Mitigating Vacuum RF Multipaction in Space Systems

Posted by doEEEt Media Group
On February 22, 2023
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When developing mission-critical space applications such as low Earth orbit (LEO) satellites or equipment designed for Mars missions, there are special considerations you must make if you will be operating your RF circuits in a vacuum. This is because when the pressure in the vacuum is below 10-2 Torr, a potentially catastrophic phenomenon in RF circuits called multipaction is possible.

Space Entangled Photon Source

Entangled photon sources for quantum communications

Posted by Javier Alejandro de la Ossa Fernández
On December 14, 2022
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Quantum entanglement is one of the many non-intuitive features of quantum mechanics. If two photons of light are allowed to properly interact with each other, they can become entangled. Those two entangled photons can then be separated, but as soon as one of them interacts with the third particle, the other photon of the pair will change its quantum state instantaneously.

Optical Transceiver

Using optical transceiver technology within space vehicles

Posted by Javier Alejandro de la Ossa Fernández
On November 8, 2022
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Optical transceiver technology devices have shown an increase on performance and a reduction in SWaP (Size, Weight, and Power) by their inclusion in Very High Throughput Satellites (VHTS) payloads. To ensure their practical use in space applications, they need a compact package, low power consumption, and highly reliable.

ACTIVES, EEE Components

What is an optocoupler? Uses and benefits

Posted by Emilio Cano García
On February 23, 2022
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An optocoupler, also known as an optoisolator or photocoupler, is an electronic device made up of an LED emitter combined with a photodetector, separated from each other in proximity. There are many types of photodetectors, most of which are variations on a photodiode or phototransistor.

ACTIVES, EEE Components

Isolation in DC using phototransistor output optocouplers

Posted by Javier Alejandro de la Ossa Fernández
On February 22, 2022
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Optocouplers typically provide 2500 volts (rms) isolation, 1012 Ω insulation resistance, and less than a picofarad coupling between input and output. And optocouplers are available in many different packages and configurations.

EEE Components, PASSIVES

Current flow measurement using precision resistors, makes a lot of sense!

Posted by Javier Alejandro de la Ossa Fernández
On January 10, 2022
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Current-sensing techniques are intrusive, meaning that somehow they will affect the system performance. It’s usually necessary to insert “something” in the middle of the path that goes from the power source to the load through which the current that we need to monitor flows.

ACTIVES, EEE Components

Electrical characterization of 1.2kV SiC Schottky diode at a wide temperature range

Posted by Javier Alejandro de la Ossa Fernández
On November 29, 2021
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This article reports the results obtained from an electrical characterization under high temperatures (25°C and 100°C), where forward voltage and reserve current were monitored for a set of 130 devices. The optimization process for these devices reflects an excellent behavior in on mode and a right compromise in a reverse way for the chosen application.

ACTIVES, EEE Components

Prototyping a 1.2kV SiC Schottky diode for TWTAs

Posted by Javier Alejandro de la Ossa Fernández
On November 29, 2021
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The importance of SiC devices in the power electronics field and how this can be particularly useful in space applications. Also, we set the foundations for a SiC diode that complies with the optimized performances needed for the rectifier module in the next generation of EPCs for TWTAs.

ACTIVES, EEE Components, PASSIVES

Space-Qualified Crystals Oscillators from Q-Tech

Posted by doEEEt Media Group
On September 29, 2021
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Space-Qualified Crystals Oscillators0. The most significant growth in the crowded “Spacescape” is from the emergence of low-earth orbit (LEO) satellites, orbiting from 160 to 2,000 km above the earth’s surface.