
Citations
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Journal ArticleDOI
Fabrication and characterization of aluminum airbridges for superconducting microwave circuits
Zijun Chen,A. Megrant,Julian Kelly,Rami Barends,J. Bochmann,Yu Chen,Benjamin Chiaro,Andrew Dunsworth,Evan Jeffrey,Josh Mutus,Peter O'Malley,Charles Neill,Pedram Roushan,Daniel Sank,Amit Vainsencher,James Wenner,Theodore White,Andrew Cleland,John M. Martinis +18 more
TL;DR: In this paper, the use of superconducting airbridges as a reliable method for preventing the propagation of these modes was proposed, and the authors measured the loss due to placing air bridges over coplanar waveguides lines.
Journal ArticleDOI
Low-loss analog and digital micromachined impedance tuners at the Ka-band
TL;DR: In this article, the authors presented new types of analog and digital micromachined impedance tuners, where the short-circuited shunt stubs are loaded with microelectromechanical system (MEMS) capacitive switches.
Journal ArticleDOI
Low-loss coplanar waveguides interconnects on low-resistivity silicon substrate
TL;DR: In this paper, the authors describe the fabrication, characterization and simulation of low-loss coplanar waveguide (CPW) interconnects on low-resistivity silicon substrate.
Journal ArticleDOI
A method for building low loss multi-layer wiring for superconducting microwave devices
Andrew Dunsworth,Rami Barends,Yu Chen,Zijun Chen,Ben Chiaro,Austin G. Fowler,Brooks Foxen,Evan Jeffrey,Julian Kelly,Paul V. Klimov,E. Lucero,Josh Mutus,Matthew Neeley,Charles Neill,Chris Quintana,Pedram Roushan,Daniel Sank,Amit Vainsencher,James Wenner,Ted White,Hartmut Neven,John M. Martinis,John M. Martinis,Anthony Megrant +23 more
TL;DR: In this article, the structural benefits of inter-layer dielectrics during fabrication and mitigating the added capacitive loss were exploited to create freestanding aluminum vacuum gap crossovers (airbridges).
Journal ArticleDOI
Static Zero-Power-Consumption Coplanar Waveguide Embedded DC-to-RF Metal-Contact MEMS Switches in Two-Port and Three-Port Configuration
TL;DR: In this paper, two-port single-pole-single-throw (SPST) and three-port SPMDT (SPDT) T-junction switches with four mechanically stable states are presented.
References
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Journal ArticleDOI
Considerations in the Use of Coplanar Waveguide for Millimeter-Wave Integrated Circuits
TL;DR: In this paper, the authors compared the performance of coplanar waveguide (CPW) transmission line with microstrip in terms of conductor loss, dispersion, and radiation into parasitic modes.
Journal ArticleDOI
High performance microshield line components
TL;DR: In this article, the authors examined the conductor loss and effective dielectric constant of microshield lines and presented results on transitions to conventional coplanar waveguide, right-angle bends, different stub configurations, and lowpass and bandpass filters.
Journal ArticleDOI
112-GHz, 157-GHz, and 180-GHz InP HEMT traveling-wave amplifiers
B. Agarwal,A.E. Schmitz,J.J. Brown,Mehran Matloubian,M. Case,M. V. Le,M. Lui,Mark J. W. Rodwell +7 more
TL;DR: In this paper, traveling-wave amplifiers having 1-112 GHz bandwidth with 7 dB gain, and 1-157 GHz frequency band with 5 dB gain were reported, and the amplifiers were fabricated in a 0.1/spl mu/m gate length InGaAs/InAlAs HEMT MIMIC technology.
Journal ArticleDOI
DC - 725 GHz sampling circuits and subpicosecond nonlinear transmission lines using elevated coplanar waveguide
TL;DR: In this paper, nonlinear transmission lines (NLTL's) fabricated with Schottky diodes on GaAs were used to electrically generate 3.7-V step functions that had a measured 10%-90% fall time of 0.68 ps.
Journal ArticleDOI
A very small, low-loss MMIC rat-race hybrid using elevated coplanar waveguides
TL;DR: In this paper, a very small, low-loss monolithic microwave IC (MMIC) rat-race hybrid using elevated coplanar waveguides is proposed, which requires less than half the area used when constructing miniaturized MMIC hybrids from thin-film microstrip lines.