CPPA contractual framework

Posted by Alvaro Real
On January 4, 2021
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The CPPA (Coordinated Parts Procurement Agency) is responsible for the engineering, testing and procurement of the EEE parts of a certain space mission. This structure has a dedicated contractual framework designed for the Users´ benefits

Accurate Inductor Loss Determination

Posted by doEEEt Media Group
On December 10, 2020
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Magnetic loss occurs from the core and the windings in the storage/coupled Inductor. Determination of inductor power loss accurately has become more important to design reliable and efficient systems

Insertion loss and filter capacitor performance

Posted by doEEEt Media Group
On November 27, 2020
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Capacitors are used in both analog and digital circuits to remove unwanted signals. The filtering performance of a capacitor or filtering circuit is commonly described in terms of insertion loss. Some of the factors that significantly affect the insertion loss performance of a filtering circuit include configuration of the filtering elements, impedance, and load current.

Steps to Procurement of Electronic Components

Posted by Manuel Padial Pérez
On November 20, 2020
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Satellites with ESA as end customer and a prime contractor. This is a procurement approach where the agent receives the purchase orders for parts from various parts users, extracts and compiles the total need quantities per type and manufacturer, along with the necessary attrition (including DPA, LAT or QCI and radiation samples) and places the purchase orders at the corresponding manufacturers. Upon receipt of the flight parts by the CPPA, the ordered parts quantities will be tested as required and shipped to the individual users. The main features of the co-ordinated procurement are:

How to Use a Ferrite Bead to Reduce EMI

Posted by doEEEt Media Group
On November 5, 2020
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Ferrite beads protect PCB from EMI, by attenuating a specific band of high frequencies, or acting as an LC filter when combined with a capacitor, or separating ground and power planes.

Inductance, Impedance, SFR and Losses in Inductors

Posted by Tomáš Zedníček
On October 4, 2020
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Inductance L Not only magnetic materials possess a magnetic field, but every current carrying conductor also creates a magnetic field itself. Energy can be temporarily stored in the magnetic field. This effect is technically exploited in coils, consisting of one or more wire windings. The synonymous term “inductor” has become established.

Feedthrough capacitors technology and applications

Posted by doEEEt Media Group
On October 3, 2020
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One of the factors that greatly determine the performance characteristics of a capacitor is its geometry. The geometry of a typical feedthrough a capacitor differs from that of conventional capacitors. It is this structural difference that gives them their outstandingly good insertion loss characteristics. This low insertion loss is due to a design that ensures that the ground terminal side has zero residual inductance.

New Planar X Series of RF Filters

Posted by doEEEt Media Group
On September 28, 2020
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Smiths Interconnect has introduced its new Planar X Series of RF filter solutions with bandpass, bandstop, lowpass and highpass configurations up to 18 GHz (Ku Band).

Insertion-loss measurements of ferrite absorber sheets

Posted by doEEEt Media Group
On September 27, 2020
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The development of stealth aircraft brought about the use of ferrite absorber sheets, which have proven useful for damping cavity resonances at microwave frequencies. Since then, ferrite absorber sheets have become useful at mitigating EMI

What is COTS in the space industry?

Posted by doEEEt Media Group
On August 11, 2020
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The drive to use COTS (Commercial Off-The-Shelf) components in the space industry is growing since these parts allow to obtain higher performance at the system level, which is difficult to obtain using currently available space components. However, the use of COTS components has an inherent risk because of the lack of confidence in the traceability and the long-term performance of these parts as well as the new concerns affecting mostly this type of products (RoHS, counterfeit parts, long-term reliability, etc.).