المصدر: Telecommunications Reports. 6/14/2024, Vol. 90 Issue 11, p20-20. 1p.

مصطلحات موضوعية: *CONFERENCES & conventions, RADIO frequency allocation, RADIO wave propagation, RADIO frequency

مستخلص: The article discusses the International Symposium on Advanced Radio Technologies (ISART) hosted by the Institute for Telecommunication Sciences (ITS) that was held in in Denver, Colorado from June 10–13, 2024. Topics discussed include developing RF propagation models that consider foliage and buildings (clutter) to enhance spectrum policy and spectrum-dependent systems. Attendees included Shiva Goel from NTIA, Clare Allen from Ofcom, and Stéphane Gagnon from ISED Canada.

المؤلفون: STUHLFAUTH, REINER

المصدر: Microwaves & RF. 2023 Leaders In Microwaves, p5-11. 5p. 1 Color Photograph, 4 Diagrams.

مصطلحات موضوعية: *WIRELESS Internet, *RADIO wave propagation, *RADIO access networks, *WIRELESS communications, *TECHNOLOGICAL innovations

مستخلص: This document provides a concise overview of non-terrestrial network (NTN) technology from a 3GPP perspective. It explains that NTN in 5G includes various connection scenarios such as satellite-based communications and flight control of unmanned aerial vehicles. The document discusses the different network variations and studies conducted by 3GPP to enable NTN within the 5G system. It also highlights the use cases and spectrum aspects of NTN, as well as the relevant architectures for current and future NTN and satellite constellations. The goal of NTN is to provide global connectivity, particularly in underserved regions. The document also explores the characteristics and challenges of NTN in the context of 5G communications, including high-altitude platform systems (HAPS) and different NTN architectures. It addresses RF propagation aspects and challenges specific to NTN, such as path attenuation, round-trip time, Doppler frequency shift, and Faraday rotation. The document concludes by discussing the future evolution of wireless communications systems towards 6G. [Extracted from the article]

المؤلفون: ROBERTS, GETHIN WYN, HANCOCK, CRAIG M., XU TANG

المصدر: GPS World. Jan2019, Vol. 30 Issue 1, p28-35. 8p.

مصطلحات موضوعية: *PERFORMANCE evaluation, NOISE measurement, IONOSPHERIC radio wave propagation, RELIABILITY of artificial satellites, GLOBAL Positioning System, BEIDOU satellite navigation system, GALILEO satellite navigation system

مستخلص: The article discusses the methods for analyzing the range residual and ionospheric residual noise for five global navigation satellite system (GNSS) satellites so as to assess their signal quality performance and reliability, where satellites are Global Positioning System (GPS), BeiDou, Galileo, GLONASS and the Quasi-Zenith Satellite System (QZSS). The results of the study are presented in detail.

المؤلفون: Tolonen, Jani¹

المصدر: ECN: Electronic Component News. Nov/Dec2018, Vol. 62 Issue 8, p10-13. 4p.

مصطلحات موضوعية: *TESTING, *WIRELESS communications, *TELECOMMUNICATION satellites, *TELECOMMUNICATION, MEASURING instruments, RADIO wave propagation, RADIO technology

مستخلص: The article focuses on advances in radio channel emulators that extend the capabilities of emulators enabling the application in any kind of radio environment and multi-system testing within a single test run. Topics covered include role of channel emulators in enabling simultaneous testing of tactical radios and satellite links, use of a file-based channel emulation to ensure accuracy and repeatability of modern radio propagation emulation and challenges in testing wireless developments.

المؤلفون: ECKERT, CAMBRIE

المصدر: National Defense. Sep2023, Vol. 108 Issue 838, p6-6. 1p.

مصطلحات موضوعية: *REMOTE sensing, *RADIO wave propagation, *DETECTORS, *TEMPERATURE, *CLOUDINESS

مستخلص: The article summarizes the findings of a research team from John Hopkins Applied Physics Laboratory in Laurel, Maryland, who studied how climate change could impact radio wave propagation and degrade defense technologies such as communication systems navigation and surveillance radars. It discusses the implications and recommendations for future defense acquisition and innovation efforts. Also mentioned is the discovery on the possible impact of higher temperatures and increased humidity.

المؤلفون: Hindle, Patrick

المصدر: Microwave Journal. 2024 Special Issue, Vol. 67, p16-20. 3p.

مصطلحات موضوعية: *AWARDS, *BLOOD sugar monitors, *ELECTROMAGNETIC wave propagation, *CHANGE agents, *TECHNOLOGICAL innovations, *DIGITAL technology

مستخلص: The article offers information on Junkosha's second annual "Technology Innovator of the Year Award," highlighting its significance in recognizing innovative work in interventional medical procedures or microwave/mmWave technologies. Topics include the shortlisted candidates for the award, the evaluation process, and the prize awarded to the winners.

المؤلفون: BROWNE, JACK

المصدر: Microwaves & RF. Mar2018, Vol. 57 Issue 3, p34-37. 4p. 3 Color Photographs.

مصطلحات موضوعية: *ELECTROMAGNETIC waves, *RADIO wave propagation, *RADIO frequency, *MICROWAVES, *ANTENNAS (Electronics), *MILLIMETER waves

مستخلص: The article discusses the paths of the propagation of electromagnetic (EM) energy which is crucial for numerous radio frequency and microwave signal applications. It offers information on EM propagation which starts and ends with antennas such as dipoles and multiple antenna elements. Topics include the behavior of radiowaves, the importance of point source antenna in efficient EM propagation, and the use of millimeter waves.

المؤلفون: Scott, R.

المصدر: Journal of Electromagnetic Dominance. Jun2022, Vol. 45 Issue 6, p16-18. 2p.

مصطلحات موضوعية: *FRIGATES, *RADIO wave propagation, *FREQUENCY agility, *IONOSPHERIC techniques, *TECHNOLOGY assessment, *SHIPBUILDING

مستخلص: The article informs that the Next-Generation Dagaie System (NGDS) Safran S.A. trainable decoy launcher has been selected to equip Canada's next generation surface combatant. It further discusses selection of the NGDS for the 15-ship Canadian Surface Combatant (CSC) program; request for information (RFI) for offboard electronic countermeasures (OB ECM) munitions for CSC; and Safran has subsequently introduced alternative barrel module configurations.

المؤلفون: Drubin, Cliff

المصدر: Microwave Journal. Jun2022, Vol. 65 Issue 6, p35-36. 2p.

مصطلحات موضوعية: *IONOSPHERIC electron density, *RADIO wave propagation

مستخلص: The article offer news briefs associated with the defence industry. Topics discussed include development of a new approach to defeat adversaries by BAE Systems as part of the Complexity Modeling in Multiple Domains program, Ionospheric Insights to Enhance High Frequency Radio Capabilities by Defense Advanced Research Projects Agency and installation of the first Global Aircrew Strategic Network Terminal system for the U.S. Air Force by Raytheon Intelligence & Space.

المؤلفون: Brirkoetter, Tom¹

المصدر: Microwave Journal. Mar2017, Vol. 60 Issue 3, p98-106. 5p.

مصطلحات موضوعية: *MEASUREMENT of millimeter waves, *RADIO wave propagation, *5G networks, *PPP (Computer network protocol), *SPECTRUM allocation

مستخلص: The article looks at the key issues encountered with test systems for millimeter wave (mmWave) frequencies. It explores market segments that are adopting mmWave frequencies, including 5G, automotive radar, and point-to-point links, along with their design and test considerations. Among of the challenges of higher frequency transmission, driven by advancement of mmWave technology, are higher propagation loss, measurement repeatability, and field testing.