A Novel Multifunctional E-Plane Metal Septum-Based Filtering Horn Antenna

In this letter, we have presented a novel multifunctional E-plane metal septum-based filtering horn antenna in rectangular waveguide technology. The proposed design methodology is systematic and scalable to realize higher-order filtering responses. For the validation of the concept, a 4th-order filtering E-plane horn antenna is designed, fabricated and tested at 10 GHz with a fractional bandwidth of 2% and a realized gain of 11 dBi. The realized gain of the filtering horn antenna is identical to that of the conventional horn antenna. The proposed design leads to significant savings in mass and volume and hence contributes to system miniaturization especially beneficial in aerospace applications.