I modeled (EZNEC4+) a dipole using 6.1 inches (over all) of #20 wire. SWR computed 1.62 to 1.43 over 890 to 910 mhz. My conclusion: do not worry about swr or balancing the feed. Do not worry about copper foil, #20 wire under any tape will work fine. IF this is a Radio Control model the telemetering transmitter is way more powerful than most RC transmitters. A demo copy of EZNEC will do all the dipole modeling you need. John Ferrell W8CCW "Life is easier if you learn to plow around the stumps" http://DixieNC.US ----- Original Message ----- From: "Zik Saleeba" To: "Microcontroller discussion list - Public." Sent: Wednesday, June 20, 2007 7:49 PM Subject: [EE] Feeding a dipole >I have an RF question which has been bothering me for a while. I have > a 900MHz 1W transceiver module which I'm planning to put in a model > plane for telemetry purposes. Every gram counts so rather than using > an off-the-shelf antenna I'm planning to make a dipole from conductive > foil tape stuck to the wing. I have a small amount of experience with > VSWR meters so I think I can get that part of the system working > pretty well. > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist