we use 2 PCBs: one developed for the power distribution and collecting telemetry data as position and temperaure, and the other one to complete the TDOA goal.
as you can understand from the explanation, we need high level components and materials including PCBs. we therefore decided to rely on JLCPCB. the work done to produce our cards was fast and of a formidable quality. from the moment we sent the GERBER files the PCBs arrived at their destination (Italy) in less than 7 days using the DHLexpress service which proved to be very cheap compared to predictions from Italy itself. ordering and having your project evaluated is very simple and instant. besides, there is always an active chat where I never waited more than 3 minutes to get an exhaustive answer. the price for the production of the boards is very low despite the fact that the products are almost perfect for every application. By ing. electronic I can only recommend this company. the cards arrive packed and often vacuum-packed. From time to time JLCPCB will delight you with cute gadgets. I leave you the link, to go and visit it !! https://jlcpcb.com/RAT