Questions & Answers on SATCOM

May 7, 2017

RF Devices in Satellite communication systems, including filters and multiplexers are subject to high RF power levels. These high power levels can lead to a unique nonlinear breakdown voltage phenomenon in a vacuum or near-vacuum environment called Multipaction. This effect can render a device useless and, thus degrades the reliability of the satellite. All high power devices that are used in spac...read more

CMOS RF/mmWave Technologies Enable the Transformation of IoT Satellite Communications

SATCOM

Cormac O'Sullivan

S3semi

The ongoing and predicted explosive growth in IoT is placing ever increasing demands on connectivity – a recent report by Ericsson predicts that there will be over 20 billion connected things in use globally by 2020. IoT networks rely primarily on Wi-Fi, LTE and, soon, 5G technologies, but satellite communications play an increasingly vital role in “filling in” gaps in coverage, complementing wire...read more

What is a Digital Channel Stacking Switch?

SATCOM

Answer

What are Low Earth Orbits (LEO)?

SATCOM Satellite

Editorial Team

Oct 7, 2018

Earth-centered orbits with an altitude of 200 to 2000 kms above the surface of Earth are called as Low Earth orbits (LEO). Objects in these orbitals have an orbital period (i.e. the time taken to orbit the Earth once) from 88 to 128 minutes. LEO satellites move at extremely fast speeds around the Earth.Low Earth Orbits are used by the International Space Station, the Hubble Space Telescope and mos...read more

What is a Geosynchronous Orbit?

SATCOM Satellite

Editorial Team

Oct 7, 2018

AGeosynchronous Orbit (GSO)is any orbit which has a period equal to the earth's rotational period. The Earth takes 23 hours, 56 minutes and 4.09 seconds to rotate on its axis and this is the time a satellite in a geosynchronous orbit takes to complete one round.Geosynchronous satellites are particularly useful for telecommunications and other remote sensing applications.Geostationary Orbitsfall in...read more

What is the Problem with Current Satellite Antenna Technology?

Antennas SATCOM

Answer

What are Block Up Converters?

SATCOM

Answer

What is the Advanced Extremely High Frequency (AEHF) Satellite System?

SATCOM Satellite

Editorial Team

Nov 10, 2018

The Advanced Extremely High-Frequency (AEHF) Satellite System is a series of six military communication satellites, operated by the United States Air Force Space Command, planned to replace the currently in-orbit Milstar satellite system. The throughput of these geostationary satellites will be ten times higher than that of the Milstar Satellites and provides increased coverage area.This satellite...read more

What is a Geostationary Orbit?

SATCOM Satellite

Editorial Team

Oct 7, 2018

A Geostationary Orbit (GEO) is a circular orbit, located directly above the earth's equator at an altitude of roughly 35,786 kilometers, with zero eccentricity and inclination. There is only one geostationary orbit - a belt circling the earth's equator. A satellite in a geostationary orbit seems to be stationary, when seen from the surface of the Earth, as it moves in the direction of Earth’s rota...read more

What is an Elliptical Orbit?

SATCOM Satellite

Editorial Team

Dec 2, 2018

When an object moves around another object in an oval shaped path, it is known to be revolving in an elliptical orbit. All planets move in elliptical orbits around the sun. The Moon also moves around earth in an elliptical orbit.While moving in an elliptical orbit, the velocity of the satellite varies based on its location in its orbital path. It moves fastest when it is closest to the Earth due t...read more

What is the Medium Earth Orbit (MEO)?

SATCOM Satellite

Editorial Team

Dec 4, 2018

The region of space in between the low Earth orbit and the geostationary orbit is called the Medium Earth Orbit (MEO). This orbit is at a distance of 2000 to 35786 kms from the earth's surface. This orbit is ideal for navigation and communication satellites.Some examples of satellites that operate from this orbit include GPS (Altitude of 20,200 kilometers), GLONASS (Altitude of 19,100 kilometers) ...read more

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