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Old March 8th 08, 02:23 AM posted to rec.radio.amateur.antenna
[email protected] nm5k@wt.net is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 757
Default Antenna physical size

On Mar 7, 7:29 pm, Art Unwin wrote:

When he brought the question of Q into the picture he made the
statement that small antennas
are usually of a low impedance which is correct empirically with
respect to existing designs but it is not exclusive
when dealing with all radiators that can be made that comply with
Maxwells laws.


I take it your version is gifted and suffers not from a low Q... :/

As I have said before it is implicite in Maxwells laws
that a efficient radiator can be any size shape or configuration as
long as it complies with Maxwells law.


Sure it can. Common knowledge. It's also common knowledge
that the trick with building a small efficient antenna is not really
the size of the radiator itself, it's actually getting power to that
small radiator.


In my case my small antenna can have any impedance value for
equilibrium and it is quite easy to have a resistive impedance in the
hundreds of ohms as well as minuit impedances. I conform to 50 ohms
purely because of component availability. As another aside my small
antennas
have a much wider bandwidth than any other available!


As previously noted, you have reinvented the air cooled dummy
load. Your performance specs sure seem to mimic one anyway.. :/

As far as gain
or energy transmitted that all depends on what frequencies get thru
the bandpass filter and in no way directs out of pass energy to be be
redirected to band pass status and augment energy transmitted. Stored
energy has no relationship to Q in my mind since it goes around or
circulates as with a tank circuit energy that lies within the pass
bandof the tank circuit filter.
To summate, my antenna design is considered small yet complies with
Maxwells laws and yet does not have a narrow bandwidth or low
impedance thus Chu's comments cannot be inclusive of all radiators.
Best regards
Art


As far as the rest, my cat has mittens.. :/
BTW, you need to define "equilibrium".
After several months you still are lagging at this task.
MK