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Topic Area: Microwave Measurement Services

Displaying records 11 to 20 of 83 records.
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11. NISTeVerify: A fully electronic vector-network-analyzer verification system
Topic: Microwave Measurement Services
Published: 10/1/2009
Authors: Dylan F Williams, Arkadiusz C. (Arkadiusz) Lewandowski, Denis X LeGolvan, Ronald A Ginley
Abstract: The National Institute of Standards and Technology (NIST) has just introduced a fully electronic measurement verification system for microwave vector-network-analyzer (VNA) calibrations called NISTeVerify. The system allows you to quickly verify VNA ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902084

12. Wideband measurement of extreme impedance with a multistate reflectometer
Topic: Microwave Measurement Services
Published: 12/12/2008
Authors: Arkadiusz C. (Arkadiusz) Lewandowski, Denis X LeGolvan, Ronald A Ginley, Thomas M Wallis, Atif Imtiaz, Pavel Kabos
Abstract: Abstract: We present a technique for accurate wideband measurements of one-port devices with extreme impedances. Our technique uses a reflectometer with variable parameters (states) to obtain redundant measurements of the extreme impedance device. We ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900214

13. Recommended Terminology For Microwave Radiometry
Series: Technical Note (NIST TN)
Topic: Microwave Measurement Services
Published: 8/1/2008
Authors: James Paul Randa, Janne Lahtinen, Adriano Camps, A. Gasiewski, Martti Hallikainen, David Leine V, Manuel Martin-Neira, Jeff Piepmeier, Philip Rosenkranz, Christopher Ruf, James Shiue, Niels Skou
Abstract: We present recommended definitions for common terms in microwave remote-sensing radiometry. Terms are grouped into three chapters: General Terminology, Real-Aperture Radiometers, and Polarimetric Radiometry. AN alphabetical index lists the terms t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33079

14. Noise-parameter measurement with automated variable terminations
Topic: Microwave Measurement Services
Published: 6/8/2008
Authors: Dazhen Gu, David K Walker, James Paul Randa
Abstract: NIST has upgraded its measurement capability of noise parameters on low-noise amplifiers with a variable termination unit in the 1 to 12.4 GHz range. Such a unit allows improved time efficiency in the noise-temperature measurements used to de-embed n ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32879

15. SIMULATIONS OF NOISE-PARAMETER VERIFICATION USING CASCADE WITH ISOLATOR OR MISMATCHED TRANSMISSION LINE
Topic: Microwave Measurement Services
Published: 11/30/2007
Authors: James Paul Randa, Ken Wong, Roger Pollard
Abstract: Results are presented for simulations of a verification process for noise-parameter measurements. The verification process consists of first measuring separately both a passive device and the amplifier or transistor of interest (the DUT) and then mea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32814

16. NIST Microwave Scattering Parameter and Power Measurement Services
Topic: Microwave Measurement Services
Published: 9/30/2007
Author: Ronald A Ginley
Abstract: This paper describes the microwave scattering parameter (s-parameter) and power measurement services available at NIST. This includes what is measured in each of the services, the techniques used for both calibration of the systems and subsequent mea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32810

17. Microwave-Mixer Measurement with a Sampling Oscilloscope
Topic: Microwave Measurement Services
Published: 3/1/2006
Authors: Dylan F Williams, Hassen Khenissi, Fabien Ndagijimana, Catherine A Remley, Joel Dunsmore, Paul D Hale, Jack Wang, Tracy S. Clement
Abstract: We describe a straightforward method of separately characterizing up-conversion and down-conversion in microwave mixers with a sampling oscilloscope. The method mismatch-corrects the results, determines both magnitude and phase, and uses a novel time ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31966

18. Temperature Control of Microfluidic Systems by Microwave Heating
Topic: Microwave Measurement Services
Published: 5/5/2005
Authors: Siddarth Sundaresan, Brian J. Polk, Darwin R Reyes-Hernandez, M Rao, Michael Gaitan
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906336

19. Radiometer Measurements of a Near-Ambient, Variable-Temperature Noise Standard
Topic: Microwave Measurement Services
Published: 6/7/2004
Authors: George Free, James Paul Randa, Robert L Billinger
Abstract: A near-ambient, variable-temperature noise standard whose physical temperature can be accurately measured was constructed and then measured with the NIST total-power radiometer to test the accuracy of radiometer measurements in the temperature range ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31593

20. Expanding Definitions of Gain by Taking Harmonic Content into Account
Topic: Microwave Measurement Services
Published: 9/1/2003
Authors: Jeffrey A Jargon, Kuldip Gupta, Alessandro Cidronali, Donald C. DeGroot
Abstract: We expand the definitions of power gain, transducer gain, and available gain by taking harmonic content into account. Furthermore, we show that under special conditions, these expanded definitions of gain can be expressed in terms of nonlinear large- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30921