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2. Waveguide (radio frequency) - Wikipedia

   en.wikipedia.org/wiki/Waveguide_(radio_frequency)

   In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. [1] This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave ...

3. Microwave - Wikipedia

   en.wikipedia.org/wiki/Microwave

   [14] [15] Apparatus and techniques may be described qualitatively as "microwave" when the wavelengths of signals are roughly the same as the dimensions of the circuit, so that lumped-element circuit theory is inaccurate, and instead distributed circuit elements and transmission-line theory are more useful methods for design and analysis.

4. RCA - Wikipedia

   en.wikipedia.org/wiki/RCA

   RCA was still profitable in 1983, when it switched manufacturing of its VHS VCRs from Panasonic to Hitachi. In 1984, RCA Broadcast Systems Division moved from the RCA Victor plant in Camden, New Jersey , to the site of the RCA antenna engineering facility in Gibbsboro, New Jersey .

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. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. 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]

8. D band (waveguide) - Wikipedia

   en.wikipedia.org/wiki/D_band_(waveguide)

   The waveguide D band is the range of radio frequencies from 110 GHz to 170 GHz in the electromagnetic spectrum, [1] [2] corresponding to the recommended frequency band of operation of the WR6 and WR7 waveguides. [3]

9. Crystal radio - Wikipedia

   en.wikipedia.org/wiki/Crystal_radio

   A family listening to a crystal radio in the 1920s Greenleaf Whittier Pickard's US Patent 836,531 "Means for receiving intelligence communicated by electric waves" diagram US Bureau of Standards 1922 Circular 120 "A simple homemade radio receiving outfit" taught Americans how to build a crystal radio.