What makes a antenna so called " looks like a 1/4 wave again to the RF".

Where does it say a matching antenna must look like a 1/4 anyway.



"Add a coil to make up the missing
inductance and the antenna "looks" like a 1/4 wave again to the RF, not so,
the impedance is now very low at its feed point. Big mismatch (you forgot
the extra device now needed to match the antenna,usally a cap or coil on the
input side.so adding just a loading coil did not make it look like a
match.Notice I said a match . NOT a 1/4 wave. RF doesn't care what the
wavelength is. Where does it say a antenna must "look like a 1/4 anyway."
The same thing could be said about a base matched 5/8 wave antenna, it shows
a good match also and its is a long way from the 1/4 wave length. and is
never said it looks like a 1/4 to the RF.
Don't confuse a match to it looking like a 1/4.

There is many things that can be changed at the antenna mounting spot, 1/2
wave 5/8 wave

BuckEye,
But all antennas are 'matched', be they exactly a 1/4 wave
length long, or 75 feet long, or 1 inch long. I'm assuming
that you mean impedance matching, right? Impedance matching
has nothing to do with an antenna being resonant.
'Doc

What the hell do you think I am saying.
This all started when some dumass said a antenna was electrically 1/4 wave
long, not 1/4 wave antenna. You either have a 1/4 wave antenna or you
don't. If its shorter, then its not a 1/4 wave antenna. In most cases it
loaded, and no more electrically a 1/4 wave long antenna.
How hard is this to understand. I think this comes from some adds that's
states it a helical loaded
1/4 wave antenna that is only 56" long which is bull . Just like some other
adds that claim their antenna is a 5/8 antenna wound on a fiberglass rod
only 5' tall now go figure, I guess some also believe this .




"'Doc" wrote in message ...


BuckEye,
But all antennas are 'matched', be they exactly a 1/4 wave
length long, or 75 feet long, or 1 inch long. I'm assuming
that you mean impedance matching, right? Impedance matching
has nothing to do with an antenna being resonant.
'Doc

Hrm.. ever stop to think that maybe the wire helically wound around
the shaft might be 1/4 wave long? That would make it a 1/4 wave
helically loaded antenna. Just because the physical length of the
antenna is less than 1/4 wave at the desired frequency doesn't mean
the antenna isn't.

Don't believe me? Try looking up "folded dipole" on the 'net..

-SSB

BuckEye wrote:

What the hell do you think I am saying.
This all started when some dumass said a antenna was electrically 1/4 wave
long, not 1/4 wave antenna. You either have a 1/4 wave antenna or you
don't. If its shorter, then its not a 1/4 wave antenna. In most cases it
loaded, and no more electrically a 1/4 wave long antenna.
How hard is this to understand. I think this comes from some adds that's
states it a helical loaded
1/4 wave antenna that is only 56" long which is bull . Just like some other
adds that claim their antenna is a 5/8 antenna wound on a fiberglass rod
only 5' tall now go figure, I guess some also believe this .




"'Doc" wrote in message ...


BuckEye,
But all antennas are 'matched', be they exactly a 1/4 wave
length long, or 75 feet long, or 1 inch long. I'm assuming
that you mean impedance matching, right? Impedance matching
has nothing to do with an antenna being resonant.
'Doc

In rYlob.66399$Tr4.188400@attbi_s03, "BuckEye" wrote:

What the hell do you think I am saying.
This all started when some dumass said a antenna was electrically 1/4 wave
long, not 1/4 wave antenna. You either have a 1/4 wave antenna or you
don't. If its shorter, then its not a 1/4 wave antenna. In most cases it
loaded, and no more electrically a 1/4 wave long antenna.
How hard is this to understand. I think this comes from some adds that's
states it a helical loaded
1/4 wave antenna that is only 56" long which is bull . Just like some other
adds that claim their antenna is a 5/8 antenna wound on a fiberglass rod
only 5' tall now go figure, I guess some also believe this .

Gee, so you finally read a book and discovered that you were wrong. Fine. But
playing semantics in order to save face is a Twistedhedism.






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

BuckEye,
Hi. 'Dumass' here. Like it or not, antennas can and are
classified and/or described by their 'electrical' length.
Electrical length and physical length don't have to be the
same and seldom are when speaking about 'loaded' antennas.
When you find your self in a situation where everyone else
seems to be wrong, and only you are right, it sometimes helps
to stop and re-evaluate your position. Is it mandatory that
you think about antennas the same way I do? Nope, sure isn't,
but it does help if you at least understand 'where' the other
person is coming from, or talking about. It always helps to
view things from a different perspective. When you don't, the
loss is yours...
'Doc

On Fri, 31 Oct 2003 05:35:36 -0600, 'Doc wrote:



BuckEye,
Hi. 'Dumass' here. Like it or not, antennas can and are
classified and/or described by their 'electrical' length.
Electrical length and physical length don't have to be the
same and seldom are when speaking about 'loaded' antennas.
When you find your self in a situation where everyone else
seems to be wrong, and only you are right, it sometimes helps
to stop and re-evaluate your position. Is it mandatory that
you think about antennas the same way I do? Nope, sure isn't,
but it does help if you at least understand 'where' the other
person is coming from, or talking about. It always helps to
view things from a different perspective. When you don't, the
loss is yours...
'Doc

Doc;
I think he was calling me the dumbass, not you.
At first I just thought he didn't understand the theory that was being
posted here and wanted to learn. Hopefully he won't have the same
problems reading a book. Like you said his loss.

In , 'Doc wrote:

snip
When you find your self in a situation where everyone else
seems to be wrong, and only you are right, it sometimes helps
to stop and re-evaluate your position.

Wise words for anyone in a similar predicament, and especially for certain
paranoid individuals who incorrectly perceive the situation as some sort of
newsgroup conspiracy.






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Quoted:

When you find your self in a situation where everyone else seems to be
wrong, and only you are right, it sometimes helps to stop and re-evaluate
your position.

That's strange. Even Einstein found himself in that position.

In 7ZDob.73697$Tr4.195089@attbi_s03, "BuckEye" wrote:

Quoted:

When you find your self in a situation where everyone else seems to be
wrong, and only you are right, it sometimes helps to stop and re-evaluate
your position.

That's strange. Even Einstein found himself in that position.

Einstein re-evaluated his position many times. In fact, in his later papers, he
expressed doubts about the validity of much of his work.






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----