T
thejim
- Jan 1, 1970
- 0
What do we mean by saying that a dipole antenna is electrically short?
thejim said:What do we mean by saying that a dipole antenna is electrically short?
"thejim"
What do we mean by saying that a dipole antenna is electrically short?
It means that the antenna is exhibiting capacitive reactance to the
signal being applied.
Adding inductance can cancel that out.
Phil Allison said:"Anthony Fremont"
= a congenital autistic cretin
** Idiot.
It means the dipole antenna's width is less than a half wavelength of the
frequency.
** Has no impact on the fact it is "electrically short" and hence an
inefficient radiator.
You fucking brainless Texas Twat.
Electrically that is, not necessarily physically.
You do know about velocity factor, right phil?
Radiation efficiency has very little to do with any of this.
Phil Allison said:"Anthony Fremont"
= a congenital autistic cretin
** FUCKING Idiot.
** WRONG - FUCKHEAD.
** IRRELEVANT to the antenna - FUCKHEAD !!
** WRONG - FUCKHEAD !!!
Fremont is a PIG IGNORANT ASSHOLE.
A vile, anencephalic, autistic Texas Twat.
Millions of these evil PUKEs down there.
thejim said:What do we mean by saying that a dipole antenna is electrically short?
John Popelish said:short?
It means that it has a resonant frequency a little higher than what is
being applied to it.
It's still true phil,
That's precisely how it works.
Really now phil, you know even less than I suspected. Velocity factor
applies to all of it, especially the antenna itself.
Where is your disputing evidence phil?
Why don't you try providing some facts phil?
Instead of name calling,
why don't you show us all some evidence to back up your libelous claims?
I guess that was it. Typical spastic fit when you don't have an answer,
It means that it has a resonant frequency a little higher than what is
being applied to it.
Phil Allison said:"John Popelish"
** The OP is more likely considering the term in relation to a dipole that
is undersized by a fairly large degree.
http://www.hard-core-dx.com/nordicdx/antenna/wire/shortdipole.html
Leave it to you to find the obscure,
In this particular case you are right, efficiency is extremely
hampered by the incredible shortness of the antenna and inductance will
not make the antenna work any better, it would make a transmitter very
happy though. Why you immediately assume the OP is referring to MF
antennas is beyond me.
Phil Allison said:.... nothing of significance
FYI, I own a few well worn ARRL Handbooks (including my first one from
1974), the Antenna Compendium and many other radio THEORY books
including a Sam's Radio Handbook.
http://www.ee.surrey.ac.uk/Personal/D.Jefferies/antennexarticles/radimp.htmThe exact same concepts apply to "electrically short" VHF and UHF antennas.
** So you are fuckwit radio ham ??
Explains it all really.
"Phil Allison" scrawled
You didn't answer my question.
Phil Allison said:"Anthony Fremont"
** So you are know nothing, fuckwit radio ham ??
Explains it all really.