Tuning U.FL / Antenna Cable Assemblies
fff created the topic: Tuning U.FL / Antenna Cable Assemblies
Cellular, Wi-Fi, GNSS and Bluetooth radios are available as FCC-certified modules with a U.FL connector that connect to an external antenna through a cable assembly. Why do you never see an antenna matching network in finished products that use this approach?
N10sive replied to the topic: Tuning U.FL / Antenna Cable Assemblies
If you are talking about a module, it is most likely the supplier assumes a 50Ohm line and that the U.Fl SMT connector is 50Ohms.
In a finished product with an antenna, the manufacturer has most likely "tuned" the antenna to the desired frequency without using a matching network.
In the case of cellular, it is also difficult to have a desired matching network, for a multi-band antenna etc. There are also less stringent parameters specifications for VSWR in cellular, at least in the lower bands.
This is also due to cost, efficiency, space-constraints, etc.
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