Abstract: A high voltage protection device for protecting personnel from injury or th as well as damage to radios and vehicles when a whip antenna comes in contact with overhead high voltage power lines or the like and comprises a high voltage coaxial capacitance device which is coupled in series between the upper and lower section of a whip antenna. The capacitive reactance of the capacitance device is very high at power line frequencies and relatively low at RF frequencies. The capacitance element is comprised of two concentric cylindrical conductors formed in a fiberglass shell and separated from one another by a dielectric such as polytetra fluorethylene.

Abstract: A free standing antenna formed with an elongated tubular body portion, having one or more sections, and an enlarged base portion at its lower end for mounting thereof, and the body portion having a plurality of layers or reinforcing filaments, some of the layers being bundles of longitudinal filament rovings running lengthwise, and others of the layers being generally circumferential windings of filament rovings, the layers being bonded together by resin material; electrically conductive elements embedded in the tubular structure, and running from end to end, an annular electrically conductive collar connected to the conductive elements adjacent the lower end of the structure, a female threaded socket connected to the collar, and extending through a wall of the tubular structure for connection from the exterior, at least one layer of woven reinforcing filament cloth material extending up the interior of the tubular structure adjacent the lower end, and overlying the interior of the collar, and, resin bonding

Abstract: A composite antenna element formed of a plurality of high modulus, high strength, low density, unidirectional graphite fibers bonded together by a flexible matrix material and formed into a tapered rod. The element is stored in a coiled configuration within a groove on the device to which it is attached and uses the strain energy stored within it during coiling to uncoil itself upon release into a vertical cantilever column on the order of eight feet high.

Abstract: A new and improved antenna having a body portion which is either constructed from a substantially non-metallic conductor such as carbon or graphite and the like to provide bandwidths, within tolerable standing wave ratios, much wider than is presently obtainable utilizing conventional antennas. Selected areas of the non-metallic conductive body portion may also be coated with a metallic conductor to vary the bandwidth and standing wave ratios as required. In another embodiment, a non-conductive body portion may be coated with both a metallic conductor coating and a non-metallic conductor coating in various relationships to vary the bandwidth and standing wave ratio. Antennas constructed primarily of non-metallic conductors such as carbon or graphite are conducive to use in high temperature applications because only slight changes occur in the antennas operating characteristics over large changes in temperature.

Abstract: An isolator assembly for isolating a transmitting and receiving communications antenna member from a mast and connector. The isolator assembly electrically couples an antenna member to a connector for passage of radio frequency energy but also electrically isolates the antenna member from the connector and the mast from a high voltage on the antenna member.

Abstract: An omnidirectional multiple-band antenna for use with a plurality of simultaneously operating transceivers wherein a common conductor mast is excited by a plurality of stub-elements arranged therearound and each sized and spaced to excite a half-wave portion of the mast.

Abstract: A compression spring is compressed between an internal surface of a cavity within a base and the wide end of a plunger the shaft of which passes through the compression spring and out of a conically countersunk opening of the cavity. A tapered end of a ferrule is pivotally mounted to the external end of the plunger. The ferrule is fixed in a position perpendicular to the axis of the plunger so that when the ferrule is allowed to pivot toward alignment with the axis of the plunger, the plunger is drawn into the cavity by the action of the compression spring until the tapered end of the ferrule mates with the conically countersunk external opening of the cavity restricting motion of the ferrule that is lateral to the axis of the ferrule.

Abstract: A freestanding glass fibre antenna having at least two antenna sections, a lower section having a mounting base and a coupling at the upper end, and having linear radiating members of conductive material, and an upper section having a cooperating coupling at the lower end, and incorporating a single radiating element formed of conductive material, arranged in a helically wound coil fashion having a plurality of turns, and embedded permanently in the glass fibre material of such antenna, the coil wound radiating element being arranged to tune the antenna to the desired frequency range.

Abstract: An antenna for remote and continuous adjustment within a wide frequency range, by variation of the inductance, and hence the length of a small diameter coil, by means of a slide which short circuits the turns thereof, until a full short circuit is reached.

Abstract: Disclosed is a car antenna system which comprises a substantially cylindrical mounting base having a conductor fitted therein and penetrating a car body wall, a mounting member shifted along the mounting base and fixed, a fixing means formed of an insulating material shifted by the mounting member to fix the mounting base to the car body wall, a rod antenna element attached to the outside end of a conductive part of the mounting base, and a loading coil located inside the car body wall and connected between the conductive part and a cable led to a CB-wave transmitter-receiver whereby, the capacitance between the car body wall and the conductive part being lower as compared with a case in which the mounting member is not included.

Abstract: A mobile antenna adapted to be mounted to a motor vehicle includes a vertical radiating element, an antenna base from which the radiating element extends, and a cylindrical mounting pin for mounting the base to a body panel of the vehicle. The mounting pin establishes at one end a first quick-release bayonet-type connection to the antenna base, and a second quick-release bayonet-type connection to a skirt member positioned between the base and the body panel. The base includes a socket for receiving the pin, and a contact member within the socket which engages tabs contained on a first electrically conductive end cap molded into the pin housing to mechanically and electrically connect the pin to the base. The other end of the pin includes a second electrically-conductive end cap which receives a coaxial cable and establishes an electrical connection between the shield of the cable and the inside surface of the body panel.

Abstract: An antenna mount for a retractable antenna has a collapsible spacer to permit the antenna mount to conform to the shape of the surface to which the antenna is mounted. The collapsible spacer has a plurality of cantilever springs formed thereon which permit one end of the spacer to angulate relative to the centerline of the spacer while the spacer collapses in a direction generally parallel to the centerline thereof without significant change in the diameter of the spacer.

Abstract: A mobile antenna includes a radiating element which can be adjusted to an effective length to tune the antenna to a desired operating frequency without changing the physical length of the element. The radiating element is slidably received in a sleeve member positioned within a central bore having a tapered end of progressively decreasing diameter within the antenna base. The radiating element is locked in position by a deformable rim portion of increased diameter on the sleeve which is drawn into the tapered end of the bore and clamped around the radiating element by means of an axially-aligned bolt threaded into the opposite end of the sleeve. The bolt is preferably accessible only when the antenna is removed from its mounting base to discourage tampering with the antenna.

Abstract: An angularly adjustable antenna mounting assembly for mounting a mobile antenna to the exterior surface of a motor vehicle includes a semi-hemispherical mounting shell. The antenna base is secured to the exterior surface of the shell by a pin member which extends through the shell and is retained therein by a retaining plate biased against the interior surface of the shell. The antenna is connected to the other end of the pin member by a quick-release bayonet connection which also serves to establish electrical connection to the antenna. The mounting angle of the antenna is adjusted by adjusting the location of the bridging plate within the shell.

Abstract: A mobile antenna includes a radiating element and an inductance winding for tuning the radiating element for operation on a desired frequency. The inductance winding is supported within the base of the antenna by a core assembly and an overmold layer within which the turns of the winding are partially embedded. The winding is preferably formed with a relatively large diameter and of relatively heavy gauge wire, and the winding support core is preferably formed with a chamber concentric to the winding to improve the electrical efficiency of the winding, and hence the radiating efficiency of the antenna.

Abstract: A portable transceiver antenna is provided with a base suitable for retention by a fishing rodholder or for hand held use and is pretuned to facilitate its use without a ground plane. The antenna includes an electrically conductive rod which may be covered by a dielectric and segmented, and would then include couplings fabricated from ferrules closely fitted over nipples to produce reliable electrical contact through the coupling. The antenna may be used with citizens band, very high frequency - frequency modulated, and similar applications.

Abstract: The antenna disclosed is formed of fiber reinforced resin material, having reinforcing fibers in the form of strands of electrically conductive graphite, the strands being embedded under tension in the shaft of the antenna to provide high stiffness, and the graphite strands being electrically connected with a metal antenna lead-in terminal at the base end of the antenna shaft.

Abstract: A support structure is disclosed for mounting a mobile antenna to a support plate and for connecting the antenna to a coaxial cable. The structure includes an electrically conductive nut adapted for mounting on the support plate, a dielectric cap to receive and house the nut and clamping means disposed between the nut and cap. The nut, cap and clamping means each has a central bore or passage to accommodate the cable. The clamping means is also constructed such that its frictional engagement with the cap is less than its frictional engagement with the nut, such that as the cap is threaded over the clamping means and nut, the clamping means remains generally stationary relative to the nut.

Abstract: A radio frequency antenna comprising a shaft fabricated from dielectric material, and first and second conducting means disposed on the exterior surface of the shaft, the conducting means including linear conductors located on opposite sides of one portion of the shaft and intertwined insulated coils on a second portion of the shaft connected to the respective linear conductors. Tuning members can be connected to the conducting means for selectively changing the resonant frequency of the antenna.

Abstract: A base station radio antenna comprising a bracket having a first section for attachment to a support structure and a second section for receiving antenna whips, an antenna whip extending upwardly from a central opening in the second section of the bracket, and a plurality of antenna whips inclined relative to the upwardly extending antenna whip and extending generally downwardly from openings in the second section spaced radially from, and equi-angularly around, the central opening.

Abstract: The feed point of a whip antenna having a length less than one quarter-wavelength at the lowest frequency of operation is raised above a counterpoise ground plane by a short base sleeve. Gain over a 2.5:1 bandwidth of radio frequencies closely approaches the gain of a standard quarter-wavelength antenna without requiring use of power-dissipating resistance loading. A ferrite transformer at the whip antenna feedpoint is utilized to reduce the high anti-resonance impedance of the broadband whip antenna to the characteristic impedance of a coaxial cable transmission system and to minimize the VSWR thereof. The base sleeve raises the antenna resistance at the resonant frequency near the lower end of the bandwidth to make the transformer effective as an impedance matching element over the entire radio frequency band.A pair of the whip antennas are axially aligned and electrically coupled in series to realize a broadband dipole having increased gain.

Abstract: An antenna coupling enabling the antenna to be quickly detached but incorporating a lock to forestall theft.

Abstract: A whip antenna with a substantially constant impedance over a broad band of radio frequencies includes a mounting section, a high-power-dissipation low-resistance assembly, a first whip section, a second whip section, and a high-impedance quarter-wavelength transformer section concentrically formed around the first whip section and extending from the resistance assembly to the junction of the first and second whip sections. The low-resistance termination is attached close to the base of the antenna and is transformed to a high resistance at the junction of the first and second whip sections at the frequency where the matching section length equals one quarter-wavelength. The resistive power loss only occurs over a limited band centered at the design frequency of the matching section. Instability caused by emplacement of a high-mass resistive termination towards the top of the complete antenna is thus avoided.

Abstract: A multi-rod broadband antenna consisting of a plurality of elementary radiators arranged as directrices of a cylinder each consisting of a conductor surrounded with a ferromagnetic core designed so that each one has a resonant frequency value different from any other one, the resonant frequency values being related so as to form a series. The arrangement of the rods around the cylinder is such that the frequency values of two adjacent rods do not correspond to two adjacent terms of the series.