What is the recomended thickness of the FR4?
Also is there any thickness reccomendation for the groundplane?
best regards Johan
There is no recommended FR4 nor copper thickness, those do not impact the antenna performance.
Good points raised here, and I have some ideas to share:
- Wouldn't better to test the battery with leads.. with at least 1mm spacing from the carrrier FR4 PCB?
- As in that case of battery proximity, we need to compensate for several per-cent of loop length, placing the unplated holeson the inside of loop, and tuning with wider drill/mill bit should bring us to desired lower frequency whilst tuning the samples. It would require changing just hole diameter in final product design for manufacturing.