A managed access system is for mobile wireless devices (MWDs) in a facility geographically within a wireless communications network of a communications carrier. The system may include at least one RF antenna arranged at the facility and including an RF launch structure, and an elongate electrical conductor having a proximal end extending through the RF launch structure and a distal end spaced apart from the RF launch structure to define an elongate RF coverage pattern. The system may further include radio equipment coupled to the at least one RF antenna, and a management access controller cooperating with the radio equipment to communicate with a given MWD in the elongate RF coverage pattern within the facility, block outside communications via the wireless communications network when the given MWD is an unauthorized MWD, and provide outside communications via the wireless communications network when the given MWD is an authorized MWD.

A corrugated feed horn for antenna has an oval pattern of corrugations, and a series of intermediate ridges spaced between adjacent corrugation ridges only in the regions of the slots near its major axis. The intermediate ridges provide a feed horn that is capable of producing a relatively uniform oval beam, and has enough corrugations per wavelength to guarantee little diffraction on the edges of the horn, thus resulting in an antenna with very low side lobes.

A compact broadband circularly polarized antenna includes an antenna body, wherein a cavity is formed in the antenna body, a plurality of ridges and a plurality of baffles are formed inside the cavity, the ridges are configured for antenna miniaturization and bandwidth widening, and the baffles are configured to form a spatial phase difference. In the present disclosure, the ridges of the circularly polarized antenna are divided into two parts, wherein the ridges located in a baffle mounting rectangular section and a front rectangular mounting section are configured for antenna miniaturization and bandwidth widening, and the baffles for forming a phase difference are arranged between the ridges located in the baffle mounting rectangular section. Through the above arrangement, the polarized antenna may be miniaturized, operate in a millimeter wave band, and achieve circular polarization; the bandwidth of the antenna is relatively wide.

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.

A waveguide antenna with an antenna proximal side and an antenna distal side. A number of waveguide openings for transmitting and/or receiving electromagnetic signals to and/or from an environmental space is arranged at the antenna distal side. The waveguide antenna includes an antenna interface structure that includes interface waveguide apertures arranged in an interface carrying surface that extends transverse to a normal axis. Each interface waveguide aperture is coupled with at least one associated waveguide opening such that the respective interface waveguide aperture and the associated waveguide opening(s) are offset with respect to each other transverse to the normal axis. Each interface waveguide aperture and at least one coupled waveguide opening are configured for transmitting and/or receiving electromagnetic signals with respective polarizations rotated against each other. At least two neighboring interface waveguide apertures may be interlaced with each other, and/or the interface waveguide apertures may in each case enable a simultaneous and/or alternative transferring of at least two electromagnetic signals of different polarization, and/or the interface waveguide apertures may have different aperture orientations.

Methods and systems for detection of threats in secure areas are disclosed. Microwaves are transmitted into high traffic areas and are reflected off or transmitted through targets within that area. The resulting signals are detected at receiving antennas which are designed to have a high cross-polarization discrimination (XPD) such that co- and cross-polarizations of the resulting signals are separable for further processing. The receiving antennas of the present invention comprise elliptical antennas with a double-ridged waveguide on the interior and a conically-shaped exterior. This particular design for the receiving antennas allows to technologically obtain an XPD of about 30 dB or more for solid angles measured from a receiving antenna's boresight (the main lobe axis), and formed by rotating the corresponding 30-degree planar angle around the main lobe axis, the solid angles measuring approximately 0.84 sr, in a frequency range between 9.5 and 20 GHz.

A circularly polarized horn antenna can comprise a rectangular waveguide, a hexagonal waveguide connected to the rectangular waveguide, a first transition part connected to the hexagonal waveguide, and a horn connected to the first transition part. The horn can include a first corrugated inner surface, and the first transition part can include a second corrugated inner surface.

The present disclosure relates to an antenna system for wireless communication of data. In one implementation, the system includes at least four horn antennas. Each horn antenna may have a three-layered cavity, and each layer may be filled with dielectric. The system may further include two microstrip line networks. The microstrip networks may be between two adjacent layered portions and configured to communicate with the horn antennas.

A TEM line to double-ridged waveguide launcher and horn antenna are disclosed. The launcher uses multiple probes or one or more wide-aspect probes across the ridge gap to minimize spreading inductance and a TEM combiner or matching taper to match the impedance of the probes over a broad bandwidth. The horn uses a power-law scaling of gap height relative to the other dimensions of the horn's taper in order to provide a monotonic decrease of cutoff frequencies in all high-order modes. Both of these techniques permit the implementation of ultra-wideband designs at high frequencies where fabrication tolerances are most difficult to meet.

A waveguide device includes: a first electrically conductive member having a first electrically conductive surface and a second electrically conductive surface opposite thereto; a second electrically conductive member having a third electrically conductive surface and a fourth electrically conductive surface opposite thereto, the third electrically conductive surface opposing the second electrically conductive surface; a waveguide member on the third electrically conductive surface; and a plurality of electrically-conductive rods on the third electrically conductive surface. The method of producing a waveguide device includes: obtaining an intermediate product through a forming technique using one or more dies or molds, the intermediate product including the second electrically conductive member, the waveguide member, and the plurality of rods; and obtaining a finished product through a process including subjecting a portion(s) of the intermediate product to cutting, the finished product including the second electrically conductive member, the waveguide member, and the plurality of rods.