Abstract: An antenna assembly of PCB layers and waveguide layers includes a driven PCB layer with an array of unit cells. Each cell includes a central first element (e.g., a receive patch) and four second elements (e.g., transmit patches) evenly spaced around the first element in a square configuration. Distances between adjacent aligned first elements are equal, and less than the first elements' operating frequency. Distances between adjacent aligned second elements are equal, and less than the second elements' operating frequency. First and second combiner layer conductively couple first elements and second elements, respectively, to one or more first or second combiner pads to facilitate interfacing the elements with waveguides. First and second waveguides formed into separate plates communicatively coupled to their corresponding combiner layer.

Abstract: A multibeam hemispherical X-band array inserts nulls at horizontal and near horizontal angles to suppress interfering signals, without degrading authentic signals arriving at other angles. The multibeam hemispherical array includes three annular (360) rows of antenna elements, each row having 64 elements. Elements of the first row, which have the smallest elevation angle, have pairs of circular patches coupled with a phase delay line. Each pair of circular patches is spaced apart from and aligned with two pairs of similarly shaped (circular) and sized parasitic directors. The spacing between driven patches of adjacent elements in a row is about equal to one half of the wavelength of the radiated wave. The array fits within a conventional 24-inch diameter marine radome.

Abstract: A low profile patch antenna surface mounted to a metal base produces superior gain in horizontal directions. A dielectric spacer and matching circuit are sandwiched between a thin circular patch radiator and an opposite ground plate, with the matching circuit between the spacer and ground plate and electrically coupled to the ground plate and radiator. The matching circuit increases antenna efficiency and bandwidth by attaining the best possible energy transfer between a transceiver and the antenna, taking into account impedance mismatch, component losses, and losses in the antenna structure.

Abstract: A low profile antenna assembly for an aircraft radome includes a reflector, a feed with a stacked array of septum polarizers, a mount, and a bracket. The feed, which includes bandpass and low pass filters, and broadwall branchline couplers, and the stacked array of septum polarizers, together determine polarization of the waves, attenuating unwanted signals and illuminating the entire reflector. The reflector comprises a portion of a parabolic reflector.

Abstract: A low profile antenna assembly for an aircraft radome includes a reflector, a feed with a stacked array of septum polarizers, a mount, and a bracket. The feed, which includes bandpass and low pass filters, and broadwall branchline couplers, and the stacked array of septum polarizers, together determine polarization of the waves, attenuating unwanted signals and illuminating the entire reflector. The reflector comprises a portion of a parabolic reflector.

Abstract: An aspect of the present invention relates to the manufacture and use of co-planner parasitic patch antennas. In embodiments, methods and systems involve providing an antenna, the antenna including a first substrate, a dielectric material, and a second substrate; positioning the first and the second substrate to be co-planar; providing the first substrate with at least one parasitic patch, the parasitic patch providing gain modification; providing the second substrate with at least one parasitic patch, the parasitic patch providing gain modification; and orienting the co-planar parasitic patches of the first substrate and the second substrate for a substantially directional gain pattern.

Abstract: A method and system of providing an antenna for a communications system is provided including providing a modular patch antenna having a substantially omni-directional gain pattern. A gain modifying facility provides for modification of the gain pattern along at least one s selected axis of the antenna. The modular patch antenna is for a mobile platform having a direction of motion where the gain pattern creates a substantially elliptical gain pattern. The gain is increased along an axis substantially perpendicular to the direction of motion.

Abstract: Disclosed are systems, methods, and an apparatus that includes a microstrip network disposed on a ground plane and including at least one collection point, where the collection point(s) is in electrical communication with the microstrip network, a probe associated with each collection point, the probe extending through at least one opening in the ground plane and in electrical communication with one or more transmission line(s), and, a physical perturbation associated with each probe, the physical perturbation integrated with the transmission line(s) to create at least a first and a second signal port in the transmission line(s).

Abstract: A feed network for, and method of feeding, an array of antenna elements has multiple feed points. Two feed lines extend from the feed points, one having a longer length that the other to provide a phase difference in the two feed lines. The feed lines split into main feed lines, which in turn split into secondary feed lines that connect to the antenna elements. The connections to the elements fed from one of the feed lines are rotated with respect to the connections to the elements fed from the other to provide another phase difference between the elements. The antenna elements may be fed from the longer of the feed lines from one of the feed points and the shorter of the feed lines from an adjacent feed point, with the connections from the feed points providing for right hand and left hand circular polarized elements, respectively.