Abstract: Antenna feed chains and methods are disclosed. An antenna feed chain, include a feed horn having a first cross-polarization performance over a solid angle of interest and a frequency band of interest and a polarizer having a second cross-polarization performance over the solid angle of interest and the frequency band of interest. The polarizer is coupled to the feed horn. The first cross-polarization performance of the feed horn compensates for the second cross-polarization performance of the polarizer over the solid angle of interest and the frequency band of interest.

Abstract: The present disclosure relates to an antenna mounting device and a base station antenna system. The antenna mounting device includes a hinge device and an adjustment arm. The hinge device is configured to be mounted to a pole by a clamp and configured to pivotally connect a base station antenna arrangement. The adjustment arm is configured to be mounted to the pole by a clamp and configured to connect the base station antenna arrangement. The connection of the hinge device with the base station antenna arrangement is located in a middle region of a longitudinal extension of the base station antenna arrangement [having a longitudinal extension] of a maximum of ? of the longitudinal extension of the base station antenna arrangement. A connection of the adjustment arm with the base station antenna arrangement is located in one of two end regions of the base station antenna arrangement.

Abstract: The disclosed invention provides a distributed directional aperture (DDA) system that is installed in a vertical lift aircraft that comprises a fuselage and a rotor system including rotary wings rotatably coupled to the fuselage. The DDA system provides capability to receive and/or transmit signals in one or more frequency bands, and provides communications, signals intelligence (SIGNINT), positional sensing, jamming, and offensive cyber on the vertical lift aircraft. The DDA system of the vertical lift aircraft includes a sensor and emitter array subsystem that includes a plurality of sensors and emitters distributed in the rotary wings, a beamformer subsystem that processes the sensor signals and emitter signals, and a telemetry subsystem that conveys signals between the sensor and emitter array subsystem and the beamformer subsystem.

Abstract: An apparatus is disclosed herein for a cylindrically fed antenna and method for using the same. In one embodiment, the antenna comprises an antenna feed to input a cylindrical feed wave and a tunable slotted array coupled to the antenna feed.

Abstract: Provided is a dual-polarized antenna. The dual-polarized antenna includes a horizontal radiating unit and a vertical radiating unit. The horizontal radiating unit includes a power divider and a Vivaldi oscillator array. The Vivaldi oscillator array includes multiple Vivaldi oscillator units uniformly distributed in a circumferential direction of the Vivaldi oscillator array. The power divider includes multiple output ports in one-to-one correspondence with the multiple Vivaldi oscillator units. The multiple output ports of the power divider are coupled to the multiple Vivaldi oscillator units in a one-to-one correspondence. The vertical radiating unit is disposed on one side of the horizontal radiating unit and includes a vertically-polarized oscillator.

Abstract: An antenna for a foldable electronic device which functions equally well in both folded and unfolded states includes a rotating shaft and a housing. The overall housing is made of metallic material and includes a first housing and a second housing. The first housing connects to the second housing through the rotating shaft. The housing further defines at least one group of slots to form at least one slot antenna. The at least one slot antenna crosses the rotating shaft and extends to the first housing and/or the second housing. By setting at least one slot antenna to correspond to the rotating shaft, the foldable electronic device achieves high radiation performance whether the first and second housing are folded or unfolded.

Abstract: There is disclosed an antenna system comprising: i) first and second antennas, the second antenna being disposed laterally from the first along a longitudinal axis, and ii) an isolation structure disposed between the first and second antennas. The isolation structure comprises a first resonator element having a first arm with upper and lower ends, the first arm connected to ground at its lower end, and a lateral second arm connected to the upper end of the first arm. At least a portion of the first resonator element is disposed adjacent to a portion of the first antenna such that the first resonator element is strongly coupled to the first antenna.

Abstract: Embodiments of the present disclosure provide methods, apparatuses, devices and systems related to the implementation of a multi-layer printed circuit board (PCB) radio-frequency antenna featuring, a printed radiating element coupled to an absorbing element embedded in the PCB. The embedded element is configured within the PCB layers to prevent out-of-phase reflections to the bore-sight direction.

Abstract: The present invention comprises an antenna system consisting of two generally co-axial near field antennas, one mounted around the circumference of a human head, the other mounted on the body. The preferred embodiment discloses the dimensions necessary to create a viable near field communications (NFC) channel with existing commercial off-the-shelf (COTS) NFC circuits to create a secure wireless link between the head and shoulders.

Abstract: An antenna assembly for receiving television signals on both very high frequency (VHF) bands and ultra high frequency (UHF) bands, the antenna assembly including: a main section including an elongated boom, at least one active element coupled to the boom, and at least one passive element coupled to the boom; a VHF section including a VHF boom configured to be coupled to a first longitudinal end of the boom and at least one active element coupled to the VHF boom; and a UHF section including a UHF boom configured to be coupled to a second longitudinal end of the boom opposite the first longitudinal end and a plurality of passive elements coupled to the UHF boom.

Abstract: A parabolic antenna includes a main disc, a transmitting device, and a reflecting member. The main disc has a main surface that is arc-shaped. The transmitting device is disposed on the main disc and includes a transmitter and a reflector. The transmitter corresponds to the reflector. The reflector has a reflecting surface that is arc-shaped and corresponds to the main surface of the main disc. The reflecting member is detachably engaged with the reflecting surface of the reflector and corresponds to the transmitter. By engaging the reflecting member with the reflecting surface of the reflector or detaching the reflecting member from the reflecting surface, the parabolic antenna could form various configurations and provide different reflecting performances.

Abstract: A remote antenna unit including at least one antenna configured to enable conversion between a digital signal and a radio signal; an external digital interface for providing the digital signal; and means for adapting performance of the antenna in dependence upon measurement of at least one parameter.

Abstract: An antenna capable of being joined to an antenna feed perpendicular to a ground plane includes a conductive radiator and a circular wafer surrounding the radiator. The radiator is tubular and has a longitudinal slot along the entire length thereof, parallel to the radiator's axis. The antenna feed can be connected across the slot. The wafer, made either or a conventional high dielectric isotropic material or of a uniaxial dielectric material, is spaced apart from the radiator and has a thickness approximately equal to the width of the slot, a diameter wherein a ratio of a diameter of the radiator to the diameter of the wafer is approximately 35%, and is located at a height above the ground plane equal to approximately 35% of the length of the radiator. The material of the wafer has a dielectric tensor with high polarizability in the axial direction and can be applied to preexisting antennas. This antenna gives enhanced bandwidth over ordinary slotted antennas.

Abstract: An antenna module configured for use on an underwater vehicle is disclosed. The antenna module includes an array of spiral antennas fabricated on a multi-layer substrate that provides wide-band RF communication with direction finding (DF) capability. The antenna module can also include other antennas fabricated on the same multi-layer substrate, such as one or more global positioning system (GPS) receivers, an ultra-high frequency/very-high frequency (UHV/VHF) antenna, or one or more iridium antennas. The antenna module may further include a water-proof housing that is coupled to the outside hull of an undersea vehicle via a coupling mechanism. The coupling mechanism allows the antenna module to rotate between a stowed position against the hull and a deployed position that extends the antennas out away from the undersea vehicle. The antenna module is curved or flexible so it can stow against a corresponding curved hull of the undersea vehicle.

Abstract: An electronic device that communicates a packet or a frame is described. This electronic device includes: at least an antenna having an antenna radiation pattern; an interface circuit; and an antenna cover that includes an integrated static lens, where the antenna cover is selected from a set of antenna covers that includes different integrated static lenses. During operation, the interface circuit may transmit, from the antenna, wireless signals corresponding to the packet or the frame, where the integrated static lens modifies the antenna radiation pattern of the antenna. For example, the integrated static lens may cause the wireless signals to converge or diverge. Alternatively, the integrated static lens may change an angular elevation of the antenna radiation pattern and/or may provide a correction for pathloss as a function of angle. Note that the integrated static lens may be a stepwise approximation to a predefined function.

Abstract: An array antenna system having an RF-port with individually controlled radiating elements.

Abstract: A waveguide polarizer for converting between a linearly polarized electromagnetic field in a first waveguide and a circularly polarized electromagnetic field in a second waveguide is provided. The waveguide polarizer includes a structure interconnecting the first and second waveguide which includes a waveguide excitation arrangement with a bifilar helical shape. A circularly polarized antenna arranged to be connected to the first waveguide of the waveguide polarizer and a satellite arrangement are also provided.

Abstract: A filter-antenna and a method for making a filter-antenna. The filter antenna includes a microstrip antenna, such as a patch antenna, integrated with an absorptive (e.g., bandstop) filter for absorbing or dissipating energy.

Abstract: Configurations of an electronic communication device, an electronic device or an antenna structure are described herein. The antenna structure includes a building construction block structure that provides a non-radiating portion of the antenna structure. A radiating element is formed on one side of the building construction block provides a radiating portion of the antenna structure. The radiating element may include a coating of a metallic element, such as copper. Further, the antenna structure includes a ground plane that is spaced apart from the radiating element on the building construction block structure. The ground plane may partially include a portion of the radiating element configured to adhere to the building construction block structure of the antenna structure. The antenna structure may passively transmit and/or receive signals and provisions flexibility of deployment in different configurations based on the applications.

Abstract: An antenna for a ground-penetration radar system is disclosed. The antenna has a housing that defines a cavity. A radiator is located on a surface of a planar substrate within the cavity. A wear-block is located between the radiator and the opening to the cavity for providing mechanical protection to the radiator. An absorber assembly is located on an opposite side of the radiator from the opening. The absorber assembly comprises a microwave absorber and a first dielectric layer. The first dielectric layer is located between the radiator and the microwave absorber.