At the beginning of 2015, around 1200 satellites were fully operational in orbit around the planet, half of which were communication satellites. This number of satellites is expected to expand at a progressive rate within the next years. In order ensure proper performance in the satellite transponders in the payload, on-orbit measurements must be made as a part of maintenance. This application note focuses on satellite post-launch or on-orbit measurements, and monitoring strategies used for satellite functionality checks when running maintenance routines.
Global Navigation Satellite System (GNSS) based solutions are highly accurate in most cases, but there are circumstances where they are not as effective, such as in dense urban environments with reduced satellite visibility or indoor areas with low signal levels. LTE Location Based Services (LBS) are designed to determine where a device is located to assist in its effectiveness. This Rohde & Schwarz white paper describes limitations of GNSS systems, as well as LTE cellular based alternatives within 3GPP Release 9.
Measuring and monitoring the signals in satellite communications systems is as complex as the tasks of those involved in operating such systems. Satellite operators are normally interested in ensuring that transponder use corresponds to the criteria agreed with users in terms of quality and scope, which also includes the detection of any interference signals. Teleport operators are concerned with making the best possible use of the resources with the communications systems, particularly the space segment. This Application Note describes example measurement principles that cover the above-mentioned applications and for which the NRA range of spectrum analyzers from Narda is particularly suitable.
The introduction of Gallium Nitride High Electron Mobility Transistors (GaN HEMT) in early 2000 has left an undeniable mark on the entire satellite communication landscape. It is now possible for the first time since the introduction of the Solid State Microwave Technology to design and manufacture Power Amplifiers that exceed by several orders of magnitude the reliability, linearity, power density and energy efficiency of all existing technologies, being GaAs, LDMOS, or TWT. By C. Damian, VP Product Line Management and Business Development, and D. Gelerman, President and CEO, Advantech Wireless Inc.
Owners of high throughput satellites are increasingly looking for new ways to increase throughput while maintaining or improving the cost per bit. A key limitation of current Ka-band systems is the simultaneous use of Ka-band for both revenue generating user links and backhaul feeder links. The 40 and 50 GHz bands provide opportunity to move commercial high throughput satellite feeder links out of Ka band, enabling full use of the Ka-band for users. By Hau Ho, Ronald Squires, and Christopher Brown, Northrop Grumman Aerospace Systems
ETL Systems, a global designer and manufacturer of Radio Frequency (RF) distribution equipment for satellite communications, has provided online global enterprise satellite monitoring service SatSignature with carrier monitoring switches.
NuWaves Engineering, an international Radio Frequency (RF) and Microwave solutions provider, announced recently that the company has been awarded a Phase I Small Business Innovation Research (SBIR) contract from the U.S. Air Force Research Laboratory (AFRL) to research and develop advanced RF cavity filters for use on Global Positioning System (GPS) III satellites.
Anritsu Company announces its MS2830A Spectrum Analyzer/Signal Analyzer is now compatible with the Monics satellite carrier monitoring system from SAT Corporation (SAT), a subsidiary of Kratos Defense & Security Solutions, Inc.
Swiss-based u‑blox, a global leader in cellular and positioning modules and integrated circuits, introduces the CAM-M8Q GPS/GLONASS/BeiDou/QZSS antenna module.
IBETOR, everis Aerospace and Defence’s specialist provider of satellite and wireless communications products and technology, recently announced that it will be showcasing its latest Sat-On-The-Move terminal, Ib-SOTM 100x, at Satellite 2014.
TECOM, part of the Smiths Microwave Business Unit, announces the introduction of its newest SATCOM product. The KaStream 5000, mounted in the tail of the aircraft, is part of the Ka-band VSAT solution for airborne in-flight connectivity. This airborne SATCOM product provides the industry with leading performance for VSAT.
ASC Signal Corporation has been selected by Newtec to provide over 50 satellite antennas across Europe.
LPKF Laser & Electronics has announced it will exhibit at the Satellite 2014 exhibition, which takes place March 11-13 at the Walter E. Washington Convention Center in Washington, D.C. LPKF provides in-house rapid PCB prototyping systems for a variety of applications and will demonstrate its best-selling system, the ProtoMat S63, in booth 8120.
MaxLinear Inc., a leading provider of integrated radio frequency (RF) and mixed-signal integrated circuits for broadband communications applications, recently announced satellite antenna and low-noise block downconverter (LNB) developer Pro Brand International Inc. (PBI) has selected the MxL865 Full-Spectrum Capture (FSC) system on chip (SoC) for a new direct broadcast satellite digital outdoor unit (D-ODU).
A Norwegian, satellite-based system aims to ensure that helicopters and light aircraft are prevented from colliding with power lines and other obstacles.
One of the World’s fastest growing Satellite Operators has chosen ETL Systems to provide the solution for handling incoming and outgoing signals for their 50 uplink (TX) and 50 downlink (RX) chains.
Nitronex LLC of Morrisville, NC, USA, which designs and makes gallium nitride on silicon (GaN-on-Si)-based RF power transistors for the defense, communications, broadband, and industrial markets, has launched the NPA1006, a 28V, 20MHz-1GHz, 15W broadband GaN amplifier with 14dB gain and 60% drain efficiency housed in an industry-standard 6mm by 5mm DFN plastic package.
Precision Devices Inc., a member of the Avrio Technology Group LLC, has announced the high temperature (to +90°C) VN01 and VN03 series of Oven Controlled Crystal Oscillators (OCXO).