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Topic Area: Electromagnetics

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31. COMPARISON OF EXPERIMENTAL TECHNIQUES FOR EVALUATING THE CORRECTION FACTOR OF A RECTANGULAR WAVEGUIDE MICROCALORIMETER
Topic: Electromagnetics
Published: 7/30/2010
Authors: Thomas P Crowley, Xiaohai Cui
Abstract: We have evaluated the correction factor of a WR-15 (50 to 75 GHz) rectangular waveguide calorimeter using four different techniques. The four methods are in agreement. Our initial uncertainty analysis indicates that the technique with the lowest unce ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904710

32. REFLECTIVITY STUDIES OF PASSIVE MICROWAVE CALIBRATION TARGETS AND ABSORPTIVE MATERIALS
Topic: Electromagnetics
Published: 7/30/2010
Authors: Dazhen Gu, Amanda Cox, Derek Anderson Houtz, David K Walker, James Paul Randa, Robert L Billinger
Abstract: We report the characterization of blackbody reflections as a part of the recent progress on the development of brightness standards for microwave remote sensing at National Institute of Standards and Technology (NIST).Three blackbody targets at varia ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906017

33. Impact of RF Interference between a Passive RFID System and a Frequency Hopping Communications System in the 900 MHz ISM Band
Topic: Electromagnetics
Published: 7/25/2010
Author: Michael R Souryal
Abstract: We present experimental measurements and analysis of RF interference between a passive RFID system and a generic frequency hopping communications system in the 902 928 MHz ISM radio band. Interference in both directions is considered, RFID to communi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904764

34. Characterization of Tissue-Equivalent Materials for High-Frequency Applications (200 MHz to 20 GHz)
Series: Technical Note (NIST TN)
Report Number: 1554
Topic: Electromagnetics
Published: 7/1/2010
Authors: James R. Baker-Jarvis, Sung Kim, Luke Leschallinger, Justin Johnson, Brad Givot
Abstract: The purpose of this report is to summarize the characterization of a number of high-frequency solid, liquid, and semisolid tissue-equivalent materials, from 200 MHz to 20 GHz. Carbon black and liquid mixtures were studied, but were found to be uns ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905167

35. Behavior of {epsilon} (omega} and tan {delta} of a Class of Low-Loss Materials
Topic: Electromagnetics
Published: 6/18/2010
Authors: James R. Baker-Jarvis, Michael D Janezic, Billy F Riddle, Kim Sung
Abstract: In this project we study the behavior of the permittivity and loss tangent of a class of materials that exhibit relaxation. For relaxation response we show that the permittivity is a monotonically decreasing function of frequency. Also, for many lo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904756

36. Simulator for Amplifier and Transistor Noise-Parameter Measurements
Topic: Electromagnetics
Published: 6/18/2010
Author: James Paul Randa
Abstract: This paper describes a simulation program that was developed to compare the uncertainties that would be expected with different measurement strategies for the noise parameters of connectorized amplifiers and of amplifiers or transistors on wafers. Bo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904927

37. High-Frequency Dielectric Measurements: A Tutorial
Topic: Electromagnetics
Published: 4/1/2010
Authors: James R. Baker-Jarvis, Michael D Janezic, Donald C. DeGroot
Abstract: KNOWLEDGE of the response of materials to electromagnetic (EM) fields in the frequency range of radio frequency (RF) through terahertz (THz) is critical to numerous research projects and electronic product development activities. Electromagnetic wave ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904207

38. Broadband Characterization of Individual Platinum Nanowires
Topic: Electromagnetics
Published: 3/7/2010
Authors: Kichul Kim, Thomas M Wallis, Paul Rice, Chin J. Chiang, Atif Imtiaz, Pavel Kabos, Dejan Filipovic
Abstract: Conductivity and contact resistance of 100 nm and 250 nm diameter platinum (Pt) nanowires (NWs) are investigated computationally and experimentally. Finite element method based full-wave modeling and circuit simulations are used in conjunction with m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903016

39. A Physical Explanation of Angle-Independent Behavior of Metafilms/Metasurfaces
Topic: Electromagnetics
Published: 1/6/2010
Authors: Joshua A Gordon, Christopher L Holloway
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904201

40. Progress Toward Corrugated Feed Horn Arrays in Silicon
Topic: Electromagnetics
Published: 12/16/2009
Authors: Joseph Wright Britton, Ki W. Yoon, James A Beall, Daniel T Becker, Hsiao-Mei Cho, Gene C Hilton, Michael D. Niemack, Kent D Irwin
Abstract: We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold coated stacks of micromac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903191



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