convert dbi to db
Hi yuyu,
Thanks for giving me the solution.
Again, I have some doubt.
As you told me about the friis transmission equation, I don't understand the difference between Pr,Pt and Gr,Gt.
According to my situation in testing the 1.45GHz(centre frequency) patch antenna, I am using the sweep oscillator as transmitter by keying -10dBm at power level icon and using signal generator as receiver and I'm getting about -60dBm.
Question 1:
Normally to find the gain, do we use the formulae below:
Gain=10 log (Pout/Pin)
Since I'm looking for dBi in the gain, which gain equation should use? The formulae that u gave me or use the formulae above.
According to practical value above which are -10dBm and -60dBm, how should I find the gain in dBi?
Question 2:
Using the friis equation, where do I need to apply -10dBm and -60dBm. Is that Gr, Pr, Pt or ...? I'm confused.
Please reply me. I really need your help. Urgent!Urgent!Urgent!
Waiting for your reply.
Thank you.
Regards,
Saran.
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