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Search Publications by: Nate Orloff (Fed)

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Displaying 76 - 100 of 159

Hybrid Characterization of Nanolitre Dielectric Fluids in a Single Microfluidic Channel up to 110 GHz Song

December 1, 2017
Author(s)
Nathan D. Orloff, Song Liu, James C. Booth, Dylan F. Williams, Dominec Schreurs, Bart Nauwelaers, Iija Oclet, Charles A. Little
In this work, we present a new “hybrid” method for dielectric measurements of nanolitre fluid samples on-wafer. The first part of the hybrid method is a technique which extracts the 4 complex permittivity of the microfluidic channel wall material. The

Characterization of Transmission Lines with Nonlinear Dielectric Materials

November 28, 2017
Author(s)
Aaron M. Hagerstrom, Christian J. Long, Nathan D. Orloff, James C. Booth, Eric J. Marksz
Nonlinear transmission lines are interesting for two broad reasons: first, they have several direct device applications (i.e. harmonic generation, and phase shifters), and second, they provide a way to characterize nonlinear materials at mm-wave

HIGH EFFICIENCY CARBON NANOTUBE THREAD ANTENNAS

November 3, 2017
Author(s)
Christopher L. Holloway, Aydin Babajgabni, Chris Long, David R. Novotny, Nate Orloff, E. A. Bengio, Damir Senic, Lauren W. Taylor, Dimitri E. Tsentalovich
Although previous research has explored the underlying theory of high-frequency behavior of carbon nanotubes (CNTs) and CNT bundles for antennas, there is a gap in the literature for direct experimental measurements of radiation efficiency. These

A Multistate Single-Connection Calibration for Microwave-Microfluidics

October 12, 2017
Author(s)
Xiao Ma, Charles A. Little, Chris Long, Jordi Mateu, James Booth, James Hwang, Nate Orloff
With emerging medical, chemical, and biological applications of microwave-microfluidic devices, many researchers desire a fast, accurate calibration that can be achieved in a single connection. However, traditional on-wafer or coaxial calibrations require

Temperature dependence of nonlinearity in high-speed, high-power photodetectors

September 30, 2017
Author(s)
Josue Davila-Rodriguez, Holly Leopardi, Tara Fortier, Xiaojun Xie, Joe C. Campbell, James Booth, Nate Orloff, Scott Diddams, Franklyn Quinlan
We present an experimental study of the nonlinearity of modified uni-traveling carrier (MUTC) photodiodes at cryogenic temperatures. At 120 K, the amplitudeto-phase (AM-to-PM) conversion nonlinearity is reduced by up to 10 dB, resulting in nearly 40 dB AM

Comprehensive circuit model of auto-limiting superconductor devices and systems

May 31, 2017
Author(s)
Jordi Mateu, C Collado, A Hueltes, D Garcia-Pastor, R Perera, Nikhil M. Joshi, Xifeng Lu, Nate Orloff, Jim Booth
This paper presents a phenomenological equivalent circuit to model the phenomenon occurring when a section of superconducting transmission line transits from the superconductor to the normal state. This phenomenon allows the use of superconductors for the

A Multireflect-Thru Method of Vector-Network-Analyzer Calibration

March 1, 2017
Author(s)
Arkadiusz Lewandowski, Wojciech Wiatr, Nate Orloff, James Booth
We present a new method for two-port vector-network-analyzer calibration which uses multiple offset-reflect standards and a flush thru connection. Offset-reflect standards consist of sections of the same uniform transmission-line with different lengths

Vector-Network-Analyzer Calibration Using Line and Multiple Coplanar-Waveguide Offset Reflects

December 9, 2016
Author(s)
Arkadiusz C. Lewandowski, Wojciech Wiatr, Dazhen Gu, Nate Orloff, Thomas Mitchell (Mitch) Wallis, Pavel Kabos
We present the application of our newly developed multi-reflect-thru technique to vector-network-analyzer calibration in the on-wafer environment. This technique uses a set of highly-reflective one-port devices, referred to as offset-reflects, and a single

New Methods for Series-Resistor Calibrations on Lossy Substrates up to 110 GHz

December 1, 2016
Author(s)
Liu Song, Nate Orloff, Song Liu, Charles A. Little, Xifeng Lu, James Booth, IIja Ocket, Arkadiusz Lewandowski, Dominique Schreurs, Bart Nauwelaers
We present two new methods to perform seriesresistor calibrations on lossy substrates. Lossless calibration substrates, which are required by the traditional calibration comparison technique, are not needed. The proposed methods rely on the multiline TRL

Giant surface conductivity enhancement in a carbon nanotube composite by ultraviolet light exposure

July 29, 2016
Author(s)
Christian J. Long, Nathan D. Orloff, Kevin A. Twedt, Thomas F. Lam, Luis Fernando Vargas Lara, Minhua Zhao, Bharath NMN Natarajan, Keana C. Scott, Eric Marksz, Tinh Nguyen, Jack F. Douglas, Jabez J. McClelland, Edward J. Garboczi, Jan Obrzut, James A. Liddle
Carbon nanotube composites are lightweight, multifunctional materials with readily adjustable mechanical and electrical properties—relevant to the aerospace, automotive, and sporting goods industries as high-performance building materials. Here, we combine

Cure temperature influences electrical properties via carbon nanotube-rich domain formation

July 27, 2016
Author(s)
Chelsea S. Davis, Nathan D. Orloff, Jeremiah W. Woodcock, Christian J. Long, Kevin A. Twedt, Bharath NMN Natarajan, Jonathan E. Seppala, Jabez J. McClelland, Jan Obrzut, James A. Liddle, Jeffrey W. Gilman
Carbon nanotube (CNT) nanocomposites are enticing materials that enable engineers to tailor structural and electrical properties for applications in the automotive and aerospace industries. CNT mass fraction and the matrix cure temperature are two ways to

Multiscale Metrologies for Process Optimization of Carbon Nanotube Polymer Composites

July 18, 2016
Author(s)
Bharath N. Natarajan, Nate Orloff, Rana N. Ashkar, Sagar Doshi, Kevin A. Twedt, Ajay Krishnamurthy, Chelsea S. Davis, Aaron M. Forster, Erik Thostenson, Jan Obrzut, Renu Sharma, James Alexander Liddle
Carbon nanotube (CNT) polymer composites are materials with attractive multifunctional properties that are becoming used in a growing range of commercial applications. With the increasing demand for these materials, it is imperative to develop methods for