Broadband Conformal frequency independent Antenna for Airborne Applications

Broadband antennas are currently very appealing for airborne [1] applications. However, due to the requirements for conformality, flexibility, and robustness, antenna design for such applications is difficult. Conformal antennas that can be mounted on any arbitrary curved surface have garnered increased attention in recent years. The utility of these antennas for a missile or unmanned aerial vehicle is one of the most influential aspects of their significance. The primary goal of creating conformal antenna structures is to achieve omnidirectional azimuthal coverage. The antenna must typically be low profile and flexible in order to achieve a perfect attachment to a given surface. As a result, printed antennas have become the most commonly used form in the design of microwave conformal antennas [2,3]. Spirals and helices are used in the literature to achieve broadband characteristics with circular polarization. Indeed, spiral antenna designs, on the other hand, are easily realized using PCB technology and readily conformable.