For a device that can transmit as well as receive, consider HackRF: https://github.com/mossmann/hackrf/wiki https://github.com/mossmann/hackrf/wiki It's been

For a device that can transmit as well as receive, consider HackRF: https://github.com/mossmann/hackrf/wiki https://github.com/mossmann/hackrf/wiki It's been out for a while. The newer option is LimeSDR, which just shipped: https://www.crowdsupply.com/lime-micro/limesdr https://www.crowdsupply.com/lime-micro/limesdr (Note that you need to comply with all local laws regarding transmitting).