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Hi K.
I have fixed my problem
the gnd is an osc gnd of mcu,the mcu doesn't work in worse RF Environment, I find when rf Interference on,the wave of osc is very poor even no osc wave , i modify the gnd,then it is fixed,so i want to find why and do not make the same mistake. Minimum opening...
thanks for your reply
this is a RI problem ,the gnd is poor trully,we have fix it by modify gnd
but my boss ask me to find the theroy back why it is sensitive to a Interphone which work at 430MHZ
Re: Help me 2 design a wireless transmitter and receiver cir
If you are skilled in RF,you can make a circuit Oscillator which work at 315MHZ with SAW.the receiver can use many kinds of ic,ATA5724 for example
personal suggestion, for reference only.
I had a simulation on a ground impedance analysis of pcb,
the impedance is big at 558mhz, the electric size is smaller then 558Mhz.
I'm a newer in RF,anyone can tell me what reason can cause this and which theroy can explain it.
thanks a lot
Re: add watch in CST
which studio do you use,if mws,please note plot tool
Added after 4 minutes:
do you mean how to look smith chart when you sweep a param in a simulation task,maybe vba is a method
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