H145 Magnetic SMA-J, 408MHz 433MHz LoRa Antenna, AH1G.406

Further reading

• Antenna Gain Explained: dBi vs dBd, and Why Higher Is Not Always Better — Antenna gain is directionality, not amplification. dBi = dBd + 2.15, and every 3 dB of extra gain halves the coverage angle — which is why a 3 dBi omni usually beats a 9 dBi omni on a device whose orientation you cannot
• Sub-GHz ISM and SRD Frequency Bands by Region: 433 / 868 / 915 / 470 MHz — A region-by-region table of the license-free sub-GHz bands used by LoRa, ISM and SRD devices: 433 MHz (ITU Region 1 only), 868 MHz (Europe), 902-928 MHz (US), 470-510 MHz (China), 920 MHz (Japan), plus the LoRaWAN regional channel
• LoRa Antenna Frequency: 433 MHz vs 868 MHz vs 915 MHz vs 470 MHz — The choice is regulatory first and technical second: 868 MHz for Europe, 915 MHz for North America and Australia, 470 MHz for China, 433 MHz where ITU Region 1 permits it. Propagation differences inside 433-928 MHz are small compared with duty cycle and EIRP
• IoT Connectivity in 2026: What the LPWAN Mix Means for Antenna Buyers — Roughly 21 billion IoT connections are in service, with NB-IoT and LTE Cat-1 bis leading module shipments and LoRaWAN at 125 million devices outside China. The practical consequence for antenna sourcing: multi-mode, multi-region products, not single-band