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1. A Differential Form of the Kramers-Kronig Relation for Determining a Lorentz-Type of Refractive Index
Topic: Electromagnetics
Published: 7/22/2015
Authors: Sung Kim, David R Novotny, Joshua A Gordon, Jeffrey R Guerrieri
Abstract: The integral forms of the Kramers-Kronig (KK) relations that relate the real and imaginary parts, n' and n", of a refractive index require the integral to be conducted over the full spectrum. In this paper, we derive a differential form of the KK rel ...

2. A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines"
Topic: Electromagnetics
Published: 12/1/2011
Authors: Eduard Rocas, Juan C. Collado Gomez, Jordi Mateu, Nathan D Orloff, James C Booth, Juan Manuel O'C allaghan
Abstract: "This work evaluates the microwave nonlinear properties and tuning at RF frequencies of ferroelectric Ba0.3Sr0.7TiO3 thin-films by on-wafer measurements of the second and third-order harmonics and intermodulation products of several coplanar transmis ...

3. A Low-Frequency Model for Radio-Frequency Absorber
Series: Journal of Research (NIST JRES)
Topic: Electromagnetics
Published: 6/1/1995
Author: James Paul Randa

4. A Reference Modulated Scatterer for ISO18000-6 UHF Tag Testing
Topic: Electromagnetics
Published: 11/15/2012
Authors: David R Novotny, Daniel G Kuester, Jeffrey R Guerrieri
Abstract: We present a method for measuring Ultra-High Frequency Radio-Frequency Identification (UHF RFID) tag differential RCS that has the potential for being easier and more accurate than current and proposed methods [1-2]. This method is based on accurate ...

Topic: Electromagnetics
Published: 10/26/2012
Authors: David R Novotny, Joshua A Gordon, Edwin J Heilweil, Brian C. Stillwell, Jeffrey R Guerrieri, Erich N Grossman, Shu Zee A. Lo
Abstract: Beginning the fall of 2012, NIST will be providing scattering measurements for other government agencies. We present performance results of a bi-directional scattering measurement system in the 200-500 GHz range. The goal is to provide dense-spectru ...

6. A frequency-bandgap waveguide controlled with metafilms composed of cubic particles
Topic: Electromagnetics
Published: 11/20/2012
Authors: Sung Kim, Christopher L Holloway, Michael D Janezic, Kendra L. Kumley, James R. Baker-Jarvis, Edward Kuester
Abstract: We present a rectangular S-band waveguide having electromagnetic bandgap properties (stopbands) controlled with sheets of metafilms composed of ceramic particles, in which we present both analytic and experimental results. Metafilms composed of TiO( ...

7. A geometric description of nonreciprocity in coupled two-mode systems
Topic: Electromagnetics
Published: 10/16/2014
Authors: Leonardo M. Ranzani, Jose Alberto Aumentado
Abstract: We explore the concept of nonreciprocity in coupled two-mode systems using a geometric mapping to the Poincaré sphere. From this perspective, we recast the requirements for nonreciprocity in terms of rotation and inversion symmetry arguments for t ...

8. Amplifier and Transistor Noise-Parameter Measurements
Topic: Electromagnetics
Published: 10/1/2014
Author: James Paul Randa
Abstract: Methods for measuring the noise parameters of amplifiers and on-wafer transistors are reviewed. After some preliminary background information and conventions, noise parameters are defined and the most common measurement strategies are presented, bot ...

9. Amplitude and phase-resolved nano-spectral imaging of surface phonon polaritons in hexagonal boron nitride
Topic: Electromagnetics
Published: 6/9/2015
Authors: Samuel Berweger, Shi Zhiwen, Hans A Bechtel, Sun Yinghui, Zeng Bo, Jin Chenhao, Chang Henry, Michael C. Martin, Markus B. Raschke, Feng Wang
Abstract: Phonon polaritons are quasiparticles resulting from strong coupling of photons with optical phonons. Excitation and control of these quasiparticles in 2D materials offer the opportunity to confine and transport light at the nanoscale. Here, we imag ...

10. Boundary Effects on the Determination of the Effective Parameters of a Metamaterial from Normal Incidence Reflection and Transmission
Topic: Electromagnetics
Published: 6/1/2011
Authors: Sung Kim, Edward E. Kuester, Christopher L Holloway, James R. Baker-Jarvis, Aaron D. Scher
Abstract: This paper presents a method for the determination of the effective electromagnetic parameters of a metamaterial, taking boundary effects at the interfaces between a conventional material and metamaterial into account. In the technique presented here ...

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