What cable specifications do I need for RFID reader-to-antenna runs longer than 30 meters?
Use low-loss LMR-400 or equivalent coaxial cable with quality N-type or SMA connectors rated to -20dB/100ft loss at your operating frequency (UHF ~900 MHz). Longer runs lose 1–2 dB per 30 meters, directly reducing read range. Measure and test cable assemblies before installation; poor connections account for 40% of dock read failures.
Can I mix UHF and HF readers on the same network segment?
Yes, readers can share ethernet and PoE on a managed switch, but they operate independently over the air. Avoid placing UHF and HF antennas within 1 meter of each other to prevent crosstalk. Use separate subnets or reader groups in your WMS middleware for clean singulation and tag handoff between frequency bands.
How do I choose between passive and active RFID tags for pallet tracking?
Passive UHF tags cost $0.08–$0.12, require 4–6m read range, and work for 7–10 years; best for high-volume, short-cycle warehouse moves. Active tags cost $8–$15, guarantee 15–30m range and 3–5 year battery life, suit slow-moving asset tracking and outdoor yards. Calculate cost-per-read-event: passive wins at >200 scans/tag lifetime.
What mounting hardware do I need for a permanent dock-door RFID installation?
Use stainless-steel antenna mounts (IP65 rated), fiberglass or PVC conduit for cable runs, and weatherproof reader enclosures with internal cooling fans for outdoor bays. Budget for industrial M12 connectors and cable ties rated for UV and temperature cycling (-20°C to +60°C). Annual vibration checks on dock-frame mounts prevent antenna slip and read drift.
How much spare antenna and connector inventory should I maintain?
Keep 2–3 spare antenna assemblies (fully assembled and tested) and 10–15 N-type/SMA connectors plus 5 feet of bulk cable per reader in your spares bin. Replace connectors every 18–24 months in high-vibration dock areas. Antenna life varies; mechanical damage from handling exceeds electronic failures, so budget for replacement rather than repair.
Can RFID readers work reliably near metal racking and conveyors?
Metal surfaces reflect RF energy, creating dead zones and multipath fading. Position antennas 0.5–1m away from racking, angle toward read zone rather than parallel, and use circular polarization to mitigate bounce. Test read performance in your exact racking layout before full rollout; multipath loss can cut effective range by 50–70% if not managed.
