[Antennas] Only dumb question is the one not asked
Deon Erwin
Deon Erwin" <[email protected]
2002年3月30日 11:44:38 +0200
----- Original Message -----
From: Dan Richardson <[email protected]>
To: <[email protected]>
Sent: Saturday, March 30, 2002 4:30 AM
Subject: Re: [Antennas] Only dumb question is the one not asked
| At 05:26 PM 3/29/2002 -0800, you wrote:
| >At 06:41 PM 2002年03月29日 -0600, [email protected] wrote:
| >>RF current flowing on the outside of a coaxial feedline is
| >>not a normal situation. It is caused by an abnormal
| >>condition. You get that by connecting a balanced antenna
| >>(dipole) to an unbalanced feed line (coax).
||| Huh? Then why is that RF chokes (baluns if you like) are used on
monopoles?
| The fact that an antenna is balanced or not does not remove the need for
| stopping the unwanted current from flowing on the outer shield of coax.
|| Danny, K6MHE
A monopole (vertical) is also a balanced antenna: The radiator and radials
form a balanced antenna.
A vertical antenna is simply a dipole with the center conductor element
running vertical and the braid element running horizontal. Thus, the same
balun theory for a dipole would apply to a vertical.
Deon ZR1DQ
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