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There are many rules of thumb,
Essentially, First, you have to make a proper plan about the priority of signal
routing.Second, proper planning of placement. Third, Inspect important aspect
of Isolation ( loop filters, TX/RX high energy signal trace..), grounding(PA for thermal, SAW for ground return current which affect out-band isolation much), filter component placement relative to IC pins( capacitor close to V control input of VCO, bypass capacitor near IC pin to avoid long cuurent loop accross layers).
Really sorry for no document, those comments I presented are experienced stuff, which may be one way you can reference, and believed to have some room to be improved and complemented. So, Thanks great for footprint !
Pls feel free to email(just for quick answer as I can) or post any thing you want to
have discussion with me.