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Because of the high cost of waveguide runs, in many parabolic antennas the RF front end electronics of the receiver is located at the feed antenna, and the received signal is converted to a lower intermediate frequency (IF) so it can be conducted to the receiver through cheaper coaxial cable. This is called a low-noise block downconverter ...
Slotted array UHF television broadcasting antenna. As shown by H. G. Booker in 1946, from Babinet's principle in optics a slot in a metal plate or waveguide has the same radiation pattern as a driven rod antenna whose rod is the same shape as the slot, with the exception that the electric field and magnetic field directions are interchanged; the antenna is a magnetic dipole instead of an ...
In 1987, Amar Bose and William Short won the Inventor of the Year award from Intellectual Property Owners for the waveguide loudspeaker system. [3] [4] A model with a CD player was added in 1992. The "Acoustic Wave Music System II" was released in 2006 and added MP3 CD playback, a "Boselink" port and a headphone jack. This system was judged to ...
Diagram of a beam waveguide antenna from NASA, showing the signal path (red). A beam waveguide antenna is a particular type of antenna dish, at which waveguides are used to transmit the radio beam between the large steerable dish and the equipment for reception or transmission, like e.g. RF power amplifiers.
YouTube TV is an American Internet Protocol television service operated by YouTube, a subsidiary of Google, which in turn is a subsidiary of Alphabet Inc. Announced on February 28, 2017, [2] the virtual multichannel video programming distributor offers a selection of live linear channel feeds and on-demand content from more than 100 television networks (including affiliates of the Big Three ...
An acoustic waveguide is a physical structure for guiding sound waves. Sound in an acoustic waveguide behaves like electromagnetic waves on a transmission line. Waves on a string, like the ones in a tin can telephone, are a simple example of an acoustic waveguide. Another example are pressure waves in the pipes of an organ.