Abstract: A novel combined feedhorn-supporting spar and feed waveguide of ogival configuration.

Abstract: A lightweight extended aluminum or similar telescopic equilateral triangular tubular mast or tower assembly with coaxially disposed inner triangular sections and cable elevating and lowering drive apparatus for controlling low-resistance telescopic movement with alternate outside-to-inside canted pulley wheels mounted near the top of each section passing the cable downwardly and inwardly of the section to a flat pulley wheel mounted near the bottom of the next inner section.

Abstract: An improved method of and apparatus for forming sheet material into compound curves by drawing, in which critical positioning, dimensioning and relative curvatures of forming bead stages are provided for such curvatures as sectors of paraboloidal antenna reflectors and other compound curve sheets.

Abstract: A biconical antenna for ultra broad-band linear polarization operation in which capacitive sleeve VSWR tuning is effected between the apex regions of the two cones and zig-zag substantially V-shaped spokes are provided conically diverging from the cone base peripheries.

Abstract: A lightweight extruded aluminum tube and longitudinal fin structure and assembly enabling the use of two or three pluralities of identical parts only for ready hand-carrying and erection.

Abstract: A vertically oriented dipole antenna system for filling in overhead radiation or reception coverage with equidirectional-linear polarization (a linearly polarized field vector which lies in the plane of the system's vertical and horizontal axes) having, in combination, a balanced vertically oriented cylindrical dipole the inner adjacent ends of the elements of which are connected to supplemental conductors at points near the inner end of one element substantially ninety degrees apart along the circumference of the element and each extending outward a distance of the order of 0.15 of the wavelength of the mean frequency with which the antenna is to be operated and at an acute angle of the order of 33.degree.

Abstract: A mechanical vibration-tolerant whip antenna having, in combination, a multi-section conical metal tube having successive sections each joined by an internal rigid rod tightly fitting within a corresponding recess in the respective ends of each of the adjacent sections to be joined with the outer metal surfaces of the successive sections providing a continuous smooth external metal surface transition, and each rigid rod extending sufficiently above and below a node of mechanical vibration resonance to provide a rigid support to the node. Additional vibration-tolerance is achieved by vibration damper inserts disposed within the tube near each node of resonance to damp vibration of the tube.

Abstract: This disclosure deals with a three-element unit array (or stacked groups of the same) that enables the use of very large length-to-diameter dipole elements to cover broad frequency bands, greater than 2:1 in frequency ratio, by novel feed structures exciting the element gaps.

Abstract: This disclosure deals with a novel dual-frequency circularly polarized antenna that is particularly adapted for receiving satellite transmissions and/or for transmitting signals to satellites as for navigation purposes, the antenna being adapted through novel conductive preferably spiral-element configurations of different lengths, to produce substantially omnidirectional horizontal coverage and substantially hemispherical vertical coverage at two or more operating frequencies.