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External GPS on Thingy91 v1.4

Hello, 

I noticed that you improved the hardware design in version 1.4. 
Is it still neccessary to use a bias tee for an external GPS? 
https://devzone.nordicsemi.com/f/nordic-q-a/52992/thingy91-gps-antenna-recommendation
Or can I just connect a active gps antenna to the thingy91?

If I buy a passive gps antenna do I need anything else ? 

Thanks for your help

Omarama

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