# MIoTy Sigfox was the old standard 69hW https://www.sparkfun.com/rfm69hcw-wireless-transceiver-915mhz.html RFM69HCW Wireless Transceiver - 915MHz Telegram Splitting Ultra Narrow Band or TSUNB 868 MHz carrier, two channels of 100kHz MQTT and Mosquito 2300kBit/s kbps TX Chip Hope RF - hope rf hm-trp-915 rf module Design Note (DN) from ti on Antennas Vector network analyzer; Smith diagram to plot complex impedances; or smith chart https://gitlab.tu-ilmenau.de/tihe4927/pico-demo-tsunb VNA = Vector Network Analyzer Misst die S-Parameter durch S11 = wiviel reflektiert die Antenna MIoTy <--> mqtt ![IMG_20250410_100515.jpg](https://unikat-ilmenau.de/wiki/attachments/29) ![IMG_20250410_100539.jpg](https://unikat-ilmenau.de/wiki/attachments/30) ![IMG_20250410_100810.jpg](https://unikat-ilmenau.de/wiki/attachments/31) [![](https://unikat-ilmenau.de/wiki/uploads/images/gallery/2025-04/scaled-1680-/image-1744273824808.png)](https://unikat-ilmenau.de/wiki/uploads/images/gallery/2025-04/image-1744273824808.png)[![](https://unikat-ilmenau.de/wiki/uploads/images/gallery/2025-04/scaled-1680-/image-1744273824777.png)](https://unikat-ilmenau.de/wiki/uploads/images/gallery/2025-04/image-1744273824777.png)