Abstract: An omni antenna assembly includes two antennas, a dipole antenna and a monocone antenna, to provide full spherical coverage. The dipole cavity for the dipole antenna forms one solid part with the monocone antenna. The monocone antenna also includes a monocone and a cylindrical shell connecting the dipole cavity to the monocone. A coaxial transition extends from the cylindrical shell to a matching network. The antenna assembly may be fabricated using additive manufacturing technology.

Abstract: An antenna system comprises an antenna element, a base plate, and a ground plane. The antenna element is configured to radiate signals, receive signals, or radiate and receive signals. The base plate has a front surface facing the antenna element and a rear surface facing away from the antenna element. The front surface of the base plate has an uncovered area, and the uncovered area of the base plate has no exposed conductive mechanical joints. The ground plane has a front surface facing the antenna element and a rear surface facing away from the antenna element. The antenna system further comprises a capacitive coupling between the base plate and the ground plane formed by an overlap region between the base plate and ground plane. The ground plane is capacitively coupled to the base plate in the overlap region.

Abstract: A helix radiating element is disclosed. The helix radiating element includes a support, a base and a helix wire. The support is made up of a dielectric material including a PEEK (Polyetheretherketone) material. The base is coupled to the support and is made up of boron nitride. The helix wire is configured to be wrapped around the support and bonded to the base. The base is coupled to a ground plane. A boron nitride filled adhesive is used to bond the support to the base and bond the helix wire to the base. The boron nitride filled adhesive is also used to bond the base to the ground plane. Heat generated in the helix wire is transferred to the ground plane via the base.

Abstract: A tunable RF cavity resonator having reduced generation of passive inter-modulation, the tunable RF cavity resonator including a cavity body, a fixed tuning post at a first end of the cavity body, a dielectric rod in the fixed tuning post interior space with a first spatial gap between the dielectric rod outer surface and the fixed tuning post inner wall, a tuning screw connected to a first end of the dielectric rod, and a tuning element disposed on a second end of the dielectric rod so that the tuning element moves within the interior space of the fixed tuning post while maintaining a second spatial gap between the tuning element outer surface and the fixed tuning post inner wall. Accordingly, the tuning element forms a short section of very low RF impedance transmission line thereby preventing RF signal leakage through the interior space of the fixed tuning post.