Topic
Wireless
WiFi, channels, airtime, radio links and antennas.
Learn first
WiFi That Performs: Channels, Rates & Airtime Why your WiFi crawls even with “full bars”: overlapping channels, PHY rates that lie, and airtime shared like a karaoke mic. ≈ 13 min read → Radio Links & Antennas: The Link Budget How to size a point-to-point link that survives winter: free-space loss, antenna gain, Fresnel zone and fade margin. ≈ 12 min read →
6 tools
WiFi Channel Planner
Detect overlap and co-channel interference on 2.4 / 5 / 6 GHz.
Wireless Link
Point-to-point link budget: FSPL, EIRP, Fresnel zone, RSSI and fade margin.
Coaxial Cable Loss
Calculate the attenuation of a coax run (RG-58/213, LMR-400/600…) by type, frequency and length.
WiFi PHY Rates (MCS)
802.11n/ac/ax/be (HT/VHT/HE/EHT) physical-layer rate table by MCS, channel width, guard interval and spatial streams.
WiFi Airtime & Capacity
Estimate the airtime each WiFi client consumes and whether the cell saturates, showing the slow-client effect on throughput.
Antenna & RF
Convert gain dBi↔dBd, power W↔dBm↔dBW, VSWR↔return loss↔reflection coefficient, and compute EIRP and beamwidth.