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Search Publications by: Nicholas G. Paulter Jr. ()

Displaying 201 - 225 of 251

National Institute of Justice Standard for Hand-Held Metal Detectors for Use in Concealed Weapon and Contraband Detection

September 1, 2000

Author(s)

Nicholas G. Paulter Jr.

This document, NIJ Standard-0602.01, Hand-Held Metal Detectors for Use in Concealed Weapon and Contraband Detection, is an equipment standard developed by the Office of Law Enforcement Standards of the National Institute of Standards and Technology. It is

National Institute of Justice Standard for Walk-through Metal Detectors for Use in Concealed Weapon and Contraband Detection

September 1, 2000

Author(s)

Nicholas G. Paulter Jr.

The National Institute of Justice (NIJ) standard for walk-through metal detectors for use in concealed weapon detection was written in 1974. The NIJ standard has been rewritten to provide repeatable and reproducible test methods, improved detection

Temperature Effects on the High Speed Response of Digitizing Sampling Oscilloscopes

July 1, 2000

Author(s)

Donald R. Larson, Nicholas Paulter

We describe the effects of temperature on the performance of 20 GHz and 50 GHz digital sampling oscilloscopes and high speed pulse generators. The temperature of the sampling heads is varied through the manufacturer's specified minimum operating

Time-Base Setting Dependence of Pulse Parameters Using High-bandwidth Digital Sampling Oscilloscopes

July 1, 2000

Author(s)

Nicholas Paulter, Donald R. Larson

Errors in the time-base of digital sampling oscilloscopes (samplers) will cause errors in the reported pulse parameters of the sampler-acquired waveforms and will also contribute to the uncertainty estimate for these parameters. We present the results of

A Measurement System for Characterizing the Detection Performance of Metal Detectors: Design and Operation

June 1, 2000

Author(s)

Nicholas Paulter, Donald R. Larson, Jon R. Pratt

A measurement system for evaluating the performance of hand-held (HH) and walk-through (WT) metal detectors is described. These detectors produce time-varying magnetic fields that interact with objects comprised of electrically conductive and/or

Compact Photoconductive-based Sampling System with Electronic Sampling Delay

May 1, 2000

Author(s)

W. L. Cao, M. Du, C G. Lee, Nicholas Paulter

As electronic signals move to higher frequencies and wider bandwidths, there is need for new methods of measuring these bandwidths, there is need for new methods of measuring these high frequency/high speed (tens of Hgz and or high bit rate (tens of GBs

The Effect of Offset Voltage on the Kick-Out Pulses Used in the Nose-to-Nose Sampler Impulse Response Characterization Method

May 1, 2000

Author(s)

Donald R. Larson, Nicholas Paulter

The amplitude and bandwidth of kick-out pulses used in the nose-to-nose sampler impulse response characterization method were measured as a function of offset voltage. The amplitude is almost linear for offset voltages from -500 mV to 500 mV except for

Antenna-Coupled Niobium Bolometers for MM-Wave Imaging Arrays

November 1, 1999

Author(s)

Shalva Nolen, Jonathan A. Koch, Nicholas Paulter, Carl D. Reintsema, Erich N. Grossman

Antenna-coupled thin-film niobium microbolometers designed for mm-wave imaging arrays have been fabricated and their electrical properties measured. The niobium bolometers are operated at room temperature and are located at the feeds of half-wave dipole

An Accurate Method for Measuring the Dielectric Constant of Printed Wiring Board Materials

October 1, 1999

Author(s)

Nicholas G. Paulter Jr.

A Wide Bandwidth Printed Wiring Board Transmission Line Probe

March 1, 1999

Author(s)

Nicholas Paulter, Jon R. Pratt

An inexpensive, wide bandwidth, high cycle 50 ω probe is described for making electrical contact to printed wiring board planar transmission lines. The electrical transfer function of the probe and its contact repeatability are presented.

An Accurate Method for Measuring the Dielectric Constant of Printed Wiring Board Materials

March 1, 1999

Author(s)

Nicholas G. Paulter Jr.

A new time-domain reflectometry measurement method is described that provides accurate measurements of the average high frequency (0.1 GHz to 10 GHz) dielectric constant of printed wiring board materials and that is suitable for factory floor use. A

Long-term Repeatability of a TDR-based Printed Wiring Board Dielectric Constant Measurement System

December 1, 1998

Author(s)

Nicholas G. Paulter Jr.

Specific NIST Projects in Support of the NIJ Concealed Weapon Detection and Imaging Program

November 1, 1998

Author(s)

Nicholas G. Paulter Jr.

The Electricity Division of the National Institute of Standards and Technology is developing revised performance standards for hand-held (HH) and walk-through (WT) metal weapon detectors, test procedures and systems for these detectors, and a detection

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