An antenna apparatus is formed on a plane defined by perpendicular first and second axes. The antenna apparatus includes a primary radiating part, and two secondary radiating parts each including a section that extends along the first axis. The primary radiating part includes a first radiator having reflection symmetry about the second axis, a second radiator symmetrical to the first radiator with respect to the first axis, and two feed-in points The first radiator includes two lateral segments and a connector segment interconnecting the two lateral segments The lateral segments taper toward the first axis. A distance between the feed-in points is smaller than a length of a long edge of the connector segment.

An antenna apparatus is formed on a plane defined by perpendicular first and second axes. The antenna apparatus includes a primary radiating part, and two secondary radiating parts each including a section that extends along the first axis. The primary radiating part includes a first radiator having reflection symmetry about the second axis, a second radiator symmetrical to the first radiator with respect to the first axis, and two feed-in points The first radiator includes two lateral segments and a connector segment interconnecting the two lateral segments The lateral segments taper toward the first axis. A distance between the feed-in points is smaller than a length of a long edge of the connector segment.

An antenna device vertically rotatable and horizontally rotatable is provided, which has a configuration in which waveguides are effectively disposed. An antenna device includes an antenna, a vertically rotating, and a rotary joint. The antenna is vertically rotatable and horizontally rotatable, and outwardly radiates a radio wave. The vertically rotating is disposed such that a longitudinal direction thereof is along an axial line of the vertical rotation and intersects perpendicularly with an axial line of the horizontal rotation. The rotary joint is coupled to the vertically rotating. Moreover, the antenna device includes a waveguide path passing through the inside of the rotary and the inside of the vertically rotating and connected with the antenna.

A device and method are described for duplex satellite communication over a single satellite antenna. A satellite ground terminal may utilize a frequency-selective surface module including a frequency-selective surface as a subreflector acting as a frequency diplexer to separate signals received and/or transmitted by a first feed and a second feed of a satellite ground terminal, where each feed has a separate antenna horn. The frequency-selective surface module may be used in combination with a second subreflector such that a first feed and a second feed of the satellite ground terminal are implemented on the same side of the frequency-selective surface module.

A device and method are described for duplex satellite communication over a single satellite antenna. A satellite ground terminal may utilize a frequency-selective surface module including a frequency-selective surface as a subreflector acting as a frequency diplexer to separate signals received and/or transmitted by a first feed and a second feed of a satellite ground terminal, where each feed has a separate antenna horn. The frequency-selective surface module may be used in combination with a second subreflector such that a first feed and a second feed of the satellite ground terminal are implemented on the same side of the frequency-selective surface module.

An over-the-air (OTA) measurement system for testing a device under test, with a plurality of feed antennas, a test location for the device under test, and a reflector array with a main reflector and a sub-reflector. The plurality of feed antennas face the sub-reflector. The reflector array is located such that a signal path is established between the plurality of feed antennas and the test location via the sub-reflector and the main reflector. The sub-reflector has at least one focal point. The plurality of feed antennas include a first feed antenna and at least one second feed antenna. The first feed antenna is associated with the focal point of the sub-reflector. The at least one second feed antenna is located offset from the focal point of the sub-reflector. Further, a method of testing a device under test over-the-air is described.

A hosted multi-reflector antenna system includes a primary reflector, a subreflector, an aperture, a feed structure and an anti-jam housing. The feed structure includes an electronically steered antenna (ESA). The subreflector directs a reflected beam between a primary reflector and an ESA, and the anti-jam housing encloses the subreflector and the ESA. The antenna system is thermo-elastically decoupled and thermally self-sufficient, accommodates thermal dissipation of the feed structure, and can maintain a precise antenna alignment.

Described are several embodiments of parabolic reflective antenna systems where a flexible primary reflector is supported by radial ribs of shape memory material deployed by application of heat. Several feeds made with shape memory materials working with the reflector are presented. Feed preforms include corrugated, telescopic and flattened ribbon types which extend or unfurl into final shapes upon application of heat. Several antenna and feed embodiments also contain supports for secondary reflectors and patch antennas.

Antenna assemblies are described herein. In particular, described herein are multi-focal-point antenna devices and compact radio frequency (RF) antenna devices. Any of these assemblies may include a primary feed that includes a single patterned emitting surface from which multiple different beams of RF signals are emitted corresponding to different antenna input feeds each communicating with the patterned antenna emitting surface. The antenna assembly is therefore capable of emitting beams in the same direction having different polarizations using a single primary feed.

Antenna assemblies are described herein. In particular, described herein are multi-focal-point antenna devices and compact radio frequency (RF) antenna devices. Any of these assemblies may include a primary feed that includes a single patterned emitting surface from which multiple different beams of RF signals are emitted corresponding to different antenna input feeds each communicating with the patterned antenna emitting surface. The antenna assembly is therefore capable of emitting beams in the same direction having different polarizations using a single primary feed.