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clanon
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GND would have continuity to any of those IC EMI SHIELDS (aluminum tin covering circuits) that's COAXIAL SHIELD (MESH) GND...just to be sure...
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Yellow ring is SHIELD (GND) (careful with those hairs, make a ring with solder) RED line is inner WIRE...50ohms feed point https://www.wifi-antennas.com/uploads/monthly_2020_09/5f714c7f94137_frontdesoldered.jpg.c2757e4d0fc1d166241bf1cbe9d605d3.jpg.7e186604399d80e2a8f10e2d24415cec.jpg
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Electromagnetic Fields at HIGH Frecuencies...behave like witchcraft ...(before simulations was hard to figure it out...and still is)
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It's a PIFA antenna (low gain)...Check continuity ...but i think cable (50ohms shorter you can) goes like this Try with a DIPOLE
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DISTANCE and AREA/SHAPE (curved angled) is IMPORTANT ...fiddle with it use a fast and sensible indicator of level quality
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I start up with PEC and NO loss materials...then ...when you get close to your goal , you could switch'em to REAL WORLD materials... PS: The ENCLOSURE has a MAIN ROLE in FR , and losses...imho
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if you don't get closser to -60dbm or even under -60... AND link QUALITY (PACKETS) OVER or CLOSE to 70% you won't have SPEED or stability If you can , try a reflector (ANY METAL) behind your antenna and the signal direction...
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Port 2 is not getting to 20...i'm working on it...TOO MANY stubs and LONG feed lines... Is the one on the left
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What ya think...? JOMY Port 1 (middle port)
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LOTS of STRIPLINE HAIRPIN FILTERS...
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this is similar Polyurethane with aluminum film... https://youtu.be/9nA0PBCHiOg?t=245 https://www.youtube.com/watch?v=yv1pV2r-HPs