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  2. Standing wave ratio - Wikipedia

    en.wikipedia.org/wiki/Standing_wave_ratio

    However the same 6:1 mismatch through 75 meters of RG-8A coax would incur 10.8 dB of loss at 146 MHz. [ 5 ] (pp19.4–19.6) Thus, a better match of the antenna to the feed line, that is, a lower SWR, becomes increasingly important with increasing frequency, even if the transmitter is able to accommodate the impedance seen (or an antenna tuner ...

  3. SWR meter - Wikipedia

    en.wikipedia.org/wiki/SWR_meter

    An SWR meter does not measure the actual impedance of a load (the resistance and reactance), but only the mismatch ratio. To measure the actual impedance requires an antenna analyzer or other similar RF measuring device. For accurate readings, the SWR meter itself must also match the line's impedance (typically 50 or 75 Ohms).

  4. Mismatch loss - Wikipedia

    en.wikipedia.org/wiki/Mismatch_loss

    Mismatch loss in transmission line theory is the amount of power expressed in decibels that will not be available on the output due to impedance mismatches and signal reflections. A transmission line that is properly terminated, that is, terminated with the same impedance as that of the characteristic impedance of the transmission line, will ...

  5. Antenna (radio) - Wikipedia

    en.wikipedia.org/wiki/Antenna_(radio)

    The loss resistance will generally affect the feedpoint impedance, adding to its resistive component. That resistance will consist of the sum of the radiation resistance R rad and the loss resistance R loss. If a current I is delivered to the terminals of an antenna, then a power of I 2 R rad will be radiated and a power of I 2 R loss will

  6. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    In a real directional coupler, however, the insertion loss consists of a combination of coupling loss, dielectric loss, conductor loss, and VSWR loss. Depending on the frequency range, coupling loss becomes less significant above 15 dB coupling where the other losses constitute the majority of the total loss.

  7. ENERGY SECURITY & EMERGENCY PREPAREDNESS How Clean Energy Can ...

    images.huffingtonpost.com/2012-11-08-CEGClean...

    stations, hospitals, control centers, traffic sig-nals, public transportation, as well as vital infrastructure like water pumping and filtration systems. The effectiveness of critical facilities and their ability to carry out their mission during an emergency is dependent on the reliability of their secondary or backup power systems.

  8. Return loss - Wikipedia

    en.wikipedia.org/wiki/Return_loss

    Return loss is a measure of how well devices or lines are matched. A match is good if the return loss is high. A high return loss is desirable and results in a lower insertion loss. From a certain perspective 'Return Loss' is a misnomer. The usual function of a transmission line is to convey power from a source to a load with minimal loss.

  9. Kyle Connor's first-period hat trick lifts Jets over Canucks 6-1

    www.aol.com/kyle-connors-first-period-hat...

    Kyle Connor scored a natural hat trick in the first period to spark the Winnipeg Jets to a 6-1 victory over the Vancouver Canucks on Tuesday night. The left-winger’s sixth career hat trick came ...