A system and method for selecting a polarization for a particular antenna in an antenna array is disclosed. The system comprises an antenna array, wherein each antenna is adapted to receive and transmit horizontally and vertically polarized signals. The system also includes a switching network that is adapted to select the vertical or horizontal polarized signal for each antenna in the antenna array. The switching network also allows selection of a circular polarized signal from one or more of the antenna elements in the antenna array. This allows the AoX to be more accurate, as it is able to receive horizontally and vertically polarized signals, rather than just circular polarized signals, thereby improving its accuracy. The ability to receive circular polarized signals may be beneficial during reference periods to acquire the proper gain and frequency.

Systems and methods relating to patch antennas. A patch antenna has a substrate, a resonant metal plate at one side of the substrate, and a ground plane at the other opposite side of the substrate. Two feed pins are used to couple the antenna to other circuitry. The feed pins pass through the substrate and holes in at the ground plane. The feed pins are physically disconnected from both the resonant metal plate and the ground plane. The feed pins are capacitively coupled to the resonant metal plate to provide an electronic connection between other circuitry and the patch antenna.

An adjustable polarization converter and an electronic device are provided. The adjustable polarization converter includes a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The first substrate includes a first base substrate and a first electrode on the first base substrate; the second substrate includes a second base substrate and a second electrode on the second base substrate. The first electrode includes a conductive frame and two triangular conductive patches. The conductive frame includes two openings disposed in sequence, and the two triangular conductive patches are disposed in a region surrounded by the conductive frame and are centrally symmetric.

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.

An antenna feed for a stackable antenna system includes a polarization converter that continuously surrounds an omnidirectional antenna. Electromagnetic radiation emitted by the omnidirectional antenna and having an initial polarization passes through the first polarization converter, which converts the initial polarization into a non-vertical linear polarization. A feedline located outside of the first polarization converter forms a helix that wraps around the first polarization converter such that it runs perpendicularly to the non-vertical linear polarization. When the width of the feedline is sufficiently small, electrons in metal of the feedline will not be excited by the radiation, and the radiation will transmit through the feedline with minimal impact on the omnidirectional antenna's gain profile. The feedline may be used to feed a second antenna located vertically above the omnidirectional antenna. When the first polarization converter outputs horizontally polarized radiation, the feedline may form a straight vertical line.

A dual-mode polarizer for selectively switching between linear polarization and circular polarization includes a first meander-line polarizer, and a second meander-line polarizer spaced apart from the first meander-line polarizer to define a first gap therebetween. A first angular orientation between the first and second meander-line polarizers produces variably-oriented linear polarization of a signal passing through the first and second meander-line polarizers, and a second angular orientation between the first and second meander-line polarizers produces variably-oriented circular polarization of a signal passing through the first and second meander-line polarizers.

In an aspect, a polarization converter comprises a plurality of alternating high Dk layers and low Dk layers that alternate along an x-direction; wherein neighboring broad surfaces of the respective high Dk layers and low Dk layers are bonded together. In another aspect, a polarization converter can comprise a plurality of alternating high Dk layers and low Dk layers that alternate along a radial direction; wherein neighboring broad surfaces of the respective high Dk layers and low Dk layers are bonded together. The polarization converter is capable of converting an incoming electromagnetic wave to an outgoing electromagnetic wave having a different polarization.

An integral waveguide device herein includes a polarizer component comprising a waveguide and a dielectric slab, the dielectric slab configured to change a polarization of a signal passing through the waveguide. The integral waveguide device also includes a feed horn for conveying signals between the waveguide and a parabolic antenna. The waveguide of the polarizer and the feed horn are manufactured as an integral component with the feed horn disposed at a first end of the waveguide.

Embodiments of this application relate to a method for controlling an antenna polarization direction and an antenna system. A first feed array and a second feed array whose polarization directions are orthogonal are disposed in the antenna system. A polarization direction of a beam of a third planar array may be adjusted by adjusting parameters such as beam widths/a beam width of the first feed array and/or the second feed array, phase centers/a phase center of the first feed array and/or the second feed array, and a phase difference between the first feed array and the second feed array.

A radio frequency (RF) polarizer includes a frame having a first side and a second side spaced apart from and opposite the first side, a first polarizer substrate attached to the first side and including a plurality of conductor patterns formed on a surface of the first polarizer substrate, and a second polarizer substrate attached to the second side. The first polarizer substrate and the second polarizer substrate are attached to the first side and the second side, respectively, under tension.