Methods, systems, and devices are described that include one or more septum features to improve performance of a waveguide device. In particular, the septum features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The septum feature(s) may be a ridge. When a plurality of septum features are employed, the location, size, shape and spacing may vary according to a particular design.

The present disclosure generally relates to any device capable of wireless communication, such as a mobile telephone or wearable device, having one or more antennas. By applying a variable reactance (capacitive or inductive component) antenna aperture tuner within a simple, scalar antenna aperture tuning system, the maintenance of a constant antenna resonant frequency in the presence of environmental changes or head/hand effects is obtained. The variable reactance is used to adjust the resonant frequency of the antenna to stay at the desired target frequency in response to external variables that would otherwise shift the resonance away from the operating frequency of the device. Adjusting the resonant frequency of the antenna in response to externally induced changes maintains the radiating efficiency of the antenna and simultaneously avoids impedance mismatch between the antenna and the respective transmit/receive path in the radio, thereby minimizing transmission losses.

An antenna system includes technological improvements for achieving improved surface accuracy of an antenna reflector during manufacturing and assembly, as well as maintaining the surface accuracy in response to wear and tear on the reflector. The antenna system includes a reflector, a plurality of mounting tabs, and a backing structure. The reflector has a front reflecting curved surface, an outer rim, and a back surface. The plurality of mounting tabs are positioned and secured around the outer rim of the reflector. Each of the plurality of mounting tabs is independently flexible with respect to the outer rim. The backing structure has a central mount, a plurality of attachment arms, and a feed arm attachment. The plurality of attachment arms are secured to the outer rim of the reflector via the plurality of mounting tabs.

A subreflector of a dual-reflector antenna comprises a first extremity comprising a convex inner surface, a second extremity adapted for coupling to the extremity of a waveguide, and a body extending between the first extremity and the second extremity. The body comprises a first dielectric part having a portion penetrating into the waveguide and a portion outside the waveguide, and a second metallic part comprising a first cylindrical portion, contiguous with the first extremity of the subreflector, whose diameter is greater than the portion outside the waveguide of the first dielectric part, and a second cylindrical portion, adjacent to the first cylindrical portion, extended by a conical portion that penetrates into the first dielectric part. The first cylindrical portion features a flat ring-shaped surface that forms an angle less than 90 with the axis of the subreflector so as to face the primary reflector.

This antenna device comprises an antenna element disposed in a recess 2 on the exterior of a moving body, and a non-feeding element of which the center is disposed at a position higher than the horizontal plane in which the center of the antenna element is positioned in the recess. In the antenna device, furthermore, the moving body is a vehicle, and the recess may be provided in a roof 1 of the vehicle.

This antenna device comprises an antenna element disposed in a recess 2 on the exterior of a moving body, and a non-feeding element of which the center is disposed at a position higher than the horizontal plane in which the center of the antenna element is positioned in the recess. In the antenna device, furthermore, the moving body is a vehicle, and the recess may be provided in a roof 1 of the vehicle.

In an antenna configuration in which two omnidirectional antenna elements that are arranged on a printed board, a device GND plane connected to a ground potential is formed on the printed board so as to cover an area other than a part where an electronic circuit is formed on the printed board, and parasitic antenna elements that are a first parasitic antenna element and a second parasitic antenna element are arranged at positions adjacent to the respective two omnidirectional antenna elements, in a state of being parallel to the omnidirectional antenna elements, and the parasitic antenna elements are arranged in a state of being close to the device GND plane, and entire lengths of the parasitic antenna elements are each set to be a length that is (?) of a wavelength of radio waves handled by the omnidirectional antenna element.

In an antenna configuration in which two omnidirectional antenna elements that are arranged on a printed board, a device GND plane connected to a ground potential is formed on the printed board so as to cover an area other than a part where an electronic circuit is formed on the printed board, and parasitic antenna elements that are a first parasitic antenna element and a second parasitic antenna element are arranged at positions adjacent to the respective two omnidirectional antenna elements, in a state of being parallel to the omnidirectional antenna elements, and the parasitic antenna elements are arranged in a state of being close to the device GND plane, and entire lengths of the parasitic antenna elements are each set to be a length that is (?) of a wavelength of radio waves handled by the omnidirectional antenna element.

An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.

An antenna array assembly comprises a ground plate, an array of radiator elements disposed in a spaced relationship with a first face of the ground plate between first and second substantially parallel conductive walls projecting from the first face of the ground plate, and a first and second conductive plate. Each of the first and second conductive plates is electrically isolated from the ground plate, and each is disposed in an upstanding relationship to the first face of the ground plate in a substantially parallel relationship with the first and second conductive walls. This provides reduced radiation in at least one direction in the hemisphere on the opposite side of the ground plate to the first face.