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FR-4 epoxy resin systems typically employ bromine, a halogen, to facilitate flame-resistant properties in FR-4 glass epoxy laminates. Some applications where thermal destruction of the material is a desirable trait [ citation needed ] will still use G-10 non flame resistant .
The Realistic DX-60 is a multiband radio. The radio receives 3 MHz to 27 MHz AM shortwave in three bands, 26.965 MHz through 27.405 MHz HF CB in one band, 540 kHz to 1620 kHz standard AM broadcast in one band, and 87 MHz to 108 MHz monaural standard broadcast FM. The DX-60 existed in two versions, model 12-764 and a nearly identical but ...
The site contains three towers, the tallest of which is a 55-metre-high civilian telecommunication tower owned by Télédiffusion de France. [1]: 01:48–01:55 In April 2013, the French interior intelligence agency DCRI pressured the president of Wikimedia France, Rémi Mathis, into deleting the French-language Wikipedia article about the station.
The Frontier Radio Multi Lingual (FR ML) is the newest addition to the FR family, and the first specifically targeting high throughput applications. With receive and transmit throughputs greater than 1 GBPs, FR ML was developed at the direction of NASA's Space Communications and Navigation Program , meant as a first step to replace the aging ...
Fire-retardant materials should not be confused with fire-resistant materials. A fire resistant material is one which is designed to resist burning and withstand heat . An example of a fire-resistant material is one which is used in bunker gear worn by firefighters to protect them from the flames of a burning building.
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[4] An antenna like effect is achieved by periodic swing of electrons from its capacitive element to the ground plane which behaves like an inductor. The authors further argued that the operation of a dielectric antenna resembles the antenna conceived by Marconi, the only difference is that inductive element is replaced by the dielectric ...
These materials are then both beneficial and practical as antenna ground planes, small flat signal processing filters, or filters as part of waveguide structures. For example, AMC surfaces as antenna ground planes are able to effectively attenuate undesirable wave fluctuations, or undulations, while producing good radiation patterns.