From the Foreword: "This Counter-Unmanned Aircraft Systems (C-UAS) Technology Guide is intended to educate the national first responder community on C-UAS technology. In order to explain how C-UAS technologies operate, this guide provides an overview of small unmanned aircraft system technologies, including key components enabling their operation. The information provided in this guide includes technical, scientific and engineering expertise offered by NUSTL [National Urban Security Technology Laboratory] as well as information gathered from May to July 2018 from internet research, industry publications and manufacturer data."
CUAS-T-G-1; Counter-Unmanned Aircraft Systems Technology Guide 1
National Urban Security Technology Laboratory; DHS Science and Technology Directorate
U.S. Department of Homeland Security: https://www.dhs.gov/