I'm helping the SDSU mechanical engineering students with their Rocket.
See: http://www-rohan.sdsu.edu/%7esharring/sdsurocket.html

I've asked for help on this group before, but the response went over my head.
I a reasonably skilled EE, with ZERO antenna design experience.

I would like to design an antenna that was conformal with the rocket main tube.
The rocket is about 8" in diameter and all metal.

I need two antennas....
I have two channels a 70cm ATV transmitter and a 900Mhz non-ham telemetry radio.


For the last attempt:

Telemetry: I put two 1/4 wave verticals on opposite sides of the rocket fed them with a minicircuits splitter.
This worked well as I got data from lift off to impact.

ATV Last attempt I just had a single 1/4 wave dipole sticking out one side of the rocket.
As the rocket rolled the signal faded in and out.


The last time I asked this question I got a response that I could not use because I did not understand it.

So I'm looking for someone to help that can do the detail design.

IE provide instructions build a tobe with this pattern on it, hook up coax here and trim this spot to adjust SWR.
I'm perfectly willing to get the fabrication done, but the design is beyond me.

I realize that I'm asking a lot, but any one that wants to help with the antenna can have a
front row seat in the block house to watch it launch, and some cool video tape ;-)
(The launch will be at the MTA near Mojave, CA)

Paul (Kl7JG)