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
- posted
16 years ago