Hi Mike,

That is a very complex subject. I would go to the library and check out a
good book on antenna theory. "The ARRL Antenna Book", while aimed at amateur
radio operators would still provide you with more theory than you're likely
to even need to know. An excellent book!

--
HTH,
Curt

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"amdx" wrote in message
...
| I've posted a picture on alt.binaires.schematics.electronic
| to an effort to help me get a better understanding of an antenna.
| It is a 2.4Ghz antenna about 18" long
| The driven element is a copper ribbon 0.2" wide by 0.032" thick.
| The copper ribbon forms a loop about 2" wide by 0.625" tall.
| The gap in the ribbon would be 0.020", but note; in the pictures
| a moon shaped piece has been cut from both ends. I think this
| moon cut effectively make the gap look larger.
| The total coax length is 2.350", the shield a bit shorter at 2.08".
| There are 4 toroids on the coax. These are under a piece of heat
| shrink, so I have no idea what material they would be.
| All element spacings are all equal and element lengths are within
| .030" of each other. I think they were designed to be the same but
| manufacturing tolerances made the differences. The reflector is longer.
| So now what can the group tell me about;
| Driven element impedance
| the gap
| coax length impedance transformation
| the 4 toroids
| Thanks for the help, if you need any other details let me know.
| Mike
|
|