Hi! I would like to do an experiment by using a can size satellite(at 1km high from earth) to sense the extremely low frequency(elf) and measure the characteristic of this elf. So, I am searching for a suitable antenna to fix inside my can size satellite. But result is the antenna is extremely large as compared to my can size satellite. Any suggestion about the antenna? Or how to create a suitable antenna for this situation? I try to use loop antenna, but seem that it still larger than a can size.