I have to put a GPS antenna on a PCB layout, but not sure how to calculate a matching network, and how to check that it will work correctly. I've chosen components with desired features (radiation diagram, amplification, and cost).
Actually, there are two or three networks, antenna - LNA - SAW - output.
But how do you choose the impedance matching components? For example antenna's and LNAs datasheets suggest different inductances. Do I have to put both inductances or choose one that fits?
SAW filter datasheet says that its input and output is 50 Ohm and nothing more. But here in this article Adding A GPS Chipset To Your Next Design Is Easy they use a capacitor after SAW.
This device in general is a small wearable GPS tracker - gsm+gps.
Is there some software for network calculation, or maybe some open-source ready schematics?