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Questions related from Joerg Fricke
A rather low level question: In an experimental setup, an antenna has to be driven by a digital signal, amplified by two full bridges containing GaN FETs like Qorvo's QPD0020. As usual, the...
15 February 2024 7,196 3 View
Magnetic mirrors are well known in plasma physics. In order to work, the mean free path of the charge carriers has to be at least as long as the helical paths under the influence of the B field....
25 October 2020 8,428 3 View
The transformation of two "colliding" photons into a pair of particle / anti-particle was experimentally observed already. But the observed particles are always electrically charged. 1. If such a...
31 July 2019 1,921 18 View
Sprite satellites are just square printed circuit boards of 35 mm side length, carrying electronic components. During the last decade, there were some campaigns offering the launching of private...
02 June 2019 4,022 9 View
A plane (originally homogeneous) electromagnetic wave is transmitted through two transparent media with equal refractive indices but different values of impedance. The boundary between the media...
30 April 2017 9,915 12 View
A rather low level question but important in microwave laboratory setups: The HSMS-270 by Avago provided Rs = 0.65 Ohm, Cp = 0.08 pF, Cj = 6.7 pF @0V, 750 mA, 15 V, and carrier lifetime = 100 ps...
26 May 2016 2,555 5 View
For some years, optical E-field sensors (plus remote units) are commercially available; main advantage: the field is much less disturbed than by electrically conductive sensors. We would like to...
22 April 2016 3,965 5 View
