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2. YIG sphere - Wikipedia

   en.wikipedia.org/wiki/YIG_sphere

   Yttrium iron garnet spheres ( YIG spheres) serve as magnetically tunable filters and resonators for microwave frequencies. YIG filters are used for their high Q factors, typically between 100 and 200. [ 1][ 2] A sphere made from a single crystal of synthetic yttrium iron garnet acts as a resonator. The field from an electromagnet changes the ...

3. Sono arsenic filter - Wikipedia

   en.wikipedia.org/wiki/Sono_arsenic_filter

   Sono arsenic filter. The Sono arsenic filter was invented in 2006 by Abul Hussam, who is a chemistry professor at George Mason University (GMU) in Fairfax, Virginia. It was developed to deal with the problem of arsenic contamination of groundwater. [1] The filter is now in use in Hussam's native Bangladesh .

4. Omnidirectional antenna - Wikipedia

   en.wikipedia.org/wiki/Omnidirectional_antenna

   Omnidirectional antenna. In radio communication, an omnidirectional antenna is a class of antenna which radiates equal radio power in all directions perpendicular to an axis ( azimuthal directions), with power varying with angle to the axis ( elevation angle ), declining to zero on the axis. [ 1][ 2] When graphed in three dimensions (see graph ...

5. RF and microwave filter - Wikipedia

   en.wikipedia.org/wiki/RF_and_microwave_filter

   RF and microwave filter. Radio frequency (RF) and microwave filters represent a class of electronic filter, designed to operate on signals in the megahertz to gigahertz frequency ranges ( medium frequency to extremely high frequency ). It is component that is used in electronic systems to pass or reject specific frequencies and attenuate of ...

6. Frigidaire - Wikipedia

   en.wikipedia.org/wiki/Frigidaire

   Frigidaire refrigerator at the Hallwyl Museum 1922 Frigidaire "iceless" refrigerator newspaper ad. Frigidaire oven with "Division of General Motors" on the front. Frigidaire also produces a wide variety of refrigerators and freezers for the consumer market. Their model line-up includes refrigerator freezer units of several different types.

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   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.