Abstract: A vehicle arm adapter that includes a base member, a platform assembly coupled to the base member, and an adjustable frame retaining assembly coupled with the platform assembly. The base member can selectively couple with a lifting arm of a vehicle lift. The platform assembly includes a vehicle engagement surface. The platform assembly can engage and lift a vehicle in coordination with the vehicle lift. The adjustable frame retaining assembly includes a first retractable assembly and a second retractable assembly that are both capable of actuating between an extend configuration and a retracted configuration. The first and second frame retaining assemblies can cooperate to contain a first subset of vehicle frames in the extended configuration. The first and second frame retaining assemblies are prevented from retaining a second subset of vehicle frames in the retracted configuration.

Abstract: A linear multiband waveguide feed network device, which includes a first section, a second section, a third section and an inverse-ridge receive (Rx)-reject filter. The second section is coupled to the first section via a first split-plane. The third section is coupled to the second section via a second split-plane. The inverse-ridge Rx-reject filter is implemented as a first half-portion and a second half-portion. The first half-portion and the second half-portion are implemented in the second section and the third section, respectively. The first split-plane and the second split-plane are on a zero-current region of the device.

Abstract: A cargo-carrying sweatshirt includes a front panel, a rear panel, a left panel connecting the front panel and the rear panel wherein the left panel has a left sleeve, and a right panel connecting the front panel and the rear panel wherein the right panel has a right sleeve. A head opening is provided at a top portion of the sweatshirt and defined by the front panel and the rear panel. A body opening is provided at a bottom portion of the sweatshirt and is defined by the front panel, the rear panel, the left panel, and the right panel. The sweatshirt includes a plurality of cargo carrying accessories on the front panel, the rear panel, and the sleeves.

Abstract: The mode-whisperer waveguide device includes a main waveguide, a junction waveguide and a pair of recombination arm waveguides. The main waveguide features a spline taper extending along an axis of the main waveguide. The spline taper has been integrated with the normal linear aperture taper. The junction waveguide is attached to the main waveguide. The recombination arm waveguides are attached to the junction waveguide. A first port is coupled to the pair of recombination arm waveguides via a pair of recombination arm transformer steps. The main waveguide, the junction waveguide, the pair of recombination arm waveguides and the pair of recombination arm transformer steps are manufacturable as a monolithic waveguide device that is configured to achieve outstanding higher-order mode suppression due to the gradual dual spline taper which has been integrated with the normal linear taper to the aperture port.

Abstract: A reflector antenna includes a reflector, a feed, and a beamforming network. The feed is spaced apart at a focal distance from the reflector. The feed includes an array of dual linear polarized elements. The beamforming network is operatively coupled to the feed. The beamforming network is configured to generate a Sigma pattern and a Delta pattern in a plane orthogonal to the reflector plane of symmetry.

Abstract: A TE20 launch guidance waveguide hybrid coupler includes a waveguide body, a cavity, a plurality of ports, and a bend along the H-plane. The waveguide body includes a hybrid center portion which is disposed between and is in direct communication with the plurality of ports. The bend along the H-Plane is defined within the hybrid center portion, assists in the launching of the TE20 mode, and results in typically half the axial ratio and mass when compared to traditional hybrid approaches.

Abstract: A polarization waveguide network includes a reactive transmit (TX) power splitter and multiple receive (RX)-reject waveguide filters to reject RX frequencies. The polarization waveguide network further includes a quadrature junction coupler that can couple the RX-reject waveguide filters to an antenna port. The polarization waveguide network is configured to be fabricated in three pieces with two zero-current split planes, and a first piece of the three pieces is used for coupling to the antenna port.

Abstract: An antenna array includes multiple array modules. Each array module includes at least on antenna element including a horn antenna coupled to a polarizer, and a two-piece waveguide filter. The two-piece waveguide filter includes a folded-back waveguide coupled to the horn antenna at one end and to a circuit layer at the other end. The horn antenna includes a multi-mode horn antenna. The two-piece waveguide filter includes a first piece and a second piece that are separately molded. A footprint of the two-piece waveguide filter is within a footprint of an aperture of the horn antenna.

Abstract: A linear multiband waveguide feed network device, which includes a first section, a second section, a third section and an inverse-ridge receive (Rx)-reject filter. The second section is coupled to the first section via a first split-plane. The third section is coupled to the second section via a second split-plane. The inverse-ridge Rx-reject filter is implemented as a first half-portion and a second half-portion. The first half-portion and the second half-portion are implemented in the second section and the third section, respectively. The first split-plane and the second split-plane are on a zero-current region of the device.

Abstract: An agrochemical concentrate comprises lecithin and at least one agrochemical active. The agrochemical concentrate may also comprise a dispersant selected from sucrose ester, alkylpolyglucoside, alkylnaphthalene sulphonates, phosphate ester, sorbitol ester, polyglycerol ester, alkyl sulphates, sodium lauryl sulphate, alkylglucamides, and dialkyl sulphosuccinates. An aqueous formulation comprises a dilution of the agrochemical concentrate in an electrolyte. A pre-blend comprises lecithin and a dispersant. A method of preparing the agrochemical concentrate and a method for treating vegetation are also disclosed.

Abstract: Alloys of GeSbSeTe (GSST) can be used to make actively tunable infrared transmission filters that are small, fast, and solid-state. These filters can be used for hyperspectral imaging, 3D LIDAR, portable bio/chem sensing systems, thermal emission control, and tunable filters. GSST is a low-loss phase-change material that can switch from a low-index (n=3), amorphous state to a high-index (n=4.5), hexagonal state with low loss (k<0.3) over a wavelength range of 2-10 microns or more. The GSST thickness can be selected to provide pure phase modulation, pure amplitude modulation, or coupled phase and amplitude modulation. GSST can be switched thermally in an oven, optically with visible light, or electrically via Joule heating at speeds from kilohertz to Gigahertz. It operates with reversible and polarization independent transmission switching over a wide incident angle (e.g., 0-60 degrees).

Abstract: A transmitter of a feed network includes first and second branches and an integrated branch line coupler that couples the first and second branches. The integrated branch line coupler includes first and second waveguide reject filters in the first and second branches respectively. The first and second waveguide reject filters include one or more single-sided stubs protruding outwardly from outer faces of the first and second waveguide reject filters. The integrated branch line coupler further includes one or more couplers that are coupled between inner faces of the first and second waveguide reject filters. The transmitter includes a core waveguide that is coupled to the first and second branches. The transmitter receives a linearly polarized signal from an input port of the first or second branches and generates a circularly polarized signal in the core waveguide.

Abstract: An antenna array includes multiple array modules. Each array module includes at least on antenna element including a horn antenna coupled to a polarizer, and a two-piece waveguide filter. The two-piece waveguide filter includes a folded-back waveguide coupled to the horn antenna at one end and to a circuit layer at the other end. The horn antenna includes a multi-mode horn antenna. The two-piece waveguide filter includes a first piece and a second piece that are separately molded. A footprint of the two-piece waveguide filter is within a footprint of an aperture of the horn antenna.

Abstract: A transmitter of a feed network includes first and second branches and an integrated branch line coupler that couples the first and second branches. The integrated branch line coupler includes first and second waveguide reject filters in the first and second branches respectively. The first and second waveguide reject filters include one or more single-sided stubs protruding outwardly from outer faces of the first and second waveguide reject filters. The integrated branch line coupler further includes one or more couplers that are coupled between inner faces of the first and second waveguide reject filters. The transmitter includes a core waveguide that is coupled to the first and second branches. The transmitter receives a linearly polarized signal from an input port of the first or second branches and generates a circularly polarized signal in the core waveguide.

Abstract: Challenges of direct-to-Earth (DTE) laser communications (lasercom) between spacecraft in low-Earth orbit (LEO) or medium-Earth orbit (MEO) and ground terminals can include short duration transmission windows, long time gaps between the transmission windows, deleterious effects of atmospheric turbulence, and the inability to operate in cloudy weather. Direct-link optical communications systems described herein can have data rates that are high enough to empty high-capacity on-board buffer(s) (e.g., having a capacity of at least about 1 Tb to hundreds of Tb) of a spacecraft in a single pass lasting only tens of seconds to a few minutes (e.g., 1-15 minutes), and overprovisioning the buffer capacity accounts for variations in the latency between links. One or more distributed networks of compact optical ground terminals, connected via terrestrial data networks, receive and demodulate WDM optical data transmissions from a plurality of orbiting spacecraft (e.g., satellites).

Abstract: The embodiments of the disclosed invention relate to fiber optic weapon sights that use a reflector to direct ambient light to a fiber optic rod and thus provide weapon sights that are bright in any lighting condition. In one instance, the reflector can have a concave shape, such as a spherical or parabolic shape, that can focus ambient light on the fiber optic rod and thereby significantly increase the brightness of the weapon sight. The embodiments of the present invention can accordingly provide enhanced fiber optic front and/or rear sights for weapons including rifles, pistols, and shotguns.

Abstract: A method and apparatus forming an efficient and compact waveguide feed with all components for processing signals in multi-frequency band antenna feeds with single/dual linear/circular polarizations with/without tracking. This layout results in a very compact feed, which has excellent electrical characteristics, is mechanically robust, eliminates flange connections between components, and is very cost effective. The new layout eliminates the dummy ports and bends at least one filter element is bent to an acute angle, thereby enabling a high density packaging of the microwave feed network; and wherein a plurality of single sided corrugations are located along the bent filter element. In this design high density arrays of feeds can be realized for satellite communication.

Abstract: Certain embodiments of the present disclosure describe a clip for biasing and maintaining rollers within an opening of the roller bearing assembly. The clip includes a connecting segment, a resilient portion, and an anchor portion. The clip may be attached to a roll cage with openings for rollers. The resilient portion of the clip extends into an opening and contacts the roller when a roller is received in the opening. The anchor portion is positioned in an adjacent opening and abuts the roll cage.

Abstract: The embodiments of the disclosed invention relate to fiber optic weapon sights that use a reflector to direct ambient light to a fiber optic rod and thus provide weapon sights that are bright in any lighting condition. In one instance, the reflector can have a concave shape, such as a spherical or parabolic shape, that can focus ambient light on the fiber optic rod and thereby significantly increase the brightness of the weapon sight. The embodiments of the present invention can accordingly provide enhanced fiber optic front and/or rear sights for weapons including rifles, pistols, and shotguns.

Abstract: Certain embodiments of the present disclosure describe a clip for biasing and maintaining rollers within an opening of the roller bearing assembly. The clip includes a connecting segment, a resilient portion, and an anchor portion. The clip may be attached to a roll cage with openings for rollers. The resilient portion of the clip extends into an opening and contacts the roller when a roller is received in the opening. The anchor portion is positioned in an adjacent opening and abuts the roll cage.