Wideband VHF/UHF antennas for UAV platform with RCS approach

A variety of wideband antennas, including a blade antenna, a Monocone antenna, and a number of Wireframe permutations of the Monocone antenna are simulated on an aircraft wing using the FEKO electromagnetic simulation software. A detailed design for a loaded wire-frame monocone antenna for direction-finding applications on an Army UAV platform is presented. This was used to compare simulation and measurement results of radiation-pattern and gain measurements for a scaled prototype mounted on a UAV wing, using the FEKO electromagnetic-simulation software. The results indicated that this antenna design offers bandwidth and gain performance that is far superior to many other passive antenna candidates. The results also confirm the accuracy and efficiency of using FEKO for modeling candidate antennas integrated onto large-scale Army platforms. Proposed antennas are very useful for aircraft, spacecraft application because they can be very conveniently mounted on the skin of aircraft or spacecraft. Here we simulate & compare the antenna performance from 150 MHz to 500 MHz These antennas gives good result in VHF/UHF frequency spectrum.