A horn antenna includes a waveguide portion and an antenna portion operably connected with the waveguide portion. The waveguide portion has a feed port. The antenna portion is arranged to receive a linearly polarized signal from the waveguide portion and to convert the received linearly polarized signal to a circularly polarized signal for transmission.

A waveguide structure for a compact and scalable dual-polarized antenna array. In one example, a waveguide device comprises septum polarizers dividing common waveguides into first waveguides associated with a first polarization and second waveguides associated with a second polarization. The sets of septum polarizers may be inverted relative to each other to form first groups of four adjacent first waveguides for each type of waveguide. The waveguide device may also include a waveguide feed network including a first waveguide feed stage including waveguide combiner/dividers coupled between the four adjacent waveguides intermediate waveguides. The waveguide device may further include a second waveguide feed stage coupled with the first intermediate waveguides and the second intermediate waveguides, wherein the second waveguide feed stage extends in a direction perpendicular to the first waveguide feed stage.

Methods, systems, and devices for a dual-polarized antenna array are described. An example antenna array may include a parallel plate polarizer that may include upper and lower plates. The antenna array may include stepped septums extending between the plates, each of the stepped septums having a first and second side surfaces, the stepped septums comprising first and second sets that are inverted relative to each other. The antenna array may include a first divided waveguides associated with a first polarization that may have a first set of opposing walls formed by first portions of the upper and lower plates and a second set of opposing walls. The antenna array may include second divided waveguides associated with a second polarization that may have a first set of opposing walls formed by second portions of the upper and lower plates and a second set of opposing walls.

A waveguide structure for a compact and scalable dual-polarized antenna array. In one example, a waveguide device comprises septum polarizers dividing common waveguides into first waveguides associated with a first polarization and second waveguides associated with a second polarization. The sets of septum polarizers may be inverted relative to each other to form first groups of four adjacent first waveguides for each type of waveguide. The waveguide device may also include a waveguide feed network including a first waveguide feed stage including waveguide combiner/dividers coupled between the four adjacent waveguides intermediate waveguides. The waveguide device may further include a second waveguide feed stage coupled with the first intermediate waveguides and the second intermediate waveguides, wherein the second waveguide feed stage extends in a direction perpendicular to the first waveguide feed stage.

An antenna includes a reflector and a waveguide assembly. The waveguide assembly includes a feed assembly and a support member that extends from behind the reflector to orient the feed assembly for direct illumination of the reflector. The waveguide assembly includes a first waveguide coupled to a first portion of a common waveguide, a second waveguide coupled to a second portion of the common waveguide, and a septum layer that includes a septum polarizer coupled between the common waveguide and the first and second waveguides.

A phase-controlled antenna element includes a waveguide emitter with signal output or signal injection, into which a rotatable phase control element is introduced, and a drive unit. The phase control element comprises in this case a holder, at least two polarizers which are fastened to the holder, and a connecting element. Each of the at least two polarizers can convert a circularly polarized signal into a linearly polarized signal. The phase control element is rotatably fitted in the waveguide emitter and is connected to the drive unit with the aid of the connecting element in such a manner that the drive unit can rotate the phase control element about the axis of the waveguide emitter.

Disclosed is a shaped horn in conjunction with a dielectric tube for enhanced aperture directivity that can achieve a near optimum efficiency. The shaped horn provides additional mode control to provide an improved off-axis cross-polarization response. The horn shape can be individually optimized for isolated horns or for horns in a feed array. The feed array environment can produce results that lead to a different optimized shape than the isolated horn. Lower off axis cross-polarization can result in improved efficiency and susceptibility to interference.

A phase-controlled antenna array comprises at least four phase-controlled elements which are connected via a feed network. Each antenna element comprises a waveguide emitter with a signal output coupling or input coupling and a phase actuator which is rotatably attached in the waveguide emitter and contains a mounting and two polarizers, wherein each of the two polarizers can convert a circularly polarized signal into a linearly polarized signal. The antenna elements additionally comprise a connection element and a drive unit which is attached to a support and which is connected to the phase actuator via the connection element such that the drive unit can rotate the phrase actuator about an axis of the waveguide emitter. The antenna array additionally comprises a computing unit which is connected to the drive unit(s) of the phase-controlled antenna elements via control lines and which adjusts the rotation of each phase actuator.

An antenna includes a reflector and a waveguide assembly. The waveguide assembly includes a feed assembly and a support member that extends from behind the reflector to orient the feed assembly for direct illumination of the reflector. The waveguide assembly includes a first waveguide coupled to a first portion of a common waveguide, a second waveguide coupled to a second portion of the common waveguide, and a septum layer that includes a septum polarizer coupled between the common waveguide and the first and second waveguides.

An integrated device comprises a horn antenna with an antenna waveguide feed, a waveguide transition element comprising a first end connected to the antenna waveguide feed and second end, and an orthomode transducer comprising a common waveguide connected to the second end of the waveguide transition element and at least two separate waveguides. The orthomode transducer is adapted to couple at least two orthogonal linear polarized fields into the common waveguide of the orthomode transducer with the aid of the at least two separate waveguides of the orthomode transducer and/or vice versa. The horn antenna is preferably adapted to support at least two waveguide modes corresponding to the at least two orthogonal linear polarized fields. The integrated device is preferably manufactured in at least two separate blocks such that each part of the at least two piece assembly is constructed as external protrusions and/or holes and/or partial holes.