High Frequency antennas can be delicate things, when you intend to launch them on a rocket you better hold on tight.
The picture shows one of our quadrifilar X-band antennas. Each individual subantenna has 8db gain, two doublings (4 total) give 2x3db extra, 1db implementation losses lead to 13db gain total.
The antenna supports up to 10 W transmit power which nicely suits our high data rate transmitters.