But where does that "lost power" go? :>) 73 Gary K4FMX _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lo
There will be the same degree of mismatch at the antenna that caused the reflection as there is at the transmitter. 73 Gary K4FMX _______________________________________________ See: http://www.mscom
Converted into hot air... where else could it *possibly* go? :-) -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek _______________________________________
Gary, An impedance mismatch is the same thing as a reflector. How do you think mirrors work? It's a matter of perspective. "Reality" of power flow is debatable. Let me describe it from my viewpoint a
end of a HF wireless signal transmitted with an antenna measured that has a 2:1 (impedance either high or low) SWR versus an antenna that has a measured SWR of 1:1.2 or so - given you are working wit
across the transmission line to current through the line. Every bridge we commonly use works that way. HF SWR bridges work as described above but on VHF directional couplers are used sensing direct
Well said, Martin. That is the beauty of transmission line theory. The time domain "reflection" model of what is going on is consistent with the steady state "circuit" model of what is going on. The
This brings up a haunting question that I have had for a long time.... Can an HF SWR/Power meter be used on 50Mhz accurately????? Just what is the difference between... say... the Mirage MP-1 HF mete
Too All the SWR Buffs ... Being extremely well versed in the mathematical physics of transmission lines, having spent years in measurement and lots of practical verification and now watching all the
This brings up a haunting question that I have had for a long time.... Can an HF SWR/Power meter be used on 50Mhz accurately????? Sometimes they can. Usually the accuracy is off a bit more. Just what
So could I ask the question again, as I am not sure I have gotten my answer yet. "What is the difference in perception at the receive end of a HF wireless signal transmitted with an antenna measured
Gene you must be a troll. :>) >:) As I first answered, no perceptible difference at the other end. All of the power will be radiated in either case except for a very small amount of feed line loss as
Return loss is a term for the ratio of reflected power to incident power (the reflected power is -26.4 dB less than the incident power). The actual through loss is hundredths of dB. _________________
But what happens to that 100W? It isn't dissipated at transmitter. Most of it is reflected back down the transmission line. And then 10% is reflected back. And so, back and forth it goes until all th