H108 Rubber SMA-J ,5.8G antenna

Further reading

• Wi-Fi Channel and Frequency Table: 2.4 GHz, 5 GHz, 6 GHz and Wi-Fi 7 — Centre frequencies and rules for every band Wi-Fi uses: 2.4 GHz channels 1-13 (only 1/6/11 are non-overlapping at 20 MHz), 5 GHz U-NII sub-bands with DFS, 6 GHz (Wi-Fi 6E) at 5925-7125 MHz, and Wi-Fi 7's 320 MHz
• FPV Video Links in 2026: Frequency Rules by Country and Why Antennas Beat Power — The US allows about 1 W for certified spread-spectrum 5.8 GHz video while the EU and UK cap licence-exempt airborne video at 25 mW EIRP — a gap of roughly 16 dB. That is why European pilots get range from antenna quality and placement instead of transmit
• Impedance Matching and the Smith Chart: A Practical Guide for IoT Antenna Tuning — Matching moves the antenna's impedance to the 50 ohm centre of the Smith chart so power actually leaves the transmitter. In practice it is a loop: measure S11 with a VNA in the final enclosure, adjust the pi-network parts, re-measure — and expect the enclosure to be part of the
• VSWR, Return Loss and S11: What the Numbers Mean for an IoT Antenna — VSWR, return loss and S11 are three views of one defect — reflected power. VSWR 2.0 costs only 0.51 dB of mismatch loss, so the number that really matters is whether the antenna stays matched across the band in your enclosure, not whether it hits