"Jeff" napisal w wiadomosci
...
On 08/07/2012 10:23, Szczepan Bialek wrote:
napisa³ w wiadomo¶ci
...

You were totally unable to understand something as simple as:

http://en.wikipedia.org/wiki/Dipole_antenna

"The quarter wavemonopole antenna is a single element antenna fed at one
end, that behaves as a dipole antenna."

Are you able to understand something as simple as the above?


To be precise, only end fed monopoles need a counterpoise.

The radials serve as the counterpoise.

The Author in Wiki describes the "dipole" used by radio-amateurs.
Such dipole is simply "The quarter wavemonopole antenna".
S*


No It doesn't, it describes a monopole as as dipole using the image in the
ground as the second leg!!

But what is does show is a dipole with one arm connected to the braid of a
coax!!!! Which of course you ignored!!!!!

The braid = the shield.

The braid and the arm are together the counterpoise.

Have you the same voltages on the braid and on the coax "live" wire?

If not, than you heve the monopole. But it is nothing wrong if in your
community it is call "dipole".
S*

Szczepan Bialek wrote:
The braid = the shield.

The braid and the arm are together the counterpoise.

Have you the same voltages on the braid and on the coax "live" wire?

If not, than you heve the monopole. But it is nothing wrong if in your
community it is call "dipole".
S*

You seem to think that the braid of the coax is a ground and the
voltage there is always zero.

But that is not how things work.

A length of cable, whatever cable it is, is not a short circuit on HF.

"Szczepan Bialek" wrote in message
...
If not, than you heve the monopole. But it is nothing wrong if in your
community it is call "dipole".
S*

Hello Szczepan. The monopole and dipole aerials are definitely two different
aerials and it would be wrong to call a monopole a dipole.
It seems that you need some help to understand aerials. The ARRL
(http://www.arrl.org/shop/Antennas/ ) and RSGB
(http://www.rsgbshop.org/acatalog/Onl...tennas_37.html) both
sell helpful books on aerials.

Kindest regards, Ian.

"Ian" napisa³ w wiadomo¶ci
...
"Szczepan Bialek" wrote in message
...
If not, than you heve the monopole. But it is nothing wrong if in your
community it is call "dipole".
S*

Hello Szczepan. The monopole and dipole aerials are definitely two
different
aerials and it would be wrong to call a monopole a dipole.

Monopole antenna: "One side of the antenna feedline is attached to the lower
end of the monopole, and the other side is attached to the ground plane,
which is often the Earth."

Dipole antenna: "A dipole antenna is a straight electrical conductor
measuring 1/2 wavelength from end to end and connected at the center to a
radio-frequency (RF) feed line. This antenna, also called a doublet, is one
of the simplest types of antenna, and constitutes the main RF radiating and
receiving element in various sophisticated types of antennas. The dipole is
inherently a balanced antenna, because it is bilaterally symmetrical.
Ideally, a dipole antenna is fed with a balanced, parallel-wire RF
transmission line"

The Hertz dipole was symmetrical.

The radio-amateurs use the name "dipole" for a monopole.
It is not wrong because they do not use the name monopole.
S*

"Szczepan Bialek" wrote in message
...

"Ian" napisa³ w wiadomo¶ci
...
"Szczepan Bialek" wrote in message
...
If not, than you heve the monopole. But it is nothing wrong if in your
community it is call "dipole".
S*

Hello Szczepan. The monopole and dipole aerials are definitely two
different
aerials and it would be wrong to call a monopole a dipole.

Monopole antenna: "One side of the antenna feedline is attached to the
lower end of the monopole, and the other side is attached to the ground
plane, which is often the Earth."

Dipole antenna: "A dipole antenna is a straight electrical conductor
measuring 1/2 wavelength from end to end and connected at the center to a
radio-frequency (RF) feed line. This antenna, also called a doublet, is
one of the simplest types of antenna, and constitutes the main RF
radiating and receiving element in various sophisticated types of
antennas. The dipole is inherently a balanced antenna, because it is
bilaterally symmetrical. Ideally, a dipole antenna is fed with a balanced,
parallel-wire RF transmission line"

The Hertz dipole was symmetrical.

The radio-amateurs use the name "dipole" for a monopole.
It is not wrong because they do not use the name monopole.
S*

Hello Szczepan.
Your definition of a dipole is wrong. A dipole is not a "straight electrical
conductor measuring 1/2 wavelength ".

Szczepan Bialek wrote:

napisa? w wiadomo?ci
...

You were totally unable to understand something as simple as:

http://en.wikipedia.org/wiki/Dipole_antenna

"The quarter wavemonopole antenna is a single element antenna fed at one
end, that behaves as a dipole antenna."

Are you able to understand something as simple as the above?

Yes, and obviously you can not.

What it means is the total FIELD is the same as if the antenna were a dipole.

Nothing more, nothing less.

To be precise, only end fed monopoles need a counterpoise.

The radials serve as the counterpoise.

The Author in Wiki describes the "dipole" used by radio-amateurs.
Such dipole is simply "The quarter wavemonopole antenna".

A dipole is a dipole is a dipole and it doesn't matter who is using it.

A dipole is NOT "The quarter wavemonopole antenna".

A dipole is a dipole is a dipole.

You STILL can not understand the difference and you never will as you are
an ineducable idiot.

How many antennas have you built in your lifetime?

Szczepan Bialek wrote:

"Jeff" napisal w wiadomosci
...
On 08/07/2012 10:23, Szczepan Bialek wrote:
napisa? w wiadomo?ci
...

You were totally unable to understand something as simple as:

http://en.wikipedia.org/wiki/Dipole_antenna

"The quarter wavemonopole antenna is a single element antenna fed at one
end, that behaves as a dipole antenna."

Are you able to understand something as simple as the above?


To be precise, only end fed monopoles need a counterpoise.

The radials serve as the counterpoise.

The Author in Wiki describes the "dipole" used by radio-amateurs.
Such dipole is simply "The quarter wavemonopole antenna".
S*


No It doesn't, it describes a monopole as as dipole using the image in the
ground as the second leg!!

But what is does show is a dipole with one arm connected to the braid of a
coax!!!! Which of course you ignored!!!!!

The braid = the shield.

No ****?

What a stroke of irrelevant brilliance.

The braid and the arm are together the counterpoise.

No, they are not, you babbling idiot.

Have you the same voltages on the braid and on the coax "live" wire?

Not without a ballancing device of some sort.

If not, than you heve the monopole.

What an utter idiot; a monopole has one physical element while a dipole
has two physical elements.

That is the meaning of the prefixes "mono", which means one, and "di",
which means two.

You are a babbling, ineducable, idiot.

How many antennas have you built in your lifetime?

Szczepan Bialek wrote:

"Ian" napisa? w wiadomo?ci
...
"Szczepan Bialek" wrote in message
...
If not, than you heve the monopole. But it is nothing wrong if in your
community it is call "dipole".
S*

Hello Szczepan. The monopole and dipole aerials are definitely two
different
aerials and it would be wrong to call a monopole a dipole.

Monopole antenna: "One side of the antenna feedline is attached to the lower
end of the monopole, and the other side is attached to the ground plane,
which is often the Earth."

Yes, and there in ONE element.

Dipole antenna: "A dipole antenna is a straight electrical conductor
measuring 1/2 wavelength from end to end and connected at the center to a
radio-frequency (RF) feed line. This antenna, also called a doublet, is one
of the simplest types of antenna, and constitutes the main RF radiating and
receiving element in various sophisticated types of antennas. The dipole is
inherently a balanced antenna, because it is bilaterally symmetrical.
Ideally, a dipole antenna is fed with a balanced, parallel-wire RF
transmission line"

Yes, and there are TWO elements.

The Hertz dipole was symmetrical.

A dipole is symmetrical by definition, idiot.

The radio-amateurs use the name "dipole" for a monopole.

No, they do not, you babbling, ineducable idiot.

It is not wrong because they do not use the name monopole.

It is nonsense because radio amateurs do NOT call a monopole a dipole.

You are a babbling, ineducable idiot.

How many antennas have you built in your lifetime.

Szczepan Bialek wrote:

napisa? w wiadomo?ci
...
Szczepan Bialek wrote:


The Marconi antenna is vertical. It consists of an antena and the
counterpoise. The counterpoise can be in form of the vertical wire. So
such
monopole is vertical.


The "dipole" antenna with the coax and without the balun is exactly like
te
above set.

No, it is not as the generally used meaning of the word "dipole" without
any qualifiers is a half wave, center fed antenna

Radio-amateurs have "dipole" where one leg is end fed and the other is
connected to the grounded shield of the coax.

A dipole is fed with a balancing device of some sort between the
transmission line and the antenna of the transmission line is unbalanced.

Than is how EVERYONE does it, not just radio amateurs.

And the shield of the coax is often NOT grounded nor is it required to be
grounded for the antenna to operate properly.

If it is grounded, it is for OTHER reasons than antenna operation such
as electrical safety or the elimination of static build up, which has
absolutely NOTHING to do with the antenna operationg as an antenna.

You should know that the true dipole is directional.
Are your "dipoles" directional?

Dipoles are not directional, they are bidirectional in the plane of the
antenna and ALL dipoles are bidirectional in the plane of the antenna.

You are a babbling, ineducable, idiot.

How many antennas have you built in your life time?

Szczepan Bialek wrote:

"Rob" napisa? w wiadomo?ci
...
Szczepan Bialek wrote:

You should write "dipole". In NASA their dipole and your"dipole" are the
quite different things.

What do you mean with "In NASA"?

"The Hertzian dipole Consider two small spherical conductors connected by a
wire. Suppose that electric charge flows periodically back and forth between
the spheres."

In " NASA" antennas (eg. phase radars) the each "sphere" is fed from special
feeder.

Phased radars don't use spheres for antennas.

This is just babbling nonsense.

If are the two sphere we have a dipole (Hertzian dipole).

No, we don't; you are an idiot.

In Marconi antenna is only one "sphere". It is the monopole.
Do you have exactly the same voltages in the both ends of your "dipole"?
S*

This is all just babbling nonsense with no relation to the real world.

You are a babbling, ineducable, idiot.

How many antennas have you built in your lifetime?