Part Number: CC2652PSIP
i have inverted f antenna on pcb , with launchpad ble i can achieve like 7 rssi when it's close to mobile phone , on my custom board it's was like 22 rssi , long range also has issue, i just want to know how to resolve this issue in hardware level.tested with smart rf studio has rougly max 10 rssi difference between launcpad and custom board. zigbee protocol and ble protocol example are giving big difference like 15.
additional info
4 layer fr4 pcb
in between sip and antenna it has 15pf capacitor in series.
