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econotag antenna hack
Hacking an SMA connector onto an Econotag
Warning this can cause permanent damage to your econotag
This hack will be shown on a blank PCB as I'm going to remove the stock antenna completely.
Cut the antenna off right where the ground plane under the feed ends. You will lose access to the following pins: ADC0-1; VREF1,L,H; IO42, TXON, RXON, IO43.<
Add SMA connector
Add the SMA connector so that the center pin mates with the feed. Solder the center pin to the feed.
This one from Digikey should be fine: CONSMA002-ND
Solder the ground connection
Solder some ground pins on the SMA to the ground plane on the econotag. For the configuration shown, doing this on the back side is best.