Hello,
Always in a very compact design, I use a multilayer ceramic chip antenna 2.4GHz (see technical specification attached) but I have not enough pcb surface between RFIOp and ceramic antenna to place pi network for antenna matching and 3.3nH inductor for WLCSP package 50 ohms matching. Does the 3.3nH inductor is enough or not ? Is it possible to mix 3.3nH inductor with pi network to have 3 components instead of 4 ?
Thank you.
Regards,
Michel
Attachment:
Device:
HI Michel,
Can you please follow the posts below perhaps will give you an insght:
http://support.dialog-semiconductor.com/using-0402-inductor
http://support.dialog-semiconductor.com/minimal-design-no-inductor
Thanks MT_dialog
Hi,
My problem is not for buck/boost converter inductor but for antenna matching circuit componants. The ceramic antenna is very close to the RFIOp output of DA14580 WLCSP34.
Regards,
Michel
Hi Michel,
I presume you are using the WLCSP type of the 580.
Its RFIO impedance is 25 - J25.
Adding the 3.3nH will give you 50 Ohm +/- a few J.
当有一个50欧姆antenn跟踪和假设a impedance is a neat 50 Ohm as well, the 3.3nH should be enough.
In case the antenna is not 50 Ohm, you'll need the antenna matching filter.
Yes, you can add the 3.3nH as part of the matching network if the 1st matching part is a shunt inductor.
Success.
Best regards, BB_Dialog