Abstract: An antenna may have features to ameliorate ice accumulation thereon. For instance, the antenna may include a feed structure between a reflector and a radome. The radome may cover at least a portion of the antenna and/or components of the antenna. A heating element may be located at various locations on the feed structure of the antenna. The heating element may heat the radome or other aspects of the antenna. The heating element may heat the radome or other aspects by infrared radiation, and/or via circulating warmed air. A fan may be provided to promote circulation of warmed air. The heat ameliorates ice accumulation the antenna so that ice accumulation does not diminish the electromagnetic performance of the antenna.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: One example includes a method for assembling a reflector antenna. The method includes coupling first and second frame members to respective sidewalls of a panel bonding tool via fastening features to engage a through-hole pattern of each of the respective frame members and bend the frame members to form a perimeter frame. A longitudinal surface of each of the frame members corresponding to a reflector profile of the reflector antenna extends beyond a longitudinal surface of the respective sidewalls along a length of the respective sidewalls. The method also includes applying an adhesive to each of the frame members of the perimeter frame, and adhering a reflector skin to the perimeter frame to form a radial antenna panel. The radial antenna panel has the reflector profile. The method further includes decoupling the radial antenna panel from the panel bonding tool upon curing of the adhesive.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

Abstract: A chair for transporting a patient includes a base frame, a plurality of casters mounted to the base frame, a patient support, and a push bar mounted to a back section of the patient support for use when transporting the patient. A wheel is coupled to the base frame for movement between a downward brake-steer position, facilitating steering the chair during transport of the patient, and an upward neutral position. The patient support includes articulated leg and seat sections. A handle is coupled to the patient support and is movable between a position in which movement of the handle moves the leg section relative to the seat section and a position in which movement of the handle does not move the leg section relative to the seat section.

Abstract: A chair for transporting a patient includes a base frame, a plurality of casters mounted to the base frame, a seat, and a push bar mounted to a back section of the seat for use when transporting the patient. A wheel is coupled to the base frame for movement between a downward brake-steer position, facilitating steering the chair during transport of the patient, and an upward neutral position. A brake mechanism brakes the casters when the brake mechanism is in a braking position and permits rotation of the casters when the brake mechanism is in a releasing position. A brake-steer shaft is coupled to the brake mechanism. Movement of the shaft moves the brake mechanism between the braking position and the releasing position. The brake-steer shaft is pivotably coupled to the base frame. The brake-steer shaft is coupled to the wheel so that rotation of the brake-steer shaft moves the wheel between the brake-steer position and the neutral position.

Abstract: A chair for transporting a patient includes a base frame, a plurality of casters mounted to the base frame, a patient support, and a push bar mounted to a back section of the patient support for use when transporting the patient. A wheel is coupled to the base frame for movement between a downward brake-steer position, facilitating steering the chair during transport of the patient, and an upward neutral position. The patient support includes articulated leg and seat sections. A handle is coupled to the patient support and is movable between a position in which movement of the handle moves the leg section relative to the seat section and a position in which movement of the handle does not move the leg section relative to the seat section.

Abstract: A chair for transporting a patient includes a base frame, a plurality of casters mounted to the base frame, a seat, and a push bar mounted to a back section of the seat for use when transporting the patient. A wheel is coupled to the base frame for movement between a downward brake-steer position, facilitating steering the chair during transport of the patient, and an upward neutral position. A brake mechanism brakes the casters when the brake mechanism is in a braking position and permits rotation of the casters when the brake mechanism is in a releasing position. A brake-steer shaft is coupled to the brake mechanism. Movement of the shaft moves the brake mechanism between the braking position and the releasing position. The brake-steer shaft is pivotably coupled to the base frame. The brake-steer shaft is coupled to the wheel so that rotation of the brake-steer shaft moves the wheel between the brake-steer position and the neutral position.

Abstract: A chair for transporting a patient includes a base frame, a plurality of casters mounted to the base frame, a seat, and a push bar mounted to a back section of the seat for use when transporting the patient. A wheel is coupled to the base frame for movement between a downward brake-steer position, facilitating steering the chair during transport of the patient, and an upward neutral position. A brake mechanism brakes the casters when the brake mechanism is in a braking position and permits rotation of the casters when the brake mechanismn is in a releasing position. A brake-steer shaft is coupled to the brake mechanism. Movement of the shaft moves the brake mechanism between the braking position and the releasing position. The brake-steer shaft is pivotably coupled to the base frame. The brake-steer shaft is coupled to the wheel so that rotation of the brake-steer shaft moves the wheel between the brake-steer position and the neutral position.

Abstract: A chair for supporting a patient above a floor comprising a base frame, an intermediate frame coupled to the base frame for pivoting movement relative to the base frame about a generally horizontal transverse axis thereon and wherein the intermediate frame is lockable relative to the base frame. An articulated patient support including longitudinally spaced back and seat sections mounted to the intermediate frame for movement relative to one another and relative to the intermediate frame and wherein the back and seat sections are movable relative to the base frame about the horizontal transverse axis when the intermediate frame is locked relative to the base frame.