Abstract: Methods, systems, and devices for a dual-polarized antenna array are described. An example antenna array may include a parallel plate polarizer that may include upper and lower plates. The antenna array may include stepped septums extending between the plates, each of the stepped septums having a first and second side surfaces, the stepped septums comprising first and second sets that are inverted relative to each other. The antenna array may include a first divided waveguides associated with a first polarization that may have a first set of opposing walls formed by first portions of the upper and lower plates and a second set of opposing walls. The antenna array may include second divided waveguides associated with a second polarization that may have a first set of opposing walls formed by second portions of the upper and lower plates and a second set of opposing walls.

Abstract: In an example embodiment, an airborne radio frequency (RF) antenna device can comprise: a radiating portion; a waveguide portion connected to the radiating portion; a desiccant airflow channel; and an internal air volume located within the RF antenna device and associated with the desiccant airflow channel. The desiccant airflow channel can be integral with the RF antenna device. The internal air volume can be vented to the environment outside of the RF antenna device through the desiccant airflow channel.

Abstract: In an example embodiment, an airborne radio frequency (RF) antenna device can comprise: a radiating portion; a waveguide portion connected to the radiating portion; a desiccant airflow channel; and an internal air volume located within the RF antenna device and associated with the desiccant airflow channel. The desiccant airflow channel can be integral with the RF antenna device. The internal air volume can be vented to the environment outside of the RF antenna device through the desiccant airflow channel.