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Decibel
By
Doug
A unit used to express the ratio between two values, including antenna gain, cable losses and reader power output. The formula for decibel is: dB=10 log (P1/P2). In layman’s terms, dB represents the difference in the intensity of an emitted signal or power where 0 dB is the reference, 3 dB is twice the intensity of 0 dB, 10 dB is 10 times the intensity, and 20 dB is 100 times the intensity and so on. (See also dBi, dBm and dBw.)...
A unit used to express the ratio between two values, including antenna gain, cable losses and reader power output. The formula for decibel is: dB=10 log (P1/P2). In layman’s terms, dB represents the difference in the intensity of an emitted signal or power where 0 dB is the reference, 3 dB is twice the intensity of 0 dB, 10 dB is 10 times the intensity, and 20 dB is 100 times the intensity and so on. (See also dBi, dBm and dBw.)
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