I am having a hard time understanding a few things in a datasheet (1206 bluetooth chip antenna).
Page 4 in the datasheet says terminal 2 is NC (just for mounting I guess).
But on "evaluation board and matching circuits" (page 5), it seems this NC terminal is actually connected to ground?
What's more confusing is that INPUT has half of the terminal area also connected to ground.
When making a footprint/land pattern for this part, should I make a replica of the 5x6mm shown in the attached picture (with ground on the 2.25x0.74mm top left "leg" and all of the right 1.8x1.25mm area) and RF feed line, just the 0.62x0.74mm lower left?
And the top image says PI-matching on the feed line, but the image below shows an L-network.
All this is very confusing to me, so any help would be appreciated.