Our latest RP2040 Board has an RFM69 or LoRa radio module on it, and to make it easy for folks to use external antennas for good range, we added a uFL connector (https://blog.adafruit.com/2021/11/30/the-great-search-ufl-connector-thegreatsearch-digikey-adafruit-rf-wifi-digikey-adafruit/). These common RF antenna connectors are good for up to 6GHz or so, and are nearly universal.

However, for larger antennas such as those for 433MHz or 900MHz signals, we may want to have a large stick antenna which is panel mounted. For those situations we'll want to connect a standard SMA-type antenna! SMA connectors can also be on a PCB but they're pretty big and are not SMT so it's common to use a uFL to SMA adapter cable. Where to get those? Why, Digi-Key, of course!

See the chosen part on Digi-Key at https://www.digikey.com/short/bb5bw8pw

Visit the Adafruit shop online - http://www.adafruit.com

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