Well, the standing wave is the result of 2 moving waves (forward and reflected, see gif in AG his post #133 above).
I should have tailored the Grenade coil so that both the LC resonance frequency and that standing wave frequency are the same, but i fail to conclusively test that.
Itsu
Yes, I know that, and standard antenna theory. If you are injecting only one frequency then the standing wave will be the same frequency but with the delay, use a cross needle SWR meter and connect the meters to two channels to your oscilloscope. I must admit I have not looked at all this thread but I assume the idea is to coincide the peaks of the forward and reflected wave peaks to double the energy and extract it. The problem I see is if the directions are opposite the positives and negatives will cancel out, where is the gain if they are both sine waves! If they are half waves then there is a possibility, but there should be a frequency and so phase difference between the two even if it is a few 10s or 100s of Hz of a second or third harmonic of the first harmonic. EG. First harmonic 1000Hz 1000Hz Second harmonic 2000Hz 0Hz 1000Hz Third harmonic 3000Hz First harmonic 1000Hz 1100Hz Second harmonic 2000 + 100 = 2100Hz 100Hz 1200Hz Third harmonic 3000 + 300 = 3300Hz Both the above are repeating cycles, but only the second set will be able to have a possible gain, that within the 100Hz. If you want to remove the post, it is ok with me, that is if you don't think it has any reference to the replications in this thread. Regards Mike
---------------------------
"All truth passes through three stages. First, it is ridiculed, second it is violently opposed, and third, it is accepted as self-evident." Arthur Schopenhauer, Philosopher, 1788-1860
As a general rule, the most successful person in life is the person that has the best information.
|