How Can We Avoid Signal Loss?

By RFID Journal

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Ask The ExpertsHow Can We Avoid Signal Loss?
RFID Journal Staff asked 8 months 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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