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V.S.W.R < 2.50

The V.S.W.R. parameter, which is an abbreviation of the English term "Voltage Standing Wave Ratio" and is referred to in English as "Standing Wave Ratio" (PSV), is a technical figure that describes how well the antenna is adapted to the signal source, for example, to the LTE modem to which it is connected by cable. This parameter expresses the rate at which the signal is reflected back from the antenna into the cable instead of being radiated into the surroundings. The ideal value is 1, which would mean that all the energy from the device is fully used and radiated by the antenna. Therefore, a V.S.W.R. value < 2.50 means that the manufacturer guarantees that the ratio will not exceed 2.50. At this value, approximately 18% of the signal power is reflected and lost from the antenna. For the user, this means that the vast majority of the signal is effectively transmitted, but a small amount of power is lost due to imperfect matching. A lower V.S.W.R. value is generally better as it indicates less loss and more efficient operation of the whole system. A value below 2.50 is considered acceptable for LTE antennas to provide a functional link.

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