Dual band microstrip caution patch antenna for space applications

The design of a dual band microstrip Caution Patch antenna useful for private land mobile and aviation applications has been proposed in this paper. Under these applications, the design may encompass fixed satellite services, mobile except aeronautical mobile, radiolocation and aeronautical radio navigation. The FR4 epoxy substrate having a relative permittivity of 4.4 and a thickness of 1.6 mm is used. The utilized probe feeding technique is simple to fabricate and match, provides low spurious radiations and is simple to match by controlling the position. The antenna resonates with a peak gain of 6.3 dBi at 3.52 GHz offering a bandwidth of 111.9 MHz and yet another at 4.39 GHz with a gain of 20.4 dBi and a bandwidth of 8.02MHz.