This antenna was created by radio amateurs Mike Willis G0MJW (http://www.mike-willis.com), Remco den Besten PA3FYM (https://twitter.com/remcodenbesten) and Paul Marsh M0EYT to work through the cross-band transponder of geostationary satellite OSCAR-100 and can be installed in the focus of an antenna dish. In fact, it combines two antennas: Uplink transmitting antenna (2400 MHz) - circularly polarized patch antenna (LHCP) The transmitting antenna is made of 1 mm thick brass sheet. The elements are precisely cut with the help of a laser. The distance between the two elements is 3.00 mm The antenna connector is SMA (female). Downlink antenna for 10500 MHz - horn antenna with circular polarization and dielectric focusing lens. A rigid copper tube with an outer diameter of 22 mm was used to make the receiving antenna, used in the construction of heating and water supply systems. The copper tube is slipped on the tube of the receiving converter (LNB), after the existing irradiator is carefully cut off on the converter (see the photos below). The diameter of the LNB coincides with the inner diameter of the copper pipe at a wall thickness of 0.8 mm. If you use a thicker pipe - there will be difficulties in assembling.