Design and analysis of uwb antenna for use in aeronautical radio navigation

Air radio navigation and fixed satellite communication from Earth to space may need special characteristics like ultra-wideband antenna technology, UWB.UWB was initially developed for military application, but today it is used to many other applications like transfer of data from digital camcorders and wireless printing of digital pictures. In this context, high frequency performance and low-profile antennas may be required. As example, the use of Micro strip antennas. These antennas have low cost, and are widely used due to the advantages such as reduced weight and size, low fabrication cost and easy installation. This paper presents the design and analysis of UWB antenna for military use. Specifically, in air radio-navigation services with frequency band between 15.4GHz and 15.7GHz. The focus was to construct and simulate an antenna with the characteristics of an ultra-wide band, along with a low return loss in the desired resonance frequency. Simulations were made using specific software with small modifications in the proposed antenna. Results indicated that small changes can show differences in important antenna parameters. It was concluded that the adaptation of the standard antenna with a half circular ring is capable to improve its parameters.