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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. Mismatch loss - Wikipedia

    en.wikipedia.org/wiki/Mismatch_loss

    Any component of the transmission line that has an input and output will contribute to the overall mismatch loss of the system. For example, in mixers mismatch loss occurs when there is an impedance mismatch between the RF port and IF port of the mixer [dubious – discuss]. [4]

  4. SWR meter - Wikipedia

    en.wikipedia.org/wiki/SWR_meter

    A standing wave ratio meter, SWR meter, ISWR meter (current "I" SWR), or VSWR meter (voltage SWR) measures the standing wave ratio (SWR) in a transmission line. [ a ] The meter indirectly measures the degree of mismatch between a transmission line and its load (usually an antenna ).

  5. 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.

  6. 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

  7. Venezuelan planes sent to US for deportation flights return ...

    www.aol.com/news/venezuelan-planes-sent-us...

    Two planes sent by Venezuela returned to the country from El Paso, Texas, on Monday with nearly 200 Venezuelans who were in the U.S. illegally.

  8. Antenna feed - Wikipedia

    en.wikipedia.org/wiki/Antenna_feed

    In a radio antenna, the feed line (feedline), or feeder, is the cable or other transmission line that connects the antenna with the radio transmitter or receiver.In a transmitting antenna, it feeds the radio frequency (RF) current from the transmitter to the antenna, where the energy in the current is radiated as radio waves.

  9. The USPS, UPS SurePost delivery contract is over. Will this ...

    www.aol.com/usps-ups-surepost-delivery-contract...

    U.S. Postal Service (USPS) workers will no longer deliver UPS SurePost packages after the government agency's contract with the parcel service expired this year.