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Short for Radio-Frequency. Frequencies at which radiation (intentional or not) plays a role. Typically associated with wireless communications, but also relevant for high-speed PCB design.

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Theremins did something like this for the volume control. The oscillator is shifted in frequency by the hand, and the output frequency is passed through a filter, and then diode rectified to create t …
answered Jul 6 '17 by user103218
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"Power amplifier" is a relative term. if the device will output enough power for your application, into the intended load, and not violate any conditions in the data sheet, the it's a "power amplifier …
answered Jun 27 '17 by user103218
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0answers
Take a six layer PCB with lots of circuitry, smaller than you'd like, parts on both sides, with very sensitive amplifiers looking for RF signals in the 100nV range, and digital circuitry. Top layer …
asked Jun 20 '17 by user103218
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mismatch results in a pretty trivial power loss. In some cases, RF transceiver chips will radiate high levels of harmonics and cut their output power if the mismatch is large enough. …
answered Feb 28 '17 by user103218
8
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4answers
I have a PCB with tracks of no controlled impedance. The longest track is shorter than 1/5000 of a wavelength. Does the impedance of the track even matter? If not, then at what length would I need t …
asked Jun 29 '17 by user103218
5
votes
within the passband of the filter. It's called "Slope detection". http://www.radio-electronics.com/info/rf-technology-design/fm-reception/fm-slope-detector-discriminator.php …
answered Jul 5 '17 by user103218