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The magnetic detector or Marconi magnetic detector, sometimes called the "Maggie", was an early radio wave detector used in some of the first radio receivers to receive Morse code messages during the wireless telegraphy era around the turn of the 20th century.
The device that performed this function in the receiver circuit was called a detector. [1] A variety of different detector devices, such as the coherer, electrolytic detector, magnetic detector and the crystal detector, were used during the wireless telegraphy era until superseded by vacuum tube technology.
For articles related to systems or entire pieces of equipment used in radio communications networks, consider Category:Wireless. For example, articles about blocking and traffic theory used in trunked radio systems, base stations, AMPS, remote control consoles, or transmitter antenna combiners in two-way radio systems belong in the Wireless ...
The best shape for magnetic shields is thus a closed container surrounding the shielded volume. The effectiveness of this type of shielding depends on the material's permeability, which generally drops off at both very low magnetic field strengths and high field strengths where the material becomes saturated. Therefore, to achieve low residual ...
A near-field magnetic induction (NFMI) communication system is a short range wireless physical layer that communicates by coupling a tight, low-power, non-propagating magnetic field between devices. The concept is for a transmitter coil in one device to modulate a magnetic field which is measured by means of a receiver coil in another device.
In October 2008, RadioShack relaunched the ZipZaps line – this time, as XMODS Micro RC. Only the name was changed; all parts were backwards and forwards-compatible between ZipZaps (except the light features of the SE line) and XMODS Micro RC lines, and used the same chassis and controller of the regular ZipZaps line (as opposed to the more advanced features of the SE line).
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E-field projections on an orthogonal reference frame. Measurements of the EMF are obtained using an E-field sensor or H-field sensor which can be isotropic or mono-axial, active or passive. A mono-axial, omnidirectional probe is a device which senses the Electric (short dipole) or Magnetic field linearly polarized in a given direction.
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