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First published by Ernest J. Wilkinson in 1960, [1] this circuit finds wide use in radio frequency communication systems utilizing multiple channels since the high degree of isolation between the output ports prevents crosstalk between the individual channels. It uses quarter wave transformers, which can be easily fabricated as quarter wave ...
QAM is a digital television standard using quadrature amplitude modulation. It is the format by which digital cable channels are encoded and transmitted via cable television providers. QAM is used in a variety of communications systems such as Dial-up modems and WiFi.
The genesis of the Fox Broadcasting Company took place through two 1985 transactions made by News Corporation, headed by Australian publishing magnate Rupert Murdoch.After a failed takeover of Warner Communications, Murdoch purchased a 50 percent interest in 20th Century-Fox Film Corporation (TCF) on March 20, 1985, for $250 million.
<p>2017 was a bad year for the pay TV industry. Cable and satellite providers saw <a href="http://bgr.com/2018/03/03/cord-cutting-records-best-streaming-service-cable ...
Stubs can be constructed with any type of transmission line: parallel conductor line (where they are called Lecher lines), coaxial cable, stripline, waveguide, and dielectric waveguide. Stub circuits can be designed using a Smith chart, a graphical tool which can determine what length line to use to obtain a desired reactance.
President-elect Donald Trump dismissed any suggestion that he’s being usurped by his high-profile billionaire ally Elon Musk during a speech at AmericaFest.
This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Ah, New Year’s Day. You can set goals at any time of year, of course, but the new year provides that extra rush of motivation.
The input impedance of an infinite line is equal to the characteristic impedance since the transmitted wave is never reflected back from the end. Equivalently: The characteristic impedance of a line is that impedance which, when terminating an arbitrary length of line at its output, produces an input impedance of equal value. This is so because ...