Abstract:
According to the present disclosure, an antenna apparatus which includes a hollow pillar shaped waveguide extending in a first direction and at least one ridge protruding from an inner circumferential surface of the waveguide and extending in the first direction, wherein the ridge has at least one recessed groove formed in the first direction; and an antenna apparatus which includes the waveguide, the ridge and the iris structure protruding from the inner circumferential surface of the waveguide along a plane intersecting the first direction, are provided.
Abstract:
Described is an in-band full-duplex (IBFD) antenna having direction finding capability. The IBFD antenna includes a transmit antenna having an omnidirectional radiation pattern and a receive antenna configured to provide a plurality of difference beams. The IBFD antenna may be disposed on a moving platform to cover all angles around the moving platform.
Abstract:
Embodiments of the present disclosure provide an antenna assembly for a test system. The antenna assembly includes a feedthrough part, two waveguide inputs, a single waveguide output as well as a multiplexing part that is interconnected between the two waveguide inputs and the single waveguide output. The multiplexing part is integrated within the feedthrough part at least partially. Moreover, embodiments of the present disclosure provide a test system and a method of establishing a test system for testing a device under test.
Abstract:
An antenna horn includes an upper waveguide ridge and a lower waveguide ridge shaped to provide impedance matching. The antenna horn operates unimodally within a 6:1 instantaneous bandwidth. A circular array of antenna horns produces an enhanced radiation pattern in a horizontal plane with reduced radiating in the direction orthogonal to the horizontal plane. Furthermore, two circular arrays of half-height antenna horns may be arranged on a collinear axis, offset by one half of a sector width as defined by each horn aperture to reduce coupling.
Abstract:
A tapered core waveguide which may be configured as a spectral component splitter, a spectral component combiner, and various combinations thereof including a reflective mode of operation. The tapered core waveguide has an aperture and cladding, and is dimensioned such that radiant energy admitted into the core via the aperture and having at least two spectral components would be emitted via the cladding at a location dependent on its frequency and/or its polarization, and that a plurality of spectral components injected to the core via the cladding will be mixed and emitted via the aperture.
Abstract:
A mode filter for an antenna having at least one element aperture is provided. The mode filter includes at least one waveguide extension to extend the at least one element aperture, and at least one two-by-two (2×2) array of quad-ridged waveguide sections connected to a respective at least one waveguide extension. When the at least one waveguide extension is positioned between the at least one element aperture and the at least one two-by-two (2×2) array of quad-ridged waveguide sections, undesired electromagnetic modes of the antenna are suppressed.
Abstract:
Provided is an antenna apparatus which employs a small number of antenna devices and is intended to obtain a desired pattern without adjusting amplitude level and phase of each antenna device. The antenna apparatus includes a first ridge horn antenna, and a second ridge horn antenna spaced apart from the first ridge horn antenna by a determined distance. Here, a multi-beam pattern is generated using a third-order mode beam pattern of a synthetic beam obtained by synthesizing beams respectively radiated from the first and second ridge horn antennas. Accordingly, the antenna apparatus can be simplified, and a desired multi-beam pattern can be obtained without adjusting signal level and phase of each antenna device. Also, by employing the ridge horn antennas as array devices, the antenna apparatus can be used in a wide frequency band.
Abstract:
Provided is an antenna apparatus which employs a small number of antenna devices and is intended to obtain a desired pattern without adjusting current level and phase of each antenna device. The antenna apparatus includes a first ridge horn antenna, and a second ridge horn antenna spaced apart from the first ridge horn antenna by a predetermined distance. Here, a multi-beam pattern is generated using a third-order mode beam pattern of a synthetic beam obtained by synthesizing beams respectively radiated from the first and second ridge horn antennas. Accordingly, the antenna apparatus can be simplified, and a desired multi-beam pattern can be obtained without adjusting signal level and phase of each antenna device. Also, by employing the ridge horn antennas as array devices, the antenna apparatus can be used in a wide frequency band.
Abstract:
A dual polarization multi-band antenna may include a waveguide horn, a low band feed section, a transition section, and a high band feed section coupled in series. The waveguide horn may be configured to support propagation of electromagnetic waves in a low band and a high band. The low band feed section may include horizontal and vertical feeds and may be configured to support propagation of electromagnetic waves in the low band and the high band. The high band feed section may include horizontal and vertical feeds and may be configured to support propagation of electromagnetic waves in the high band but not in the low band. The transition section may be configured to couple electromagnetic waves in the high band from the high band feed section to the low band feed section and to constructively reflect electromagnetic waves in the low band.
Abstract:
The present invention provides apparatus and methods for a ridge horn antenna that exhibits improved directivity and main lobe of the radiation pattern at the high end of the frequency range for which its gain remains usably high, while providing a relatively low VSWR across the frequency range of operation.