Ultra-wide band antenna attachable on UAV surface

In the present study, ultra-wide band antenna attachable on unmanned aerial vehicle (UAV) surfaces usable as signal detection antenna in various bands was designed, and the practicality of the developed antenna was verified by attaching the antenna to a UAV and measuring the performance. The antenna suggested in this article was manufactured by forming a hemispheric conductor having the shape of a baseball seam on the ground and satisfying a self-complementary through an image theory. This Hemispheric shape can reduce a drag and risk of breakage. The diameter of the antenna is 400 mm (0.4 lambda(L) and lambda(L) is 0.3 GHz.), the height is 200 mm (0.2 lambda(L)), and the ground size is 800 mm (0.8 lambda(L)) x 800 mm (0.8 lambda(L)). The designed antenna showed an ultra-wide band property as it was matched to a band from 300 MHz to 10 GHz. After being attached to the bottom of a 7.3:1 scale UAV, the antenna showed matching properties from 1.85 to 10 GHz above and maintained a monopole pattern in all directions and in a bandwidth. To author's knowledge, the antenna was proper to using as a signal detection antenna which need wide bandwidth, conical pattern, drag reduction and reduced risk of breakage.