I am using a standard RF module (i.e., Bluetooth-module-on-PCB), which has a PCB-trace-type anntena. It is in turn to be soldered onto my main PCB. The whole thing will be powered by a standard Li-ion battery.
Which of the following two placements of the RF module would perform better, in terms of offering optimal transmission/reception?
(I prefer Placement B for logistical reasons but I am unsure about the effect of the RF module antenna's proximity to the battery, which I'm guessing will act as a huge ground plane.)
RF module placed on top of my main PCB (which I'll make sure to keep out the copper pour/traces, etc. in the area directly under the RF module's antenna)
RF module turned upside down and placed between PCB and battery.