Abstract: A pole antenna of a hand-held, portable communication device, such as a cellular telephone, is maintained in a substantially vertical orientation. An antenna mast provides a support structure for the antenna. A pivot pin couples a medial portion of the antenna mast to a housing of the communication device. The pivot pin allows movement of the antenna mast about an axis of rotation. A weight is fixedly attached to the lower end of the antenna mast. The action of gravity acting on the weight maintains the antenna mast in a substantially vertical orientation as the housing of the communication device is tilted at an angle.

Abstract: The present invention relates to an extendable antenna for use in a portable radio transceiver. The extendable antenna has a first antenna portion and a second antenna portion connected with a connecting portion of the first antenna portion. The first antenna portion includes a loading coil which is enclosed in a top end cap. When the second antenna portion is retracted into a housing, the connecting portion is held by a holding member disposed in the top of the housing, and the connecting portion is electrically connected with the circuitry of the transceiver via the holding member. In one embodiment, the electrical length of the loading coil is a quarter wavelength, while the physical length of the loading coil is much less than a quarter wavelength. Accordingly, even if the top end cap is the only portion of the extendable antenna located outside the housing, the first antenna portion detects a radio frequency signal.

Abstract: An antenna system (202) provides communication capabilities in both extended and retracted positions. Antenna system (202) includes a base helical (214) that capacitively couples to a half wavelength radiator (222) in the extended position. Base helical (214) capacitively couples to a top helical (228) in the retracted position, thereby reducing case currents on the surface of the housing (206).

Abstract: In order to achieve two-way communications at two different frequencies, an impedance matching circuit is coupled to an antenna. The circuit includes a first inductor which is directly coupled to the antenna. The first inductor induces antenna input impedance to be capacitive at a first resonant frequency and induces the antenna input impedance to be inductive at a second resonant frequency. The first resonant frequency is lower than the second resonant frequency. Further, a first capacitor is coupled to the first inductor. By providing the first capacitor, a reactance component at the first resonant frequency is rendered substantially equal to a reactance component at the second resonant frequency. Further, the circuit includes a second inductor and a second capacitor which are coupled between the second means and a feeder.

Abstract: An extendable and retractable antenna installed on a body housing of a portable radio apparatus includes a helical antenna having an antenna cap protruding from a top portion of the body housing, a helical winding disposed within the antenna cap, a rod antenna extending through the antenna cap, and a feeder disposed at a bottom portion of the helical antenna. The helical antenna is operated when the antenna is retracted. The rod antenna is insulated from the helical antenna when retracted, and passes through the helical antenna to protrude from the body housing when extended. The feeder operates the rod antenna when the rod antenna is extended and operates the helical antenna when the rod antenna is retracted.

Abstract: An antenna assembly for a radio includes an antenna shaft which is translatable between a retracted position and a protracted position. The antenna shaft is translatable through a support tube which is affixed in position with the radio. A detent engages with the antenna shaft to maintain the antenna shaft in either the retracted or the protracted position.

Abstract: An antenna protecting device for motor vehicles including a triangular base having a cavity at an inner bottom thereof, a spherical container having a neck portion rotatably connected with the triangular base and provided at a bottom with a spring-loaded ball, a bracket extending upwardly from the spherical container and having a platform at an upper end, a hemispherical seat engaged with a lower portion of the spherical container and having an orifice which is smaller than the ball in diameter, a protective rod partly inserted in the spherical container through the bracket, and an antenna connected with the platform of the bracket.

Abstract: An antenna mounted on and retractable into a casing of a portable radio communication apparatus. When the antenna is pulled out of the casing, it plays the role of a .lambda./2 whip antenna. Even when the antenna is retracted into the casing, it has substantially the same gain as when pulled out from the casing.

Abstract: A capacitively coupled high frequency broad-band antenna comprising a stub having a tubularly shaped lower end that is capacitively coupled to a first terminal element for the center conductor of a transmission line. The outer conductor of the transmission line is connected to a base support element which is accurately spaced from the first terminal element by a dielectric spacer element; and the three elements are encapsulated and hermetically sealed by a plastic molded housing.

Abstract: An electric extensible car antenna including an antenna element support cylinder detachably mounted to a cylindrical support member of an antenna attachment base from the outside of a car body; a single small-diameter rod antenna element inserted in an antenna element insertion hole of the support cylinder so as to be in contact with a conductive contact element; the proximal part of the antenna element led toward the proximal end of the support cylinder being guided in a direction by an antenna element guiding tube; and an antenna element extended and retracted by a rack-equipped flexible rope connected to the antenna element via an electric mechanism. It is desirable that the antenna element be made of an ultra-flexible material and that the support cylinder is made of a plurality of separate cylindrical units.

Abstract: An antenna assembly comprises an elongate radiating antenna (11) movable between a retracted position and an extended position. A pair of concentric conductors (9,10) provide coaxial feed to the antenna (11). In the retracted position the antenna 11 in conjunction with the coaxial feed (9,10) constitute a quarter wavelength transmission line which is short-circuited by a conductive flange (15) on the antenna. A short-circuited quarter wavelength transmission line electrically appears as an open circuit at the feed point. The antenna is thus automatically decoupled when it is moved to the retracted position without the need for additional switching or screening elements.

Abstract: A cover for the base element of a magnetically mounted vehicle antenna in the form of a bag having a closure is provided to protect the finish of a vehicle's surface from blemishes due to repeated removal or placement of the magnetic mount and movement caused by high vehicular speeds. Various types of closure are provided for the cover bag such as a snap, zipper, hook and loop fastener, elastic banding, drawstring or combinations thereof. The cover may be made from cloth or a leathery material or a combination thereof. The cover bag may be colored for aesthetic and/or protective reasons.

Abstract: The invention concerns a combination of a transmitter/receiver (12, 13) having a predetermined frequency/wavelength and an antenna (15), the antenna comprising a coiled wire portion (16) one end of which is connected to the output (14) of the transmitter/receiver and a straight wire portion (17) one end of which is connected in series to the other end of the coiled wire portion, the combined length of the portions being no more than one quarter wavelength, the inductive reactance of the coiled wire portion (16) being selected to both substantially tune out the capacitive reactance of the transmitter (12, 13) and the capacitive reactance of the straight wire portion so that the overall impedance of the system is predominantly resistive, and at least the majority of the coiled portion (16) being external to the conductive portion (12) of the transmitter so as to effectively add to the electrical length of at least the straight portion (17) and itself act as a radiator.

Abstract: A free standing antenna for use in associations with high-stress environments subjecting the antenna to extremes of flexing stress and temperature stress and chemical stress, the antenna having a mounting base portion which can be secured to a base adjacent to the high-stress environment, the base member being formed of glass fibre reinforced resin materials containing fibres extending in a longitudinal direction, along the axis of the base, and further fibres running in a generally annular fashion in planes generally transverse to the axis, and the base member further defining a fastening flange, a plurality of fastening holes formed in the flange, a generally tapering neck portion extending upwardly from the fastening flange, and a generally cylindrical junction head extending upwardly from the neck, the head and the neck being located along a common central axis, and an antenna column secured to the cylindrical head, the column being formed of hollow tubular metal defining outer and inner wall surfaces, an

Abstract: A whip antenna made of a material having high tensile strength, such as stainless steel, including a tapered antenna body and a rounded end, both formed as a single integral unit. The antenna is formed by beating a rod having high tensile strength towards its center and pulling the rod in one direction to form the rod into a tapered shape and forming a rounded top section at the tapered end.

Abstract: An antenna assembly comprises an elongate antenna element (11) mounted in a support (5) and movable between a retracted position (see FIG. 2) and an extended position (see FIG. 1). A helical antenna element (12) is carried at one end of the elongate element. The support (5) comprises a pair of concentric conductors (9,10) which provide a coaxial feed to the antenna elements (11, 12). Suitably the support (5) comprises a dielectric tube (6) having respective conductive portions (9,10) provided on the inner and outer faces thereof. The elongate antenna element is slidably mounted within the central conductor (9). In the retracted position both ends of the elongate antenna element are electrically connected to the central conductor (9). The elongate antenna element is thus rendered inactive as a radiating element and essentially becomes part of the central coaxial feed coupled directly to the helical antenna element.

Abstract: A vehicle antenna for AM/FM and MT waves including a first antenna element for MT waves vertically mounted on the vehicle roof and a second antenna element for AM/FM waves rotatably coupled to the top end of the first antenna element so that the second antenna element can be set at a desired angle relative to the roof of the vehicle. A trap element for blocking MT waves is installed near the lower end of the second antenna element.

Abstract: An antenna rod, comprises an antenna lead passing inside the rod and a layer of polymer material outside the antenna lead. The antenna rod has improved characteristic features because the antenna lead has been immersed into the polymer material layer. The antenna rod is produced by inserting the antenna lead longitudinally in a cavity of a casting mold, which is substantially of the shape of the antenna rod and thereafter encapsulating the antenna lead with a polymer material layer. The antenna lead can be reinforced for casting by joining it with a support structure by winding the lead to form a helical coil around the support structure.

Abstract: An elongated rod 11 of dielectric material, for example fiberglass--plastic or the like, has a central conductor (12) located coaxially therein, the conductor having a length L=3/2 .lambda.; in the central .lambda./2 range, the insulating rod is surrounded by a conductive layer (13, 16, 20, 25), for example of conductive lacquer, a mesh or braid of conductive material, a conductive foil or tube or the like. In the lower .lambda./2 region of L1, the bottom terminal of the central conductor will provide a high resistance output for the higher one of the frequency ranges which, for example, can be a radio telephone, or vehicular communication frequency of between 450-470 MHz. The entire antenna is suitable as an AM-FM/radio-telephone combination antenna. .lambda. is the median operating wave length of the higher one of the frequency ranges for which the antenna is suitable. Preferably, the antenna is covered with a sleeve of insulating material, for example a heat shrinkable plastic (27).

Abstract: An antenna used for a plurality of frequencies in common according to the present invention has two signal feeding systems for an integrated antenna. The antenna is so constructed that the signal feeding systems are perfectly isolated in DC from each other through a capacitor and at the same time in high frequency, only the signal system for the car telephone frequency band, which is a communication with a moving body, is coupled with the whole antenna, while the signal system for the AM/FM radio frequency band is separated from the antenna radiator portion (radiating element) working at the car telephone frequency band. Owing to a great difference in the frequency between the AM/FM radio frequency band and the car telephone frequency band, no disturbance such as mutual interference, etc. is produced and thus it is possible to obtain stable signal systems separated from each other.

Abstract: A whip antenna for vehicles including a feeder terminal directly coupled to the base of the whip antenna element. The coupled portion is inserted into a cylindrical attachment base, and the cylindrical attachment base is filled with an insulating material so that the insulating material envelopes the entire coupled portion with the pointed tip end of the feeder terminal exposed from the insulating material.

Abstract: An apparatus used in search and rescue operations that combines the features of a dragstick with the features of a radio antenna. The apparatus is comprised of an aluminum rod split into two, adjustably connected sections. At one end of the rod is a metal spike, The metal spike is used to make identifying marks in the ground thereby allowing the searcher to retrace his steps. At the other end of the rod is an electrical connector which allows the rod to be coupled to a standard two-way radio via coaxial cable. When current flows through the rod it acts like a half wavelength, omni-directional antenna. One of the two sections can be extended from or retracted into the other section, thereby varying the operating frequency of the rod when the rod operates as an antenna. An insulated grip allows the user to hold the rod while electrical current is flowing therethrough.

Abstract: An assembly, and associated method for constructing such, for connecting an electrical circuit to an electrical cable, such as an antenna connector pin, or, alternately, to a coaxial transmission line. An antenna circuit board includes a circular aperture extending therethrough for receiving a socket member to be supported thereat. Angled, segmental-slots are formed about the circular aperture and receive projecting prong-members of a clip member. The socket member receives the electrical cable, such as the antenna connector pin, or a coaxial conductor pin therein. The clip member engages with a coaxial tube of the coaxial transmission line. The assembly permits alternate connection thereto of either the electrical cable or the coaxial transmission line thereat.

Abstract: An electrical transmitter-receiver, particularly useful as a CT2 cordless telephone, includes a quarter wavelength antenna rod carried by the housing, and a quarter wavelength antenna coil carried by one end of the antenna rod. The antenna rod is movably mounted through an opening in its housing to a retracted position wherein substantially only the antenna coil is disposed externally of the housing, or to an extended position wherein substantially the complete antenna rod and the antenna coil are disposed externally of the housing. When the antenna rod is in its retracted position an electrical switch connects the antenna coil to the electrical circuit, and when the antenna rod is in its extended position an electrical switch connects the antenna rod to the electrical circuit.

Abstract: A deployable crossed log-periodic dipole array antenna includes a plurality of bays, each associated with four elongated, flexible antenna elements, each element having an S-shaped cross-section for stiffness. Each bay also includes a spool. The spools have a "squared circle" shape adapted to the natural curvature of the antenna elements. A drum surrounds and is coaxial with all the spools, and the antenna elements extend through apertures in the drum. Rotation of the drum winds and unwinds the flexible antenna elements from their spools simultaneously. When the drum begins to wind for retraction of the elements toward a stowed condition, some bays are arranged so that the elements begin to wind about the spools immediately, whereas other bays are arranged so that the antenna elements rotate about hinges over an angle such as 90.degree. or 180.degree. before beginning to wind onto their spools.

Abstract: A rod antenna mounting mechanism that allows easy and reliable connection of a rod antenna with a radio circuit arranged inside and easy replacement of itself. The rod antenna is installed by fixing a rod holder slidably attached to the rod antenna such that it can be pulled out, and stowed in, the casing. With the rod antenna mounted to the casing, an elastically deformable feeder plate connected to the radio circuit is pressed into contact with a conductive pipe-like portion of the rod holder, thus enabling electrical connection of the antenna element with the feeder plate.

Abstract: An antenna device having a straight shaft extending from a mount member to be attached to an electronic device, and a cylinder member which comprises an antenna member and slidably fitted around the shaft in intimate contact therewith to define a generally airtight chamber by the outer end of the shaft and the inner surface of the cylinder member. The cylinder member is projectable outward along with the antenna member by an urging force when released from a lock member, the cylinder member being so projectable at a reduced speed by giving a negative pressure to the chamber.

Abstract: A telescoping antenna structure suitable for use in a portable transceiver for increasing the level of radiated or received r-f energy while in a collapsed position and also obtaining the maximum permitted level of radiated r-f energy while in an extended position. The increase in r-f energy in the antenna while in the collapsed position is obtained through use of a projectable sliding member affixed to the antenna which comes in contact with and makes electrical changes to antenna tuning circuitry when the antenna is adjusted from the extended position to the collapsed position.

Abstract: A screw type coupling device includidng a male screw element formed by installing a coil spring form helical component on the outer surface of a columnar element and a female screw element formed by installing a coil spring form helical component in a tubular element so that the two helical components are screw engaged with each other. With the application of such coupling device to an antenna for vehicles, the antenna having the male screw element at the base is removably attached to a vehicle body by screwing the male screw element of the antenna to the female screw element installed in the vehicle body.

Abstract: An improved transceiver antenna is designed for mounting on vehicles where, for aerodynamic reasons, vertical orientation is undesirable. It is an object of the present invention to provide a high-gain antenna which, even when mounted at a declination of up to 40.degree. from the vertical, maintains the most smoothly curved possible antenna characteristic. This is achieved by winding four serially connected coils (SP1-SP4) on a rod (12) of dielectric material, with the third coil reverse-wound with respect to the second, with a radiating element (13) connected to the free end of the fourth coil, the lengths of the coils and radiating element being selected to be, respectively, 1/4, 1/4, 1/8, 1/8, and 3/8 of the median wavelength. Upon mounting at an angle of 40.degree. to the vertical, this antenna has an optimal antenna characteristic curve.

Abstract: An adapter (13) for enabling an external antenna, e.g. an antenna fitted to a vehicle, to be connected in place of an existing antenna (7) on a radio, particularly a portable radio telephone (1). The adapter is slidably located in a passageway (6) which may be part of an integral moulding of a radio casing (2). The existing antenna (7) may be slidably located in the passageway such that it can be displaced and so disconnected from the radio when the adapter is fitted. Alteratively, the radio has an internal existing antenna which is switched out when the adapter makes an external antenna connection, e.g., by means of contacts (15,16) mounted in the adapter and in the passageway (FIGS. 3 and 4). The slidable antenna (7) may be in the form of a tape having a bowed cross-section.

Abstract: For a vehicle which sometimes requires two-way radio communications but which sometimes requires an ordinary appearance, for example an unmarked law enforcement vehicle which could be compromised by the conspicuousness of a conventional communications antenna and associated external mounting hardware, this antenna system provides an external antenna rod which is readily deployable and removable from within the vehicle. The novel mounting hardware is highly inconspicuous since its exposed area is very small and is made flush with the surrounding vehicle body surface. In the mounting assembly, an insulated bushing, carrying a socket having a contact sleeve, has a small aperture in line with the contact sleeve, forming a passageway through the vehicle body through which the external antenna rod may be deployed. Alternatively, an internal antenna rod may be readily deployed in the same mounting assembly to project inwardly, enabling covert limited range communications.

Abstract: An inside antenna is provided comprising a housing, a capacitor and an inductor located within the housing and cooperating to form an LC network, a radiator connected to the inductor, and a coaxial cable with its central conductor tapped to a selected location of the inductor. The capacitor is formed by a radiator plate to which the radiator and inductor are connected and a ground plate. A set screw is carried by the housing and engages the ground plate so that movement of the set screw varies the position of the ground plate relative to the radiator plate.

Abstract: An automobile antenna fastening device comprising an inner fastening assembly and outer fastening assembly. The inner fastening assembly includes a gland washer made of an elastic material and a gland base, and the outer fastening assembly includes a pad and fastening nut. An antenna is mounted on the automobile body wall by clamping the automobile body wall between the outer and inner fastening assemblies, and the clamping force of the fastening assemblies is maintained by the elastic deformation of the gland washer of the inner fastening assembly.

Abstract: A window-mounted cellular mobile telephone antenna includes an outside module for mounting on the outside surface of a vehicle window in registration with an inside module mounted on the inside surface of the window. The outside module includes a capacitive coupling element and a generally vertical radiating element not less than 5/8 wavelength at the antenna operating frequency. The inside module includes a self-contained electrical circuit forming a ground-plane for the radiating element, an inductor for matching the impedance of the radiating element to that of a coaxial feedline, and a capacitive coupling element interacting with the coupling element of the outside module and the dielectric of the window glass to form a coupling capacitor. The length of the radiating element may be increased beyond 5/8 wavelength to reduce impedance matching requirements in the inside module.

Abstract: A high frequency antenna that is particularly suitable for marine environts. The high frequency antenna has a metallic base flange, a metallic spring assembly for permitting flexibility and shock resistance and a metallic sleeve all maintained at ground potential so that the antenna is immune to being shorted out such as by salt water and preferably comprised of stainless steel. The radiating element of the antenna is formed on a fiberglass rod and is comprised of a flat, ribbon-like conductor or a plurality of wires approximating a ribbon like conductor. The radiating conductor is wound around the fiberglass rod such that the wound or wrapped areas have a width that is substantially equal to the non-wrapped areas on the rod to permit the ribbon-like conductor to radiate from both sides in order to achieve a low profile antenna.

Abstract: An antenna base having a metal foot and plastic bezel injection molded around the metal foot to engage the metal foot. Double sided adhesive tape connects the antenna base to a non-conductive surface of a motor vehicle. In most instances this is a motor vehicle windshield. Inside the motor vehicle a coupling box connects communications signals from a signal source through the windshield to the metal foot. The coupling box supports a printed circuit board having conductive patterns on both sides for sending and receiving these communications signals. The metal foot also includes structure that allows an elongated antenna to be adjustably supported by the base in a signal sending and receiving orientation.

Abstract: A drive control device for an electrically-driven extending and retracting antenna such as an antenna on an automobile including a motor-driven rotary plate which makes approximately one revolution during the time for complete extension or retraction and has attached, on one side, a disk-shaped conducting part with a small cut-out. Of the three contacts, the first is ordinarily in contact with the disk-shaped conducting part, maintaining a state of electrical continuity, the second contact contacts the small cut-out when extension of the antenna is completed; and the third contact contacts the small cut-out when retraction of the antenna is completed. As a result, electrical continuity is maintained during extension or retraction of the antenna, but not when extension or retraction has been completed. The first and second contacts thus constitute a limit switch for antenna extension; and the first and third contacts constitute a limit switch for antenna retraction.

Abstract: An antenna for a portable cellular telephone includes a quarter-wavelength ground radiator and a helical coil capacitively coupled to an extendable half-wavelength radiator. The extendable half-wavelength radiator includes a metallic coil molded in plastic. The ground radiator includes a serpentined transmission line on a flexible circuit board. The helical coil and ground radiator are coupled by a transmission line to a duplexer. The duplexer couples transmitter signals from a radio transmitter to the antenna and receiver signals from the antenna to a radio receiver. The antenna may be advantageously utilized in any portable radio applications where small size and immunity to hand induced radiation losses are desired.

Abstract: An antenna system for a portable radiotelephone which does not require an expensive mechanical and bulky change-over switch to switch between the transmitting and receiving main antenna element and the call signal-receiving sub-antenna element. This is accomplished by a rod-shaped transmitting and receiving main antenna element within an antenna retaining mechanism so designed that the antenna element is free to slide in and out of the case of the radiotelephone. This case also houses a sub-antenna element which is in constant electrical contact with the antenna retaining mechanism. Conductive components in the elements provide the switching function, and one of them, a conductive tube, is constantly connected to the transmitter-receiver set in the case so that there is no deterioration of the characteristics of the main antenna element.

Abstract: An improved transmitting and receiving antenna for a portable radiotelephone with an antenna element which can be accommodated inside of the case of the portable radiotelephone, compensating for the drop in reception sensitivity that occurs when the antenna element is located inside of the case. The rod-shaped antenna element freely insertable into and removable from the case, and electrically connected to an antenna retaining mechanism both when the antenna element is retracted and extended. Thus, the antenna element functions even when it is located inside of the case. Moreover, an auxiliary antenna element is connected to the antenna element when the latter is located inside the case. The inductive reactance component of the auxiliary antenna element compensates for deterioration of the Standing Wave Ratio caused by the increased stray capacity resulting from the antenna element being located of inside the case.

Abstract: A removable rod antenna comprises a first fitting for rigidly coupling to a radio body; an elongate rod-like antenna body; a second fitting of complementary configuration for engaging the first fitting, and a retaining arrangement for holding the second fitting in captive relation on the antenna. Respective mating fastener portions are defined respectively on the first and second fittings for removably engaging each other in electrically conductive contact to thereby removably mount the antenna body to the radio body in electrically conductive contact with the first fitting thereon.

Abstract: Ultra-broadband impedance matched electrically small self-complementary pair antennas using thin wire elements with impedance inverting feed are presented. Efficiencies are determined by achieveable loss resistances in the radiating structure itself, rather than the (limited) quality of an external loading coil, and by energy channeled into the difference port of the feed hybrid, that is used to match two complementary impedances. Broadband impedance loci are achieved for thin radiators by impedance inverters placed prior to the complementarizing circuit. Impedance matching is then accomplished in a standard broadband hybrid or "Magic Tee" feed circuit.

Abstract: The present invention is a high frequency antenna for use in vehicular radio communications which is disguised to resemble a low frequency antenna of the type ordinarily used on vehicles to receive the standard AM-FM broadcast bands. In the preferred embodiment, the antenna consists of three tubular conductive sections that are held in spaced relationship to one another by the use of insulators, which insulate the sections from each other.

Abstract: A supplemental device is provided for mounting on a rod-type antenna for CB radio, cellular telephone, telephone, television and satellite communications for reducing the overall noise level in connection with the operation of, for example, the squelch control structure of the associated radio apparatus. The device comprises a pair of assemblies each having at least one ring and a plurality of cooperable radially-extending rods symmetrically arranged and intersecting the axis of the associated ring or rings, with such rings and rods secured in rigid relation any lying in substantially a common plane. The assemblies are disposed in spaced parallel planes and rigidly connected substantially of their common axis by a cross member which is adapted for adjustable securement to an antenna, whereby the supplemental device may be secured to the antenna at an optimum location therealong, with the antenna extending in a plane parallel to and between the first-mentioned planes.

Abstract: Unidirectivity is achieved in an antenna including a microstrip portion and a unipole portion. The microstrip portion includes a ground plane conductor, a radiation plane conductor dielectrically spaced from the ground plane conductor, and a conductive member connecting the radiation plane conductor to the ground plane conductor., The unipole portion of the antenna comprises a unipole coupled to the radiation plane conductor. The radiation fields of the microstrip and unipole portions intensify each other in a single direction to achieve unidirectivity.

Abstract: A mast mounting assembly is provided for supporting a safety flag mast, communication antenna or the like. The novel assembly comprises a mounting bolt that can be permanently attached to a vehicle with the free end of the bolt extending in an upright position. The free end of the bolt has a drilled bore opening to receive and anchor the lower base end of the mast. A collar has a pair of bore openings extending from opposite ends thereof, one of the openings being smaller in diameter through which the base end of the mast can be press-fitted, the other of the openings adapted to be press-fitted over the mounting bolt. The collar is made of a hard resilient material, such as a urethane plastic, to provide a resilient support to the base of the mast for dampening the oscillations to prevent injury to the vehicle operator. In event of damage to the mast, such as by vehicle roll over, the collar can be pulled off the mounting bolt and the mast without the need for any tools.

Abstract: The present disclosure describes an antenna which may be collapsed and stored in a compact configuration and readily released from storage to assume a deployed operative state. More specifically, the antenna is a wire member comprised of a straight section and an integral transverse helical spring section. The antenna lends itself to storage about the axis of a right circular cylinder while permitting full deployment parallel to the longitudinal axis of the latter. This arrangement permits the storage of potential energies of torsion and bending respectively in the helical spring and straight portions of the antenna, and permits continuous motion in these planes to effect antenna erection and deployment.

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: An antenna is provided which includes a first closely wound coil spring member of electrically conductive material. A second closely wound coil spring member which is substantially smaller than the first spring member is wound around a portion of the first spring member adjacent one end thereof. The second spring member is anchored to the first spring member by solder which is flowed into the coils of the first and second spring members where they contact each other. The end of the flexible first element to which the second member is attached is situated within a housing of rigid materials having first and second ends which include upper and lower apertures, respectively, the second spring member is fixedly held between the first and second ends of the housing.