chip antenna for nRF52832

[cgadgil]

I want to use the 2450AT42E010B chip antenna from Johanson Technology in my design. I selected this antenna specifically because i want to make a beacon using the nRF52832 of the same size as my coin cell. this antenna seems to specially designed for such PCB designs where the bottom side of the PCB under the antenna will have metal (coin cell in my case). however my issue is with the matching ckt for this antenna. I am not sure if the matching circuit shown in the nRF52832_PS_v1.4 reference design will still hold good for this type of antenna. 

Is there any reference design done at nordic where the antenna would have metal - coin cell or other under it? what would you advice in such cases? 

regards

chetana

[FormerMember]

The matching network in the reference layout is for matching the chip to 50 Ohm and damping some harmonics. In addition to that matching network, a matching network for the antenna is needed. We recommend using a pi-network. I would recommend you to read the tutorial "General PCB design guidelines for nRF52".