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On the top layer of the PCB, the Ground should not connect to the shield
directly,and it looks like a island. Did someone do it like this?and why?
for pcb design ,I don't think so.no difference for two ways
We see bits before GMSK modulation for baseband signal,then we get symbals for RF.but there are 148 bits in useful part of burst ,not 148 symbals?so what kind of signal we get from antenna in time domain?
one more question, any one can give me an overview of communication steps after powering...
Most mobile products are designed with Class C power amplifiers, which offer the highest power efficincey. However, because they are nonlinear, requires the amplified signal to have a constant envelope.
why nonlinear PA amplifier a constant envelope?
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