How substrate thickness affect the antenna performance?

[mahmoud.tolba]

Hi Nordic Community and Developers,

I'm designing a small Bluetooth module using nRF51822 to use it in my next projects and I need to use thinner substrate material (~0.65mm).

Now I need to know how it will affect the antenna performance and the reference design layout.

Any useful links?

Waiting to hear from you :)

[bjorn-spockeli]

Yes, the substrate thickness will affect impedance of the transmission lines on your board. I recommed using AppCad to calculate the transmission line parameters in order to achieve an impedance of 50 Ohm

Below is a screenshot from AppCad showing the parameters for a FR-4 board.

-Bjørn

[mahmoud.tolba]

Thanks Bjørn for your answer