Hi,Regarding the posts on the subject of "Skewplane Antennas"  - Some interesting reading and details may be found on the following web site :   www.vk6ysf.com/skew_planar_wheel_antenna.htmYou might also like to follow up the many studies and publications available in respect of the uses for aircraft, satellites and of course rovers on interplanetary missions.Ken EatonGW1FKY