Antenna Circuit Design For VoCore Part 1

I am a newbie on antenna, after study a lot from internet, get some knowledge about it.

PCB board is 1mm, composed by 9 layers:

1. Top Solder Mask      ==> 0.5mil
2. Top Copper           ==> 1.35mil(1oz)
3. PP 7628              ==> 7mil 
4. Inner Copper         ==> 1.35mil
5. Main                 ==> 20mil 
6. Inner Copper         ==> 1.35mil
7. PP 7628              ==> 7mil
8. Bottom Copper        ==> 1.35mil
9. Bottom Solder Mask   ==> 0.5mil

Total: about 40mil

PP7628 DK=4.2~4.7(4.7,<1GHz), use 4.3 for 2.4GHz. width=13mil,  Z=49~50ohm,  ceramics antenna Z=50ohm, perfect matched. So after this calculation, I changed board height from 0.8mm to 1mm and use line width 13mil for antenna.

5 thoughts on “Antenna Circuit Design For VoCore Part 1

  1. Is the thickness of the board effect impedance as well? Don’t get me wrong, I am no expert either but I though it is the line width and space between line effect Z.

    1. Ye, Z depends on distance of inner layer(GND) and top layer, line width, dielectric constant(this depends on signal frequency somehow). I am not very clear how to calculate it exactly but the software said so. :)

  2. When the new design is ready for sale? I am very interesting for your board.

    1. Thank you for your attention :) New version is v0.5, it will publish in middle of May. The board of old test version are all sold out.

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