Re: out of "Presentation on the NanoVNA for the raileigh Radio Society", Now: "False Return Loss Calculations"
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Does all of this mean that the RL on the NanoVNA and VNA Saver are wrong and should be positive??Deon
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-------- Original message --------From: DJ7BA <dj7ba@...> Date: 2020/06/02 19:19 (GMT+02:00) To: [email protected] Subject: Re: [nanovna-users] out of "Presentation on the NanoVNA for the raileigh Radio Society", Now: "False Return Loss Calculations" Thanks, Alan - wonderful source !? I love it. You made my day!Congrats for having shown this. I can only agree.From it's second very basic formula, (when leaving alone the '(db)',)it is possible to derive the correct |Gamma| formula, as is used in the first one.Resulting is:with L for Load and S for Source, the asterisk meaning conjugate complex.Just one little remark - knowing we cannot easily change words everybody uses:The "incident" and "reflected" power is found on a transmission line.At a complex impedance termination of a complex impedance source,there is nothing reflected, however.The power difference, instead, is that between "available" (but not always fully used)real power and the real power actually delivered to and dissipated in the load¡¯s real part.???? In which exact IEEE document did you find it????? When was that published? Where and how can I get a copy?Why does the probably best Smith diagram program available today,(that I do not want to name in this context,) when using a complex source,ignore the IEEE quote and rather stick to that false ATIS like formula?Why does ATIS not change the false one? I think, time has come to do so.Thanks again Alan - for this, it's the best source I ever was shown so far !73, HansDJ7BA-----Urspr¨¹ngliche Nachricht-----Von: [email protected] <[email protected]> Im Auftrag von alan victorGesendet: Dienstag, 2. Juni 2020 18:31An: nanovna-users@...: Re: [nanovna-users] out of "Presentation on the NanoVNA for the raileigh Radio Society", Now: "False Return Loss Calculations"On this return loss discussion... sorry can't help myself...See the attached. Hope that clarifies... again.Alan--Diese E-Mail wurde von Avast Antivirus-Software auf Viren gepr¨¹ft.
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RandMental