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Help me with a RF FrontEnd design

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timbolev

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RF Front End

This is what i need to build. Help? i and q are between 32kHz and 640kHz
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melc

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Re: RF Front End

IQ are quite low. Which is the frequency range on the antennas ?
Why is required a HPF after the mixers, followed by an amplifier and a BPF ?
 

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