摘要:
A phased array antenna is formed from an array of apertures having walls containing phase shifter devices for phase shifting and beam steering a radiated beam of the phased array antenna. The phase shifter devices are interconnected with an interconnect structure formed from substrate slats that form the walls of the apertures. The substrate slats may be thin film circuitized column slats having a metal substrate, dielectric layers, metal bias/control circuitry, a shielding layer, and circuit terminations to connect to a phase shifter device attached to the substrate slat.
摘要:
A phased array antenna with an egg crate array structure is formed from metallic row slats that form a floor and ceiling of each array element. Column slats with slots engage the row slots to form the egg crate array structure. EMXT devices are located on the column slats such that a pair of EMXT devices form array element walls. The column slats are formed from U-shaped column strips configured such that a left side of the U-shape forms a left-hand side of each array element in a column and a right side of the U forms an opposing right-hand side. The column strips sides are mounted back-to-back with sides of adjacent column strips to form the column slats. Circuit devices for operation of the antenna are mounted on the U-shaped column strip and a connector is mounted at an apex of the U-shaped column slat.
摘要:
A phased array antenna is made up of linear arrays. Each of the linear arrays has a printed circuit board spine. Split waveguides are formed from two symmetrical portions conductively joined to ground on opposite sides of the printed circuit board spine. Planar transmission line-to-waveguide transitions are mounted on the printed circuit board spine within the split waveguides. Phase shifter/TTD devices are mounted on the circuit board spine within the split waveguides for steering the phased array antenna beam. Bias and control circuitry is etched on the circuit board spine for biasing and controlling the phase shifter/TTD devices. The phased array antenna may be made up of the linear arrays combined into a two-dimensional array and fed with a waveguide feed or a printed feed manifold attached to the printed wiring board spine.
摘要:
A phased array antenna is provided having a plurality of phase shifter devices for phase shifting and beam steering a radiated beam of the phased array antenna. The plurality of phase shifter devices are interconnected with an interconnect structure comprising a plurality of linear array substrate slats. Each linear array substrate slat includes a plurality of radiating elements formed using first and second metal layers of the substrate slat, a plurality of phase shifter devices and a common RF feed conductor for the plurality of radiating elements. The common RF feed conductor is formed on a third metal layer of the substrate slat that is disposed between the first and second metal layers. The common RF feed conductor is configured to include a single location for electrical connections to receive RF signals for the plurality of radiating elements. The phased array antenna also includes bias/control conductors applied to selected areas of the third metal layer, a fourth metal layer applied over the second metal layer and a shielding metal layer applied on the fourth metal layer. The bias/control conductors are configured to include a single location for electrical connections to receive bias voltages and control signals. The fourth metal layer includes circuit connections from the bias/control circuitry to the plurality of phase shifter devices. Each phase shifter device is attached to a radiating element via a mounting location on the shielding metal layer. Accordingly, a phased array antenna interconnect structure is provided that reduces the number of electrical connections required to provide RF signals and bias/control signals to multiple radiating elements and phase shifters, respectively, of the phased array antenna and provides a cost effective phased array antenna architecture that has a single locus of electrical connection for RF and bias control signals embedded in a multi-layer linear array or slat substrate of the phased array antenna.
摘要:
An aperture of an antenna for a radar system comprises a first waveguide comprising a first protrusion and a second protrusion, each protrusion extending longitudinally along one side of the first waveguide. The aperture further comprises a second waveguide comprising a third protrusion and a fourth protrusion, each protrusion extending longitudinally along one side of the second waveguide. The first and third protrusions and second and fourth protrusions adjoin to form a radio frequency choke at least partially suppressing cross polarization of radio frequencies between the first and second waveguides.
摘要:
The present disclosure is directed to a dual-polarized antenna array including a first BAVA, a second BAVA and a cradle assembly. The cradle assembly includes first, second and third U-channel modules connected via first and second frame portions. The first U-channel module, the second U-channel module, and the first frame portion receive first, second and third edge portions of a substrate of the first BAVA, respectively. The second U-channel module, the third U-channel module, and the second frame portion receive first, second and third edge portions of a substrate of the second BAVA, respectively. When received within the cradle assembly, the substrate of the first BAVA is oriented perpendicular to the substrate of the second BAVA. The first BAVA is a vertical polarization input and the second BAVA is a horizontal polarization input.
摘要:
An electronically scanned slotted waveguide antenna radiates an RF signal as a scannable beam. The antenna has radiation waveguides positioned in an array. Radiation slots in the radiation waveguides radiate the scannable beam. A feed waveguide is coupled to the radiation waveguides. The feed waveguide feeds the RF signal to the radiation waveguides through coupling slots. The feed waveguide has sidewalls with tunable electromagnetic crystal (EMXT) structures thereon. The EMXT structures vary the phase of the RF signal in the feed waveguide to scan the radiated beam in one dimension. The radiation waveguides may also have tunable EMXT structures on the sidewalls to vary the phase of the RF signal to scan the radiated beam in a second dimension. The EMXT structures may be discrete EMXT devices or a EMXT material layer covering the feed and radiation waveguide sidewalls.
摘要:
The present disclosure is directed to a dual-polarized antenna array including a first BAVA, a second BAVA and a cradle assembly. The cradle assembly includes first, second and third U-channel modules connected via first and second frame portions. The first U-channel module, the second U-channel module, and the first frame portion receive first, second and third edge portions of a substrate of the first BAVA, respectively. The second U-channel module, the third U-channel module, and the second frame portion receive first, second and third edge portions of a substrate of the second BAVA, respectively. When received within the cradle assembly, the substrate of the first BAVA is oriented perpendicular to the substrate of the second BAVA. The first BAVA is a vertical polarization input and the second BAVA is a horizontal polarization input.
摘要:
The present disclosure includes a method for producing a multi-band waveguide reflector antenna feed. The antenna feed includes a first tube and a second tube. The first and second tubes are connected to form a concentric multi-band waveguide feed array. The first tube includes a surface(s) which is/are at least partially covered by metamaterial(s), thereby forming a first waveguide feed. The second tube also includes a surface(s) which is/are at least partially covered by metamaterial(s). A radial separation is established between the first tube and the second tube, thereby forming a second waveguide feed. The radial separation may be maintained between the first tube and the second tube by one or more of: a loading material, support structures, strings, and wires. The loading material, support columns, strings, and/or wires also structurally interconnect the first tube and the second tube.
摘要:
An aperture of an antenna for a radar system comprises a first waveguide comprising a first protrusion and a second protrusion, each protrusion extending longitudinally along one side of the first waveguide. The aperture further comprises a second waveguide comprising a third protrusion and a fourth protrusion, each protrusion extending longitudinally along one side of the second waveguide. The first and third protrusions and second and fourth protrusions adjoin to form a radio frequency choke at least partially suppressing cross polarization of radio frequencies between the first and second waveguides.