Which component design will be the most challenging in sub-6 GHz 5G handsets?

Filters and multiplexers [1 votes] (9%)
 
PA bandwidth and efficiency [5 votes] (45%)
 
Switch linearity [0 votes] (0%)
 
Antenna tuning [2 votes] (18%)
 
Front-end module integration [3 votes] (27%)
 
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