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  2. The best seed starting trays for jumpstarting your garden - AOL

    www.aol.com/news/best-seed-starting-trays...

    The seed-starting kit has two 24-cell seed starting trays with a propagation tray for watering, two germination dome covers which regulate temperature, a six-quart bag of seed starting soil mix, a ...

  3. Vivaldi antenna - Wikipedia

    en.wikipedia.org/wiki/Vivaldi_antenna

    A Vivaldi antenna or Vivaldi aerial [1] or tapered slot antenna [2] is a co-planar broadband-antenna, which can be made from a solid piece of sheet metal, a printed circuit board, or from a dielectric plate metalized on one or both sides. Patterned Vivaldi antenna, made from double-sided printed circuit board material

  4. Parabolic antenna - Wikipedia

    en.wikipedia.org/wiki/Parabolic_antenna

    Parabolic antennas are based on the geometrical property of the paraboloid that the paths FP 1 Q 1, FP 2 Q 2, FP 3 Q 3 are all the same length. Thus, a spherical wavefront emitted by a feed antenna at the dish's focus F will be reflected into an outgoing plane wave L travelling parallel to the dish's axis VF.

  5. Echo sounding - Wikipedia

    en.wikipedia.org/wiki/Echo_sounding

    Illustration of echo sounding using a multibeam echosounder. The MTVZA sounder received from the Meteor M2-2 satellite by an amateur station. Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water ().

  6. 10 of the best Trader Joe's products for a holiday party ...

    www.aol.com/10-best-trader-joes-products...

    Lighter Side. Medicare. News. Science & Tech. Shopping. Sports. Weather. 24/7 Help. ... Furman makes her own pumpkin hummus using one from Trader Joe's as a base. zi3000/Shutterstock

  7. Cassegrain antenna - Wikipedia

    en.wikipedia.org/wiki/Cassegrain_antenna

    A beam waveguide antenna is a type of complicated Cassegrain antenna with a long radio wave path to allow the feed electronics to be located at ground level. It is used in very large steerable radio telescopes and satellite ground antennas, where the feed electronics are too complicated and bulky, or requires too much maintenance and alterations, to locate on the dish; for example those using ...

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