To:Jamesanton,
I really did like you said,it seems that if I set the "Subatrate Layers" like this "FreeSpace+FR4+FreeSpace_Bottom,and "Layout layers"like this"FreeSpace+STRIP cond+FR4+STRIP solder_mask".The final result is good,which means the S11 can be less then -9.6dB in the BW(3dB),but the gain of the antenna is -40dBi which certainly is not so ideal,is there any way to anvance the gain?
To:Volker
It really make difference when top and bottom metal layers are mapped in my stackup,what I mean is that if I set the "Subatrate Layers" like this "FreeSpace+FR4+FreeSpace_Bottom,and "Layout layers"like this"FreeSpace+STRIP cond+FR4+STRIP cond2".then the result is so bad,S11 only to be -0.2dB in the BW(3dB) of the antenna.
Is there any problem of the setting?
Thank you for all your help!
and:
Welcome you to Hangzhou in China,It is a really beautiful city with famous west lake in it,I can be your loyal tourist guide!
Best regards!
myvioletchen