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  2. Density meter - Wikipedia

    en.wikipedia.org/wiki/Density_meter

    Microwave density meters have various ways to measure what solids are in the sample. All microwave meters measure microwaves but some use different methods such as measuring the microwave propagation speed change, amplitude reduction, time of flight, single phase difference, or dual phase shift. Each technique has certain accuracies. [2]

  3. Microwave - Wikipedia

    en.wikipedia.org/wiki/Microwave

    Microwave is a form of electromagnetic radiation with wavelengths shorter than other radio waves but longer than infrared waves. Its wavelength ranges from about one meter to one millimeter, corresponding to frequencies between 300 MHz and 300 GHz, broadly construed.

  4. Microwave engineering - Wikipedia

    en.wikipedia.org/wiki/Microwave_Engineering

    Microwave engineering pertains to the study and design of microwave circuits, components, and systems. Fundamental principles are applied to analysis, design and measurement techniques in this field. The short wavelengths involved distinguish this discipline from electronic engineering. This is because there are different interactions with ...

  5. Microwave radiometer - Wikipedia

    en.wikipedia.org/wiki/Microwave_radiometer

    A microwave radiometer (MWR) is a radiometer that measures energy emitted at one millimeter-to-metre wavelengths (frequencies of 0.3–300 GHz) known as microwaves. Microwave radiometers are very sensitive receivers designed to measure thermally-emitted electromagnetic radiation. They are usually equipped with multiple receiving channels to ...

  6. Microwave oven - Wikipedia

    en.wikipedia.org/wiki/Microwave_oven

    The size of household microwave ovens can vary, but usually have an internal volume of around 20 liters (1,200 cu in; 0.71 cu ft), and external dimensions of approximately 45–60 cm (1 ft 6 in – 2 ft 0 in) wide, 35–40 cm (1 ft 2 in – 1 ft 4 in) deep and 25–35 cm (9.8 in – 1 ft 1.8 in) tall. [29]

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  8. Nicolson–Ross–Weir method - Wikipedia

    en.wikipedia.org/wiki/Nicolson–Ross–Weir_method

    Nicolson–Ross–Weir method is a measurement technique for determination of complex permittivities and permeabilities of material samples for microwave frequencies. The method is based on insertion of a material sample with a known thickness inside a waveguide , such as a coaxial cable or a rectangular waveguide, after which the dispersion ...

  9. Microwave transmission - Wikipedia

    en.wikipedia.org/wiki/Microwave_transmission

    Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay network. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter , but such systems are expensive and generally used only in ...

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