A Multi-Functional Circularly Polarized All Pole Filtering Conical Horn Antenna

In this paper, we present a circularly polarized filtering conical horn antenna for aero-space communication applications. This filtering antenna basically includes the functionality of a band pass filter and a circularly polarized conical horn antenna within a single component. This not only leads to a small form factor (reduced size due to functional integration) but also eliminates additional losses like cascaded mismatch loss and hence enhancing the performance of the transceiver system. The proposed 4th order filtering antenna is realized at 11.2 GHz with a bandwidth of 350 MHz and realized gain of 8.1 dBi.