Design of dual band microstrip key patch antenna for aeronautical mobile and broadcasting applications

This paper proposes the design of a similar key shaped patch antenna intended for aviation purpose and can also be used by International Broadcast stations. The design uses a FR4 epoxy substrate having a relative permittivity of 4.4 and a thickness of 1.6 mm. The numerous advantages offered by the utilized probe feeding technique includes simple fabrication and easy match, provides low spurious radiations and is simple to matching by controlling the position. The antenna offers a dual band resonance at 10.05 GHz and 21.68 GHz with respective peak gains of 34 dBi and 22.6 dBi offering bandwidths of 93 MHz and 3.47 GHz respectively. The 93 MHz can thus be used for broadcasting, standard time and frequency signal (10 MHz), space research and aeronautical mobile while the 3.47 GHz bandwidth on the other hand can be used for fixed mobile, amateur satellite, broadcasting, aeronautical mobile and maritime mobile.