RF Q&A

 Q1. "Filter in front of LNA" vs "LNA in front of filter"

A1. "LNA in front of filter" (w/ proper frequency response) provides better RF performance.

Q2. PA linearity index?

Q3. Spectrum Analyzer : Resolution BW vs Video BW

A3. Resolution BW : frequency axis grid

    Video BW : displayed spectrum is low-pass filtered.

Q4. Btwn TDD and FDD, which requires higher quality power supply? why?

    (same Fc, BW, 64QAM and peak power)

A4. FDD. Higher power supply helps inter band seperation.