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: An exercise apparatus with a first glove (22) configured to enclose a left hand of a user (40), a second glove (32) configured to enclose a right hand of the user, a connection cord (14) having a first end (21) and a second end (31) and comprising elastic material, a first attachment (20) connecting the first end of the connection cord with the first glove, and a second attachment (30) connecting the second end of the connection cord with the second glove (32).

Abstract: A rope climbing apparatus (15) comprising a frame (16), a seat (18) supported by the frame and adapted to move relative to the frame from a first position (19) to an elevated second position (20), a lower pulley assembly (21) connected to the seat, an upper pulley assembly (22) connected to the frame, a rope (23) extending between the lower pulley assembly and the upper pulley assembly and having a rope climbing portion (24) graspable by a user (25) when the user is seated on the seat, and the rope, the seat, the lower pulley assembly and the upper pulley assembly configured and arranged such that a downward force (26) on the rope climbing portion of the rope causes an upward force (28) on the seat. The downward force on the rope climbing portion may result in an upward force on the seat at a mechanical advantage provided by the lower pulley assembly and the upper pulley assembly, and the mechanical advantage may be four.

Abstract: A rope climbing apparatus (15) comprising a frame (16), a seat (18) supported by the frame and adapted to move relative to the frame from a first position (19) to an elevated second position (20), a lower pulley assembly (21) connected to the seat, an upper pulley assembly (22) connected to the frame, a rope (23) extending between the lower pulley assembly and the upper pulley assembly and having a rope climbing portion (24) graspable by a user (25) when the user is seated on the seat, and the rope, the seat, the lower pulley assembly and the upper pulley assembly configured and arranged such that a downward force (26) on the rope climbing portion of the rope causes an upward force (28) on the seat. The downward force on the rope climbing portion may result in an upward force on the seat at a mechanical advantage provided by the lower pulley assembly and the upper pulley assembly, and the mechanical advantage may be four.

Abstract: A fully automated raffle assembly (15) comprising a data collection device (16) adapted to read information, a printer (18) communicating with the data collection device and adapted to print a raffle ticket (19), the printer and the data collection device so configured and arranged that the information read by the data collection device is communicated to the printer and printed on the ticket, a collection bin (20), the printer and collection bin so configured and arranged that the ticket is automatically fed into the collection bin after it is printed by the printer. The data collection device may be selected from a group consisting of a bar code scanner and a magnetic code scanner. The raffle assembly may further comprise a ticket guide (21) between the printer and the collection bin, the ticket guide configured to direct the ticket from the printer into the collection bin.

Abstract: A fully automated raffle assembly (15) comprising a data collection device (16) adapted to read information, a printer (18) communicating with the data collection device and adapted to print a raffle ticket (19), the printer and the data collection device so configured and arranged that the information read by the data collection device is communicated to the printer and printed on the ticket, a collection bin (20), the printer and collection bin so configured and arranged that the ticket is automatically fed into the collection bin after it is printed by the printer. The data collection device may be selected from a group consisting of a bar code scanner and a magnetic code scanner. The raffle assembly may further comprise a ticket guide (21) between the printer and the collection bin, the ticket guide configured to direct the ticket from the printer into the collection bin.

Abstract: An antenna element (20) comprising a first conductive plane (22), a second conductive plane (24), and one or more dielectric layers (26, 28, 30) separating the first and second conductive planes (22 and 24). A resonant cavity (48) is formed by a portion of the first conductive plane (22), a portion of the second conductive plane (24) and electrical connections (e.g., plated vias(40)) extending therebetween. A slot (32) is formed in the portion of the second conductive plane (24) forming one side of the resonant cavity (48) and the feedline (34) extends into the cavity (48).

Abstract: A dual-polarization common aperture antenna having fully populated common aperture dual polarized arrays. The inventive antenna includes a first and second arrays of radiating slots disposed in a faceplate. The second array is generally orthogonal and therefor cross-polarized relative to the first array. The first array is waveguide fed and the second array is stripline fed. In the illustrative implementation, the first array and the second array share a common aperture. The common aperture is fully populated and each array uses the aperture in its entirety. The first and second arrays of slots are arranged for four-way symmetry. Each slot in the first array is a vertically oriented, iris-excited shunt slot fed by a rectangular waveguide and centered on a broad wall thereof. The second array is a standing wave array in which each slot is an air cavity backed slot fed by an inverted micro-stripline offset from a center thereof.

Abstract: A dual-polarization common aperture antenna having fully populated common aperture dual polarized arrays. The inventive antenna includes a first and second arrays of radiating slots disposed in a faceplate. The second array is generally orthogonal and therefor cross-polarized relative to the first array. The first array is waveguide fed and the second array is stripline fed. In the illustrative implementation, the first array and the second array share a common aperture. The common aperture is fully populated and each array uses the aperture in its entirety. The first and second arrays of slots are arranged for four-way symmetry. Each slot in the first array is a vertically oriented, iris-excited shunt slot fed by a rectangular waveguide and centered on a broad wall thereof. The second array is a standing wave array in which each slot is an air cavity backed slot fed by an inverted micro-stripline offset from a center thereof.

Abstract: An antenna element (20) comprising a first conductive plane (22), a second conductive plane (24), and one or more dielectric layers (26, 28, 30) separating the first and second conductive planes (22 and 24). A resonant cavity (48) is formed by a portion of the first conductive plane (22), a portion of the second conductive plane (24) and electrical connections (e.g., plated vias(40)) extending therebetween. A slot (32) is formed in the portion of the second conductive plane (24) forming one side of the resonant cavity (48) and the feedline (34) extends into the cavity (48).

Abstract: An aperture coupled microstrip patch antenna coupling circuit. Electromagnetic energy propagating along a stripline feedline is coupled through one of the ground plane surfaces through a tuned aperture to an adjacent microstrip feedline device, which may be a microstrip patch antenna. Undesirable propagation modes are suppressed by enclosing the aperture-coupled slot in a non-resonant cavity. Impedance matching is accomplished with an impedance matching section.

Abstract: An aperture coupled microstrip patch antenna coupling circuit. Electromagnetic energy propagating along a stripline feedline is coupled through one of the ground plane surfaces through a tuned aperture to an adjacent microstrip feedline device, which may be a microstrip patch antenna. Undesirable propagation modes are suppressed by enclosing the aperture-coupled slot in a non-resonant cavity. Impedance matching is accomplished with an impedance matching section.

Abstract: A compact high-performance antenna. The antenna includes a waveguide (16) for providing or receiving electromagnetic energy. A feed circuit (18, 106, 108, 110) provides or receives the electromagnetic energy to or from the waveguide (16). A radiating circuit (112, 114) provides or receives the electromagnetic energy to or from the feed circuit (18). One or more notches (120) in the feed circuit (108, 110) compensate for insertion phase errors in the electromagnetic energy. One or more tabs (18) in the radiating circuit (112, 114) compensate for radiation phase errors in the electromagnetic energy. In a specific embodiment, the antenna is a dipole antenna and includes an array of dipole cards. The radiating circuit (112, 114) includes first (112) and second (114) radiating circuits included in each of the dipole cards (14). The first (112) and second (114) radiating circuits include a plurality of quarter-wave stripline transformers (24).

Abstract: Disclosed is a common aperture dual polarization antenna array (30). This common aperture dual polarization antenna array (30) includes an antenna aperture (36) and a plurality of centered slot arrays (32) positioned within the antenna aperture (36). A plurality of notch dipole arrays (34) are positioned within the antenna aperture (36) and positioned substantially orthogonal to the plurality of centered slot arrays (32). A first feed guide (46) is coupled to the plurality of centered slot arrays (32) and a second feed guide (56) is coupled to the plurality of notch dipole arrays (34).

Abstract: Apparatus and methods for transitioning between opposite sides of adjacent stripline circuit boards. An orthogonal coaxial connection between opposite sides of the stripline circuit boards is provided wherein a center pin of a coax connector is disposed through the first stripline circuit board and the center trace of one of the stripline circuit boards and through the second board. The center pin is soldered or otherwise electrically attached to a small conductor island pad isolated from the ground plane of the second board and to the plated through hole. The ground of the coaxial connector is connected to the ground plane of the second board adjacent to the isolated conductor island pad.