RFID Journal Staff asked 4 years ago For a portal antenna, with 30 feet of cable between a reader and a far tower, how much dB loss should we offset for? I have heard it's 2 dB for 30 to 45 feet.
—John
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John,
The answer would depend on the type of cable you are using. For passive UHF RFID readers, it's best to utilize LMR cables, which are high-performance coaxial communications cables that have different amounts of insulation to limit signal loss. For more than 30 feet, an LMR-195 cable would lose 3.3 dB, but an LMR-600, which has more insulation, would lose just 0.8 dB.
I hope to see you at RFID Journal LIVE! 2020 in April.
—Mark Roberti, Founder and Editor, RFID Journal
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