A multiband antenna comprises a dielectric substrate with a first surface defining an annular ledge and a central recess with a plurality of pockets. A MIMO radiator body is disposed in the central recess having a first surface defining a plurality of lobes which are disposed in respective ones of the plurality of pockets and having a second surface defining an outer rim and a central shelf. A radiator ring is disposed at the annular ledge so that the radiator ring and the outer rim converge along an annular gap therebetween. A plurality of MIMO feed lines provide external connection to respective lobes. The MIMO radiator body and the radiator ring provide a substantially horizontally-directed radiation pattern (e.g., for terrestrial signals). At least one low-profile radiator on the central shelf provides a substantially circularly polarized or vertically-directed radiation pattern for receiving signals radiated from a satellite.

The present invention discloses a new dual polarized array waveguide antenna configured above a signal processing substrate and sequentially including an antenna array substrate, a coupling substrate and a waveguide body. The antenna array substrate includes a plurality of patches, each of which having a first coupling portion and a second coupling portion coupled to the signal processing substrate. The top surface of the coupling substrate includes a plurality of coupling pads corresponding to the patches, and each coupling pad is configured above an intersection area of the first coupling portion and the second coupling portion. The waveguide body includes a plurality of waveguide channels passing through the waveguide body and corresponding to the coupling pads. Each waveguide channel has a first ridge pair and a second ridge pair projecting from wall surfaces. Each of the first ridge pair and the second ridge pair has a tapered opening portion withdrawn toward the wall surface of the waveguide channel on an upper section of the waveguide channel. Accordingly, signal transmission quality is improved by the structural arrangement above.

An antenna horn includes a waveguide having an open end and an end allowing access to transmitted signals, the widest opposite walls constituting a first pair of walls, two first ridges inside the waveguide, in the middle and over the whole length of the walls of the first pair of walls, a flat central wall connecting the walls of the second pair of walls at their midpoints at the level of the accesses, stopping in the direction of the open end so as to polarize signals transmitted by the two accesses according to orthogonal circular polarizations, and forming two ridges in the middle of the walls of the second pair of walls from the side of the open end, and with an antenna, an item of radio communication equipment and a method using the horn.

Some embodiments of the present disclosure provide a miniaturized horn antenna suitable for ultra-wideband measurement, and relates to the technical field of horn antennas. The antenna includes a horn antenna body, a coaxial connector and a mounting base, wherein the horn antenna body includes an upper plate, a lower plate, a side plate and a cover plate which are provided with ridges, mounting seats being formed on front and rear sides of an upper half cavity and a lower half cavity, several threaded holes being provided in the mounting seats separately, an upper mounting groove and a lower mounting groove being formed between the mounting seats of the upper plate and between the mounting seats of the lower plate respectively, the upper mounting groove and the lower mounting groove jointly forming a mounting space of a protrusion part at a left end of the cover plate.

The present invention discloses a new single polarized array waveguide antenna adapted to be configured above a signal processing substrate, and including an antenna array substrate and a waveguide body. The antenna array substrate includes a plurality of antenna units, each of which having a coupling portion and an impedance matching portion. The waveguide body is configured above the antenna array substrate, and includes a plurality of waveguide channels passing through the waveguide body. Each waveguide channel has a first ridge and a second ridge projecting from wall surfaces and arranged opposite to each other. The first ridge has a first lower withdrawn edge on a lower section of the waveguide channel, and the second ridge has a second lower withdrawn edge on the lower section of the waveguide channel. The first lower withdrawn edge is distanced from the antenna array substrate by a first matching height, and the second lower withdrawn edge is distanced from the antenna array substrate by a second matching height, wherein the first matching height is different from the second matching height. Accordingly, signal transmission quality is improved by the structural arrangement above.

A ring focus antenna system has an ultra-wide bandwidth for receiving and transmitting electromagnetic (EM) signals. The system includes a main reflector having an axis of rotation and a splash plate feed assembly consisting of a waveguide and a sub-reflector which is substantially aligned with the axis of rotation. The sub-reflector has surfaces that include segments of a displaced ellipse, having a first focal point which coincides with an ISO phase center located inside the waveguide and a second focal point located on a ring focus of the main reflector. A dielectric support for the sub-reflector has a shaped boundary which eliminates refraction at the dielectric-air interface. In one embodiment, the ultra-wide bandwidth includes EM frequencies belonging to Ku-band and Ka-band communication frequencies. The waveguide may be configured as a quad-ridged polarizing waveguide.

Technologies directed to a directional calibration antenna for calibration of an array antenna of a communication system are described. The communication system includes the array antenna which includes a number of antenna elements. The number of antenna elements are located in an area on a first side of a support structure. A directional antenna is located at a first height above a plane of the array antenna and at a periphery of the area. The directional antenna is pointed towards the array antenna and is located within a near field of the array antenna.

An antenna positioner provided on a deployable vehicle. The antenna positioner includes a base and a frame having a plurality of plates oriented at an angle relative to one another. Each plate may include a low band antenna and a high band antenna. The base is located inside a chamber of the deployable vehicle. The frame is movable relative to the base between a collapsed position, where the entire frame is positioned within the chamber, and an extended position wherein at least a portion of the frame extends outwardly through an opening in the deployable vehicle's exterior wall. The frame is pivotally engaged with the base and a gearing mechanism pivots the frame between the collapsed position and the extended position to arrange the antennas at a desired orientation relative to the deployable vehicle's exterior wall so as to maximize the antenna's near-vertical Field of View (FoV).

Radiofrequency module, including: a first layer including an array of radiating elements, each radiating element having a cross section for supporting at least one wave propagation mode, a second layer forming an array of waveguides; a fourth layer forming an array of ports; the second layer being interposed between the first and the fourth layer; each waveguide being connected to a port on the one hand and to a radiating element on the other hand for transmitting a radiofrequency signal between this port and this radiating element; the spacing between two ports being different from the spacing between the radiating elements, so that the surface area of the first layer is different from the surface area of the fourth layer; the waveguides being curved.

A plurality of tapered core waveguides which may be configured as a spectral component splitter, a spectral component combiner, and various combinations thereof, form a compact antenna array which may receive and/or transmit energy, act to form and steer a transmitted beam, act to discern received signals, and offer capability of multi frequency operation as well as controlled polarization.