Abstract: According to various aspects, exemplary embodiments are provided of bow tie antennas and antenna assemblies that include the same. In an exemplary embodiment, a bow tie antenna includes a pair of antenna elements. Each antenna element includes spaced apart end portions defining an open portion such that the antenna element has an open shape. The open shape is closed by dielectric material disposed between the spaced apart end portions and extending across a gap separating the spaced apart end portions, whereby the dielectric material and pair of antenna elements cooperatively define a closed bow tie shape for the bow tie antenna.

Abstract: A twin-Vee-type dual band antenna includes interconnected first and second conductor arms and interconnected first and second mirroring conductor arms disposed on a substrate. The second conductor arm has a radiator section extending parallel to the first conductor arm. The first mirroring conductor arm is symmetrical to the first conductor arm, and forms an angle (?) of less than 180 degrees with the first conductor arm. The second mirroring conductor arm is symmetrical to the second conductor arm, and has a radiator section extending parallel to the first mirroring conductor arm.

Abstract: A compact digital television antenna having a pair of high band VHF triangular shaped dipoles with VHF signal outputs connected to a pair of terminals. A UHF reflector mounted to a bracket. Each VHF dipole having an outer linear portion connected to the bracket. The outer linear portions of the VHF dipoles forming opposing outer unitary type reflector elements in the UHF reflector. A V-shaped UHF antenna having its UHF signal outputs connected to the terminals. The pair of triangular shaped VHF dipoles forming a pyramidal support holding the UHF antenna at a fixed depth from the UHF reflector.

Abstract: A compact digital television antenna having a pair of high band VHF triangular shaped dipoles with VHF signal outputs connected to a pair of terminals. A UHF reflector mounted to a bracket. Each VHF dipole having an outer linear portion connected to the bracket. The outer linear portions of the VHF dipoles forming opposing outer unitary type reflector elements in the UHF reflector. A V-shaped UHF antenna having its UHF signal outputs connected to the terminals. The pair of triangular shaped VHF dipoles forming a pyramidal support holding the UHF antenna at a fixed depth from the UHF reflector.

Abstract: An antenna assembly is provided for receiving and transmitting radio frequency signals in a range around a characteristic wavelength. A first radiative element, has a first end and a second end and is made from an electrically conductive material. The first end of the first radiative element is electrically connected to an antenna feed at an apex point and at least a portion of the first radiative element is disposed outwardly away from the apex point at an acute angle relative to, and on a first side of, an imaginary plane intersecting the apex point. A second radiative element has a first end and a second end and is comprised of an electrically conductive material. The first end of the first radiative element is electrically connected to the antenna feed and the first radiative element at the apex point. At least a portion of the second radiative element extends in a direction substantially perpendicular to the imaginary plane.

Abstract: In an antenna configuration (3) having a first antenna arm (4) and having a second antenna arm (5), the two longitudinal directions (10, 11) of the two antenna arms (4, 5) enclose an acute opening angle (?) with one another, wherein the acute opening angle (?) has a value of between 15° and 90° and preferably between 25° and 45°.

Abstract: A compact broadband antenna. The antenna includes a first mechanism for receiving input electromagnetic energy. A second mechanism provides radiated electromagnetic energy upon receipt of the input electromagnetic energy. The radiated electromagnetic energy is provided via an antenna element having one or more angled surfaces. A third mechanism directs the radiated electromagnetic energy in a specific direction. In a more specific embodiment, the third mechanism includes a reflective backstop that is selectively positioned behind the second mechanism to reflect back-radiated energy forward of the second mechanism, thereby causing reflected electromagnetic energy to combine in phase with forward-radiated energy from the second mechanism. The third mechanism further includes plural layers of dielectric material.

Abstract: An antenna comprising a rectangular reflector; first and second dipole antennae disposed in front of the reflector and aligned parallel to the long edge of the reflector; rod-shaped first metal conductors arranged parallel to the first and second dipole antennae and separated from the dipole antennae by a distance X1 to the outside in the direction parallel to the short edge of the reflector, and separated by a distance Y1 in the direction perpendicular to the reflector; and rod-shaped second metal conductors disposed at a position separated from the dipole antennae by a distance X2 greater than distance X1 to the outside with respect to each other, and separated by a distance Y2 greater than distance Y1 forward in the direction perpendicular to the reflector.

Abstract: A multi-polarized antenna for transmitting and/or receiving radio frequency (RF) signals, and a method for constructing same, is disclosed. The antenna comprises at least two radiative antenna elements each having a first end and a second end. The second ends of the antenna elements are electrically connected at an apex point and are disposed outwardly away from the apex point at an acute angle relative to and to a first side of an imaginary plane intersecting the apex point. The antenna also includes an electrically conductive ground plane located at and/or to a second side of the imaginary plane.

Abstract: A polarized antenna for sending and receiving polarized radio frequency signals is disclosed which includes a dipole and a reflector plate. The dipole is formed as a single part including the radiating arms and feeding structures, thereby requiring minimum assembly. This dipole can be formed by molding conventional materials, such as copper, aluminum, and plastic, which can then be plated. The feeding structure through which the cable passes features a slotted aperture. The impedance of the dipole is based on the width of these apertures and the size of the cable conductor. By having a single-body construction, the dipole of the present invention provides, good impedance, low intermodulation distortion, good port-to-port isolation, and good pattern purity.

Abstract: A compact L-band antenna includes a plurality of elongated radiating elements arranged in a conical configuration. Ends of the radiating elements are attached to provide a single conductor end, which is attached to a connector structure.

Abstract: A broad band electrically small antenna comprising opposed wire triangular outline shaped elements connected to a source or receiver at their respective apexes and a second set of wire outline shaped elements connected to the base members of the first set of triangular shaped or "bowtie" elements and extending in planes substantially normal to the plane of the triangular outline elements. The antenna exhibits a low antenna factor and relatively high gain and a relatively low voltage standing wave ratio at relatively low frequencies in the range of 20 to 200 megahertz, for example. The antenna may be connected to a log periodic dipole antenna array to provide broad band reception and transmission capability.

Abstract: This antenna has two sets of conductors. Each set is two coplanar triangles with a corner from each triangle at the center and with the two triangle sides opposite those corners being positioned parallel to each other. The planes of the two sets are perpendicular to each other, with the junction of the two planes being close to the imaginary lines through the centers of the parallel sides and the centers of the sets. If the two structures were fed so that the currents in corresponding parts were equal in amplitude and different in phase by 90 degrees, a horizontally polarized omnidirectional radiation pattern would be obtained. Such an omnidirectional antenna would have more gain than a turnstile array of half-wave dipoles with less wind resistance than a Masters super turnstile antenna.

Abstract: An antenna element is disclosed that is a set of approximately coplanar conductors that form four approximately triangular conductors, each of which has a perimeter of approximately one wavelength. Three parallel conductors are the central part and the two outer parts. Joining these three parallel conductors, there are four diagonal conductors, of approximately equal length, that connect each end of the central parallel conductor to the opposite end of each of the outer parallel conductors. Where these diagonal conductors cross, they do not touch. Compared to previous antennas constructed for the same purposes, antennas constructed with these antenna elements can yield more directivity, particularly in the principal H plane, or more bandwidth. Several applications of such antenna elements in various arrays also are disclosed.

Abstract: A broad band electrically small antenna comprising opposed wire triangular outline shaped elements connected to a source or receiver at their respective apexes and a second set of wire triangular outline shaped elements connected to the base members of the first set of triangular shaped or "bowtie" elements and extending generally parallel thereto and spaced from the first set. The antenna exhibits a low antenna factor and voltage standing wave ratio at relatively low frequencies in the range of 20 to 200 megahertz, for example. The folded triangular shaped element antenna is connected to a log periodic dipole antenna array to provide broad band reception and transmission characteristics. A second single plane or folded triangular element or bowtie antenna may be mounted on and electrically connected to the array to improve the operating range of the antenna.

Abstract: An antenna element comprised of an hollow conductor and a central grounded onductor within the hollow conductor, there being a variation in capacitance between the hollow conductor and the central conductor along their length.

Abstract: A horizontally polarized antenna array having extended E-plane beam width, and a method for accomplishing beam width extension. In one embodiment of the invention, an antenna array is provided that comprises a driven dipole element mounted to a conductive means forming a ground plane, the driven dipole element having opposing arms, and a pair of collinear parasitic dipole elements disposed on opposite sides of the driven dipole element, the parasitic dipole elements having opposing arms inclined toward the ground plane such that the opposing arms of each parasitic dipole element are perpendicular to one another.

Abstract: A slot fed antenna is disclosed for use in radiating energy. The antenna includes a flat conductive member having an elongated vertically-oriented slot dividing the member into a pair of horizontally-extending variable-length flat dipole wing elements. Each of the flat dipole wing elements has a vertically-extending rectilinear edge. Also, each wing element extends in width in a direction perpendicular to the rectilinear edge from a minimum at its center and at each of its upper and lower ends to a maximum midway between each of the ends and the center.

Abstract: A biconical antenna is used to measure the intensity of incident RF electrical fields. The antenna comprises a pair of aligned rods with wires distributed around the rods to define conical cavities around each of the rods. A ferrite choke surrounds each of the rods within the conical cavities to choke off residence within the cavities.

Abstract: An apparatus for testing a microwave phased array antenna having a plurality of radiating elements includes a transmission line for signal injection and switching components to selectively establish signal paths from a transmitter, and through a plurality of transmit/receive modules, to a performance monitor. In accordance with the present invention the switching components can be set to establish a receive signal path through the apparatus to test the receive mode of the individual modules. Alternatively, the switching components can be set to establish a transmit signal path through the apparatus to test the transmit mode of the individual modules. Further, the switching components can be set to selectively establish a receive signal path or a transmit signal path through either isolated individual modules or through all modules simultaneously.

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: An FM antenna utilizes a generally rigid conductive element, as a dipole segment, that is connected in electrical communication with a capacitive segment. The capacitive segment can be manufactured from a preselected length of coaxial cable with the central conductor of the coaxial cable being connected in electrical communication with the dipole segment and with the cylindrical conductor, or braided shield, of the coaxial cable being connected to an electrical ground. A variable inductor is connected in electrical communication with the central conductor of the coaxial cable between the capacitive segment and an FM receiver. The central conductor of the capacitive element is connected serially between the dipole segment and the variable inductor. This configuration provides an omnidirectional antenna for use with FM receivers that is relatively small in size and inexpensive to manufacture.

Abstract: Two cosited omnidirectional biconical antennas are respectively tilted plus nd minus 45 degrees (.+-.45.degree.) with respect to the vertical and, therefore, are perpendicular (90.degree.) with respect to each other to effect polarization mismatch and near field decoupling. In combination with the described antennae orientation, high impedance cable chokes are added in series with the coaxial cable antennae feed lines to suppress induced parasitic rf currents.

Abstract: A foreshortened log periodic antenna includes variously configured dipole elements which are arranged in four regions along the axis of the array. The first region includes a series of solid, triangular dipoles characterized by substantially constant base/height ratios. The second region similarly includes a series of solid, triangular dipoles. However, these elements are characterized by decreasing base/height ratios so as to afford a gradual transition into the third region, which includes a single linear dipole. The fourth region includes a series of solid or hollow rectangular elements connected by respective stems to the antenna feedline. In a manner set forth in U.S. Pat. No. 3,732,572, entitled "Log Periodic Antenna with Foreshortened Dipoles", the rectangular elements effect a reduction in the width of the array without a substantial affect on electrical performance.