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Search Publications by: Dan Kuester (Fed)

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Displaying 26 - 38 of 38

Testing Spectrum Sensing Networks by UAV

January 5, 2016
Author(s)
Dan Kuester, Ryan T. Jacobs, Yao Ma, Jason Coder
We consider here the use of hovering unmanned aerial vehicles (UAVs) to test spectrum sensing capabilities of Citizen's Broadband Radio Service (CBRS) systems at 3.5 GHz. Aircraft transmit synthesized LTE or pulsed radar modulation to excite spectrum

G-band micro-fabricated frequency-steered arrays with 2deg/GHz beam steering

July 17, 2013
Author(s)
Leonardo M. Ranzani, Daniel G. Kuester, Kenneth Vanhille, Anatoliy Boryssenko, Erich N. Grossman, Zoya Popovic
In this paper, we describe micro-fabricated frequency-scanned slot waveguide arrays operating between 130 and 180 GHz for planetary landing radar. The group delay dispersion of the feed line is increased by corrugating the bottom rectangular waveguide wall

A Reference Modulated Scatterer for ISO18000-6 UHF Tag Testing

November 15, 2012
Author(s)
David R. Novotny, Daniel G. Kuester, Jeffrey R. Guerrieri
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 accurately

Baseband Voltage and Power in Load-Modulated Digital Backscatter

November 15, 2012
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Zoya Popovic
Passive digital backscatter signals in systems like radio frequency identification (RFID) are usually received along with strong interference from a leaked carrier. The simplest way to quantify the “useful” communication signal is to separate an amplitude

Simple Test and Modeling of RFID Tag Backscatter

July 1, 2012
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Aniwar Ibrahim, Zoya Popovic
We consider here worst-case analysis of backscatter from passive radio frequency identification (RFID) tags. The basis is a figure of merit "B" to relate link power at reader ports to tag circuit parameters. A minimum bound for received monostatic

Testing Passive UHF Tag Performance Evolution

September 15, 2011
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Zoya Popovic
Trends in tag development since the introduction of the ISO 18000-6C and EPC Global standards are investigated empirically with measurements of power harvesting and backscattering performance from 20 samples of passive tags across 860-960MHz. The

Interference Tests for 900 MHz Frequency-Hopping Public-Safety Wireless Devices

August 15, 2011
Author(s)
Catherine A. Remley, Michael R. Souryal, William F. Young, Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri
We discuss free-field measurement methods designed to quantify interference between wireless devices such as RF identification systems and RF-based emergency beacons used by fire fighters. For public safety applications, standardized testing is important

Reference Modulation for Calibrated Measurements of Tag Backscatter

April 14, 2011
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Randy Direen, Zoya Popovic
We present a model and reference backscatter device for calibrating measurements of 860-960 MHz Ultra-High Fre- quency (UHF) tag backscattering. The model relates transmission to and backscattering from the device with a modulation depth calculable from

Reference Modulation for Calibrated Measurements of Tag Backscatter

April 12, 2011
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Randy Direen, Zoya Popovic
This paper presents an active antenna designed to modulate the scattering of an interrogating wave in the 860-960 MHz UHF RFID band. The device can be characterized with straightforward S- parameter measurements, and can then be used for characterization

Link Relationship Measurements in Load-Modulated UHF RFID

October 10, 2010
Author(s)
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri
This paper investigates the relative roles of the forward and reverse links in determining the operational range of passive UHF RFID systems. The relative importance the links are discussed first in the free field as a first-order model. We then present