Circulators are pretty pricy. You will need at least one to keep the
high power energy from each magnetron from getting back into the
injection source. I read somewhere that about 2% of the magnetron power
is required to injection lock. As far as phase, you will need a
mechanical or electrical means to adjust the phase of the legs of the
injection signals as well as a means to adjust the phase of the
magnetrons when combining them. Typically a peice of coax or waveguide
of some fraction of a wavelength as require IE; 1/4 wave = 90 degrees.
Coax has a velocity factor which makes it behave electrically longer
than it is physically.

I am guessing, but perhaps with proper coupling technique, you might get
the magnetrons to lock to each other coherently.

Bert wrote:

Show how much are circulators?. For the phase can I add an adjustable
delay?

Again Thanks,
Bert


On Jan 15, 11:07 pm, Erich wrote:


One microwave oven magnetron will get you pretty close to the legal
limit. They can be injection locked together, but that usually requires
a circulator that can handle the necessary power (big $). You also need
some way of adjusting the phase between the magnetrons so that the power
will add. The adjustment can be tricky as they will tend to interact
even with the circulators.

73, Erich N6FD



Bert wrote:


Does anyone in the group know anything about magnetrons? I planning to
do some experiments in transmitting microwaves.


I would like to use standard magnetrons from a microwave oven and
believe I can beam further if operated at the same frequency and
with the outputs in phase. I have no idea on how to do this. Please
advise


Cheers,
Bert- Hide quoted text -


- Show quoted text -






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