An antenna includes a reflector and a waveguide assembly. The waveguide assembly includes a feed assembly and a support member that extends from behind the reflector to orient the feed assembly for direct illumination of the reflector. The waveguide assembly includes a first waveguide coupled to a first portion of a common waveguide, a second waveguide coupled to a second portion of the common waveguide, and a septum layer that includes a septum polarizer coupled between the common waveguide and the first and second waveguides.

The present disclosure relates to antennas. One example antenna includes a reflective device, at least two radiating arrays whose operating bands are in a first preset frequency band, and a plurality of parasitic radiators. Each radiating array of the at least two radiating arrays includes a plurality of radiating elements. Each radiating array of the at least two radiating arrays is electrically disposed on the reflective device along a length direction of the reflective device, and the plurality of parasitic radiators are disposed between two adjacent radiating arrays in the at least two radiating arrays.

The present disclosure relates to antennas. One example antenna includes a reflective device, at least two radiating arrays whose operating bands are in a first preset frequency band, and a plurality of parasitic radiators. Each radiating array of the at least two radiating arrays includes a plurality of radiating elements. Each radiating array of the at least two radiating arrays is electrically disposed on the reflective device along a length direction of the reflective device, and the plurality of parasitic radiators are disposed between two adjacent radiating arrays in the at least two radiating arrays.

An antenna communication architecture and a method for simultaneous optimal tracking of multiple broadband satellite terminals in support of in theatre operations and rapid deployment applications, and methods in relation therewith. This communication architecture is especially suitable for implementation as a hosted payload configuration on a host spacecraft.

A method for achieving multiple beam radiation vertical orthogonal field coverage by means of multiple feed-in dish antenna, comprising using a total metallic disc and plural feed-in antenna components, wherein it is possible to generate multiple sets of radiation beams by applying multiple sets of feed-in antenna components, and the coverage ranges created by different radiation beams may uniformly distribute there between so as to generate multiple communication service coverage areas. Moreover, since the field formed by the reflection of the total metallic disc is characterized in vertical orthogonality, advantages such as effectively increased coverage, improved energy utilization and radiation beam switches or the like can be provided.

Various embodiments provide an antenna hitch mount for securing an antenna, such as a satellite dish, to a vehicle. According to one embodiment, the hitch mount includes a hitch mounting portion, a plate, and an antenna mounting portion. The hitch mounting portion is configured to be inserted in to a hitch. The hitch mounting portion includes holes that are on opposite sides of the hitch mounting portion and are aligned with each other. The plate is used to couple the hitch mounting portion and the antenna mounting portion to each other. The antenna mounting portion is configured to support an antenna. Namely, an antenna is secured to the antenna mounting portion by a fastening device, such as a mast clamp.

An antenna for wireless communication includes a spherical reflector and one or more feeds. The spherical reflector includes an inner portion made of material that reflects radiofrequency (RF) beams, and an outer portion positioned on an edge of the inner portion, the outer portion being made of metamaterials that can be controlled to be reflective of or transparent to RF beams. The one or more feeds are configured to form one or more RF beams reflected off the spherical reflector. In some implementations, the antenna includes one or more processors configured to form one or more RF beams using the one or more feeds, and control at least a part of the outer portion of the spherical reflector to reflect an RF beam of the one or more RF beams or be transparent to the RF beam based on the one or more RF beam.

A millimeter-wave optical imaging system including an imaging detector located at a focal plane of the optical imaging system, the imaging detector being responsive to electromagnetic radiation in wavelength range of approximately 5-50 millimeters, an immersion lens directly coupled to the imaging detector and configured to focus the electromagnetic radiation onto the imaging detector, wherein the focal plane is located on a planar surface of the immersion lens and the imaging detector is directly coupled to the planar surface, a positive power primary mirror configured to reflect the electromagnetic radiation towards the immersion lens, and one of a Fresnel lens or a diffraction grating configured to receive and direct the electromagnetic radiation towards the primary mirror.

At least one embodiment of the present invention includes an antenna system comprising a multifocal reflector having at least two reflecting segments having different curvatures defining at least two different spaced apart focal points, such that the multifocal reflector is configured and operable to receive radiation incident on the segments at different incident angles within a certain angular range, and reflect the incident radiation onto the at least two focal points in a focal axis, thereby creating focused radiation formed by at least two differently focused portions of radiation; a phased array feed antenna unit located perpendicularly to the focal axis and comprising a plurality of antenna elements for receiving/transmitting at least two differently focused portions, and a feed network connected to the plurality of the antenna elements for selectively actuating the antenna elements for performing electronic scanning of the space area aimed at detecting target.

A switchable antenna includes a substrate, a first antenna element, a second antenna element, a first switch element, a second switch element, a first radiating portion on an upper surface of the substrate including a first center, a first bend section and a second bend section, and a second radiating portion on an lower surface of the substrate including a second center, a third bend section and a fourth bend section. The third and the fourth bend sections extending from the second center are respectively disposed corresponding to the first and the second bend sections extending from the first center. The first and the second antenna elements on the upper surface are disposed corresponding to the first and the second bend sections. The first and the second switch elements are respectively configured to switch the first and the second antenna elements between a reflector and a parasitic radiating element.