Abstract: A universal antenna mounting system includes a grid-like mounting frame on which the antenna is installed. A mounting pipe is secured to a tower leg at a desired height and the mounting frame is then secured to the mounting pipe. The mounting connections are all frictional in nature and the mounting frame is adjustable in azimuth about the mounting pipe so that the antenna can be pointed in the right direction. Side struts secured to the mounting frame and the tower maintain the mounting frame at the desired azimuth.

Abstract: An enclosed multi-user telecommunications tower covering multiple antennas at various heights with communication passages allowing an operator to move internally between modules containing antennas. Individual adjustment and orientation of the antennas for each provider (or their replacement) is thus readily possible within the tower. The tower preferably comprises lower support modules of reinforced concrete and a steel tower for supporting the antenna systems. The latter is covered with a RF transparent skin covering of a fiber reinforced plastic. The communication means takes the form of an annular space between the steel tower support and the RF transparent skin covering wherein the multiple antennas are supported.

Abstract: A cell site pole assembly is integrated with various antennas and pole components so that the pole assembly can be readily installed at a cell site without the need for extensive wiring, pole component assembly or the like. The pole assembly also includes a lightweight fiberglass housing which surrounds the antenna but does not interfere with antenna functioning. The pole assembly can have a counterbalance system to easily raise or lower the housing for access to the antenna. The pole assembly is designed to employ other features such as lighting or decorative/symbolic components to enhance the aesthetic appearance of the pole when situated in a community environment.

Abstract: An antenna mounting platform for mounting along the length of an elongated mast pole. The antenna mounting platform includes a frame assembly having a peripheral edge and an interior opening to enable access to the platform by service personnel. The frame assembly includes a walkway extending along the peripheral edge, the walkway having a width and an inner edge. The antenna mounting platform also comprises at least one antenna support arranged for supporting an antenna. The antenna support includes a bracket for slidably mounting the antenna support to the peripheral edge of the frame assembly for locating the antenna support at selectable positions along the peripheral edge of the frame.

Abstract: A feed assembly waveguide interface (10) between an antenna (12) coupled onto an upright post (14) and an outdoor radio (16), comprising a feed tube (18) connected at a first end (20) to a sub-reflector (22) and a second end (24) having a waveguide output (26). A structure (28) is for affixing the feed tube (18) internally within the antenna (12), so that the second end (24) will extend outwardly from a rear wall (30) of the antenna (12). An assembly (32) for spring loading the feed tube (18) on the affixing structure (28) will allow the second end (24) to be forced outwardly away from the rear wall (30) of the antenna (12). When the outdoor radio (16) is mounted to the rear wall (30) of the antenna (12), a positive interface connection will be made between the outdoor radio (16) and the antenna (12), thus making a solid mechanical connection between the outdoor radio (16) and the antenna (12), as well as a proper electrical and environmental seal.

Abstract: A VHF-UHF waveguide non-metal and metal detector is disclosed having a waveguide antenna system of aluminum tubing with 4 aperture/slits at critical angles including dielectric centers in conjunction with a waveguide collector system of 2 sets of conical collectors mounted on a main unit containing a waveguide diaphragm and waveguide receiver case including receiver antenna wires with no metal contact.

Abstract: A combined satellite and terrestrial antenna has a reflector dish formed of a conductive metal supported by but electrically insulated from a support structure. A pick-up for the satellite transmission signal is also supported by the support structure at a position to receive satellite microwave signals reflected from the dish. An electrical connector is attached to and in electrical contact with the metal of the dish and a transmission line extends from the connector to transmit UHF/VHF signals which are received by the metal dish itself. The UHF/VHF signals may be combined with the signals from the satellite pick-up and transmitted together on a common transmission line leading to a receiver. A loop section may be connected by swivel connectors to the periphery of the reflector dish to be in electrical contact therewith to further enhance the reception of UHF/VHF frequencies. The loop section may be adjusted to a position either in the front or the back of the dish to maximize reception of UHF/VHF signals.

Abstract: An antenna unit comprises at least one base mount metal member fixed to a strut; a fixing structural portion for rotatably fixing the at least one base mount metal member to the strut so as to be capable of rotating around the strut; an antenna integral-type radio transmitter-receiver apparatus fixed to the base mount metal member; and an elevation adjustment mechanism for adjusting an elevation of the antenna integral-type radio transmitter-receiver apparatus. An azimuth adjustment of the antenna integral-type radio transmitter-receiver apparatus is carried out by rotating the base mount metal member together with the antenna integral-type radio transmitter-receiver apparatus around the strut.

Abstract: A base station for a mobile communication has flat antennas and sunshades. The flat antennas and sunshades are attached to portions of outer walls of a transceiver to cover the portions. The flat antennas function as a sunshade. The flat antennas are attached to such portions of the outer walls for optimum transmission and reception of radio wave, while the sunshades are attached to another portions of the outer walls.

Abstract: A mounting assembly for securing an antenna to a supporting structure, the assembly comprising a main frame including at least two frame members coaxially aligned about a common vertical axis, the main frame having an antenna mount end and a support mount end. The assembly further includes a main frame support extending transverse to each of the at least two frame members, the main frame support is connected to the main frame at the support mount for support thereof. A mounting bracket is provided for securing the main frame support to a supporting structure, for example an electric power transmission tower, and in a position adjacent thereto, the mounting bracket has a first end for connection to the main frame support and a second end for inner connection with the supporting structure whereby an antenna affixed to the main frame is secured to the supporting structure in a spaced relation therefrom.

Abstract: A small sized multi sector antenna having a plurality of sectors or element antennas each having related directivity in horizontal plane so that one of the element antennas is selected for providing desired beam direction has been found. Each of the element antennas is planar or in flat disc shaped, and is, for instance, a micro-strip antenna. Each of the element antennas is located in vertical plane, and each element antenna is positioned at different height from one another so that each element antenna does not overlap with other element antennas in vertical direction. A central vertical axis of the sector antenna is defined and the element antennas are positioned with axial symmetrical relations relating to said axis.

Abstract: An integrated enclosure and antenna support tower for telecommunications equipment, such as cellular telephone, radio transmitter/receivers. The enclosure includes a generally rectangular tubular steel frame including vertical column members, roof purlins and roof rafters welded together to form a frame for supporting exterior wall paneling and roof decking. A cylindrical cross-section metal plate tower section is supported on the enclosure frame by a plurality of webs interconnecting the tower section with the frame to transfer the weight of the tower to the frame column members. Conventional antennas or antenna truss type towers may be mounted on the tower section connected to the enclosure. The tower section may serve as a duct for enclosure ventilation air for intake or exhaust of such air at an elevation substantially above ground level. An air intake or exhaust plenum may also be mounted directly adjacent to or formed as part of the enclosure.

Abstract: An antenna array is disclosed in which a central vertical mast supports four radially extending struts. One loop of conducting elements, the director, is supported on the mast above the struts, on the mast below the struts and at the centrifugal end of two adjacent struts. A second loop of conducting elements, the reflector, is also supported on the mast above the struts and on the mast below the struts, and at the centrifugal end of the other two remaining struts. When the length of the director loop is smaller than the reflector loop and the reflector and director are both driven 180.degree. out-of-phase of each other, the antenna functions similarly to a Swiss Quad antenna, but has structural and weather-resistant advantages over the Swiss Quad.

Abstract: For use with an antenna tower, the antenna tower providing a mount for an active antenna that is subject to misdirection when the antenna tower sways, a system for, and method of, dynamically counteracting sway in the antenna tower. The system includes: (1) a rotation detector that senses a rotation, relative to a fixed reference plane, of a portion of the antenna tower proximate the active antenna and develops a sway signal indicative thereof and (2) antenna beam steering logic, coupled to the rotation detector, that receives the sway signal and modifies a drive signal provided to elements of the active antenna to redirect a beam projecting therefrom, the drive signal thereby compensated for the rotation to counteract the sway in the antenna tower. The system may form a portion of a wireless communications station.

Abstract: The present invention relates to an antenna module for installation on a wireless telecommunications tower at a transceiver site. The antenna module comprises a frame adapted to be installed on the upper end of the tower, containing a means for mounting, and adjusting the alignment of, one or more panel antennas for optimal signal transmission and reception. A radio frequency energy transparent cover surrounds the antenna module, extending height-wise of the frame, enclosing it, the mounting means, and the panel antennas mounted thereon, thereby reducing wind loading on the antenna module.

Abstract: An omni directional coverage multibeam antenna relief on a ground surface having simple conical shapes to provide beam steering. One advantage of such a system is that the projected area is always constant and broadside to the intended direction resulting in limited scan loss effects. In the case of a cylinder as the conical shape, z-axis symmetry provides a constant antenna aperture projection in any azimuthal direction. Using this geometry, high level, side lobes are reduced considerably because of the natural aperture tapering from dispersion effects. These side lobes are further reduced by the presence of parasitic elements which also result in the added benefit of an increased front and back ratio. This front to back ratio may be further increased by the use of inverted cosine energization of selected antenna elements.

Abstract: Performance of multibeam cellular antenna systems is improved by use of space diversity in antenna placement and angle diversity in antenna alignment. Space/angle diversity is achieved on a single tower structure (20) by placement of eight antennas (B1-B8) in pairs at four spaced locations (I, II, III, IV) at the tower corners. Antennas are placed with an orthogonally directed pair at each location. For each orthogonal pair (e.g., B1 and B2 at location I) there is an antenna located at a different corner which is pointed between the orthogonal directions (e.g., B5 at location II). Antenna placement and alignment for achieving space/angle diversity in triangular tower configurations are also described.

Abstract: An antenna base has a holding structure for installing an antenna directly thereon. The base also has a base plate with an axis perpendicular to the axis of an installed antenna. An antenna mounting plate is suitable for having the base plate affixed to it. The antenna mounting plate is supported relative to a pole clamp by a spherical shell. The mounting plate, exposed through an opening in the shell, is supported for rotating about a horizontal axis passing through the plate to provide for elevation angle adjustment. Locking screws are used to secure the adjusted elevation angle. The pole clamp has a pair of axially spaced tracks that define an arcuate path that extends circumferentially around at least a portion of the clamp. The shell is held in position adjacent to the clamp by two pairs of guide elements in a way that allows the shell to move along the arcuate path.

Abstract: An antenna system is presented having a feed for feeding an antenna and apparatus for supporting the feed. The system includes a vertically oriented, electrically conductive hollow mast which carries first and second groups of vertically spaced bays of radiating elements. Each bay includes an arrangement of N radiating elements extending outward from the mast. N vertically oriented electrically conductive, hollow feed support members are spaced away from the mast. Each support member carries an elongated feed conductor extending vertically within the support member. The support members extend vertically upward coextensively with that of the mast to approximately midway between said first and second groups of bays. N hollow electrically conductive, coupling arms are provided and each arm extends between the mast and one of the N support members. Each arm carries first and second conductors each connected at one end to a feed conductor.

Abstract: An electrical powered transmission tower is modified to also support a telecommunications antenna. The tower has a plurality of legs interconnected by lattice braces. A support column is erected within the enclosure of the tower. The support column has a base anchored in the ground on a concrete foundation. The column extends upward through the tower and protrudes through the top. The antenna is mounted to the upper end of the column. Fasteners secure the column to the tower for lateral support.

Abstract: The present invention is an improved Yagi-Uda style antenna. Primarily, the present invention provides that at least two driven elements are spaced approximately 0.1 .lambda. apart from each other. The driven elements are forced into a critical couple mode by electrically connecting the two driven elements with a matched phasing delay line. The phasing delay line retards the phase current sufficiently to, coupled with the specified element separation, satisfy both the endfire condition and the Hansen-Woodyard condition. This provides for increased directivity and gain, and deep nulls in the field strength. The at least two critically coupled elements compromise at least a first driven element, which is the primary broadcast element, and a second driven element, which is a driven reflector element. The reflector element acts to augment field strength in a direction toward the first driven element and reduce field strength in a direction away from the first driven element.

Abstract: A base station for communicating with at least one mobile station in a cellular communications system includes a plurality of receive antennas wherein each receive antenna is oriented to define a respective receive coverage area. The antennas are supported by a support structure so that a first receive antenna defines a first receive coverage area and a second receive antenna defines a second receive coverage area overlapping a portion of the first receive coverage area. First and second wideband receivers are operatively connected to respective first and second antennas. The first wideband receiver receives a first plurality of receive channels from the first receive coverage area, and the second wideband receiver receives a second plurality of receive channels from the second receive coverage area. The first and second pluralities of receive channels include at least one common receive channel.

Abstract: An antenna support for mounting one or more antenna on a support structure such as a tower. The antenna support includes a framework mountable to the structure, and an antenna mounting support assembly coupled to the framework. The antenna mounting support assembly is configured to mount the antenna in a fashion to be adjustable in a multitude of directions relative to the support structure, such that the mounted antenna may be tuned by an installer by adjustments in these directions.

Abstract: An HDTV broadcast transmission system and an analog NTSC broadcast transmission system are carried on the same tower and broadcast to the same area by adaptation of both systems: the NTSC system including: (a) a source of analog NTSC video signals, (b) an NTSC analog video signal exciter producing NTSC IF modulated analog video signals, (c) an NTSC frequency up converter and power amplifier producing NTSC RF modulated analog video signals (NTSC RF signals), (d) an NTSC broadcast antenna and (e) an all band VHF and UHF signal transmission line having an input end and an output end; the HDTV system including: (1) a source of digital video signals, (2) a digital video signal encoder producing IF modulated digital video signals and (3) a frequency up converter and power amplifier producing RF modulated digital video signals (HDTV RF signals) and an HDTV broadcast antenna; by combining the HDTV RF signals and NTSC RF signals at the input end of the transmission line and separating them at the output end and feedin

Abstract: A portable mount for a satellite dish antenna. The mount is comprised of a hollow base designed be to filled with liquid ballast. The top surface of the base contains an indentation for receiving an antenna support mounting bracket and a second, connected indentation for receiving an antenna support when not in use. When in use the base is filled with ballast material, the antenna support is rotated to a generally vertical position, and a satellite dish is attached. When in transport, the ballast is emptied, the satellite dish is removed, and the support is rotated into its indentation in the base. The base is generally rectangular, with a handle formed therein.

Abstract: An antenna for a land-based, mobile radio communication system, having a reduced size and shape, includes three, flat antenna dielectric panels, each covering one hundred, twenty degrees of azimuth. On each dielectric panel is formed two, interleaved microstrip antenna arrays having narrow vertical beam width. One of the antenna arrays receives signals and the other antenna array transmits signals. The receive array is circularly polarized. The panels are mounted in a triangular configuration about a central mast and a cylindrically shaped radome encloses the dielectric panels.

Abstract: A base station includes first and second antenna arrays for receiving first and second rotational polarizations, and a polarization diversity receiver connected to the first and second antenna arrays for processing respective first and second receive signals from a mobile station to generate an enhanced quality output receive signal based upon polarization diversity reception. Polarization isolation between the transmit and receive antenna elements may also provided by having a first plurality of transmit antenna elements for the second polarization mounted on a substrate carrying the first receive antenna elements. The second antenna array includes a second plurality of antenna elements of second polarization on a substrate carrying the second receive antenna elements.

Abstract: In an umbrella top-loaded monopole (UTLM) antenna, the charge distribution on top-load radials increases approximately linearly from the top of the antenna because the activated wires are separating from the tower and each other at the same time they are getting closer to ground. The UTLM antenna of the invention incorporates a top-load configuration in which top-load elements, whether they be radiating or receiving, are arranged in the shape of frames that originate at the top of the antenna and that extend away from the antenna towards the antenna's base where, at those points of the configuration furthest from the antenna tower and closest to ground at least two top-load elements converge to shield each other and hence reduce charge density. The top-load frames may be arranged contiguously such as in a rosette configuration. The self-shielding effect of the invention permits an antenna to operate at considerably higher voltage.

Abstract: The invention relates to a device at antenna systems for generating radio waves, including a supporting structure mounting at least one main radiator (3) for transmitting radio waves and where high frequency electric currents are generated in the supporting structure when the main radiator (3) is transmitting the radio waves. In order to improve the range of the main radiator (3) and at the same time reduce its backward radiation, the supporting structure includes a secondary radiator (14) for each main radiator (3). The secondary radiator (14) has at least one break portion (12) for interrupting or breaking the high frequency currents generated therein and through the thereby interrupted flow of the high frequency currents in the supporting structure reduce deviations from the desired range and/or direction of the radio waves transmitted by the main radiator (3).

Abstract: An electrical powered transmission tower is modified to also support a telecommunications antenna. The tower has a plurality of legs interconnected by lattice braces. A support column is erected within the enclosure of the tower. The support column has a base anchored in the ground on a concrete foundation. The column extends upward through the tower and protrudes through the top. The antenna is mounted to the upper end of the column. Fasteners secure the column to the tower for lateral support.

Abstract: An antenna for use in urban areas and the like, wherein the antenna is of a design that can be attached to the exterior corner of a building. The antenna is designed to be a low-profile configuration and conformal so as to maximize the aesthetic quality. The antenna also has a continuous backplane so as to create a radiation pattern that will allow substantially complete coverage of an intersection that is adjacent to the location of the antenna.

Abstract: A satellite dish is mounted on a bracket which in turn is mounted over an uneven surface of a roof or a wall of a house. The bracket has an elevated bridge portion for supporting a mounting foot of the satellite dish. The bridge portion is integrally connected to and supported by two narrow leg portions which in turn are integrally connected to and supported by two narrow foot portions. The bridge portion is elevated from two foot portions by the leg portions in order to clear the uneven surface of the roof or wall of the house.

Abstract: This invention is a lightweight, portable, quickly assembled, wide band, discone antenna for high frequency ground wave communication. The disk portion of the antenna is formed of telescoping spokes and the cone portion is formed of separate retractable wire elements. Disassembled, the antenna can be carried in a backpack. It can be assembled in less than ten minutes to achieve non-fading, non-line-of-sight communication.

Abstract: A method and multicoupler for a receiver at a base station in a cellular/PCS radio communication system includes a cooled container that is mounted on an antenna tower at the base station. The container is mounted on the antenna tower adjacent an antenna and contains thereinside a preselector filter, a highly linear amplifier, and a directional coupler that are cooled to a temperature less than 175.degree. K. and greater than 100.degree. K. A power splitter is connected between the output from the container and the radio system receiver, and is located at a ground station near the base of the antenna tower. Cooling the components inside the container, particularly the amplifier, to a temperature of about 150.degree. K. reduces the noise from the multicoupler so that base station range is extended, building penetration is improved, and subscriber transmit power may be reduced.

Abstract: In accordance with the present invention an antenna assembly is provided whereby a satellite dish antenna and a terrestrial antenna, for receiving satellite transmissions and local broadcast television signals, respectively, are mounted in the same location. A single base mounting bracket is used to mount the antenna assembly on a wall or other structure. The satellite antenna is secure to the base mounting bracket by a satellite antenna mast. An antenna interface bracket is also secured to the base mounting bracket. A terrestrial antenna mast, upon which a terrestrial antenna is mounted, is secured to the antenna interface bracket. The antenna interface bracket includes a central portion in the shape of an elongated parallelogram. At each end of the central portion of the antenna interface bracket are mounting ends which are attached at angles with respect to opposite faces of the central portion of the antenna interface bracket.

Abstract: A structure is disclosed, which has fiberglass components and which is useful for mounting an antenna at a communications site. The integrated structure comprises an upper, tubular pole, a lower, tubular pole, and a hollow cabinet having at least one door. The upper pole extends upwardly from the cabinet. The lower pole extends downwardly from the cabinet. Preferably, an integrated wall defines and encloses the upper and lower poles and the cabinet, except where the cabinet has at least one door. Alternatively, the upper pole is telescoped over a tubular flange extending upwardly from the cabinet and an integrated wall defines and encloses the lower pole and the cabinet, except where the cabinet has at least one door. In either instance, both poles communicate with the cabinet, and the cabinet has a rigid frame within such wall and a rigid floor within the frame.

Abstract: An antenna support consisting of a mast resting on a mast plate adjacent a building and including an adjustable length wall bracket secured to the building and bracketed to the mid-section of the mast, a guy arm secured to the mast and extending about 180.degree. from the wall bracket, a bowed guy wire connected from the antenna mast top through the guy arm to the mast plate, and two or more guy wires connected in spread array between the mast top and the adjacent building.

Abstract: A system for lowering and raising telecommunications equipment along a mast pole. The system comprises a mast pole, a platform means, a frame means, a plurality of lift cables, a hoisting means and a transition means. The platform means surrounds the external surface of the mast pole and is moveable along the length thereof. The platform means is arranged for mounting of telecommunications equipment thereon. The frame means is attached at the open upper end of the mast pole shaft and comprises pulley means, means for guiding at least one lift cable and means for guiding at least one telecommunications cable, i.e., signal cable or power cable. Each lift cable has a first end connected to the platform means and extends through the guiding means and through the passageway of the mast pole. The hoisting means is secured to the lower end of the mast pole and is provided for selectively raising and lowering the platform means. The pulley means includes a winch cable having a free end.

Abstract: Aircraft communications are established on a cellular system by having the transmission to aircraft directed above ground level so as not to interfere with ground cellular systems and having the transmissions from the aircraft at extreme low power levels so as not to interfere with transmissions from ground vehicles. The location of mobile stations either aircraft or ground vehicles for one embodiment is determined by Loran reception or other radio navigation system in the mobile station and transmitted to a mobile switching center to be used in transferring control from cell to cell by use of the determined location of the mobile station. For another embodiment the antennae for aircraft (both base station and mobile) are horizontally oriented while ground vehicle antennae (both base station and mobile) are vertical as in present commercial practice.

Abstract: A re-use partition of cells in a mobile communication system has an outer cell (30) and an inner cell (20) which is provided in the outer cell (30). An interval of cells using the same channel or the same frequency in the inner cells is shorter than an interval in the outer cells, which is the nature of a re-use partition. Communication between a base station and a mobile station is carried out by using a channel having a higher received level of an outer cell channel or an inner cell channel. A base station has a first beam tilt antenna having tilt angle (.THETA..sub.out) for an outer cell (30), and a second beam tilt antenna having tilt angle (.THETA..sub.in) so that .THETA..sub.in is larger than .THETA..sub.out. A speech channel and a control channel are provided for each of the first antenna and the second antenna.

Abstract: A base station includes a radio channel generating circuit for generating a plurality of individual radio channel signals each at a different frequency from one another, and a plurality of individual phased array antennas operatively connected to the radio channel generating circuit so that each individual phased array antenna transmits only one individual radio channel signal at a time. Each of the phased array antennas preferably includes a substrate and a plurality of radiating elements mounted thereon in a predetermined pattern. Each radiating element is readily provided by a stripline, and the substrate is preferably a circuit board. Accordingly, another feature of the base station according to the invention is that power radiated by each phased array antenna can be selectively controlled to reduce possible interference while maintaining communications with respective mobile units that are both near and far from the base station.

Abstract: A non-imaging antenna system for the Instrument Landing System (ILS) utilizes a spatial filter network to provide a glideslope beam at a positive angle, while providing a null effect at a corresponding negative angle to reduce energy reflection at the glideslope angle. Four radiating elements, each including dipoles and a corner reflector, can be used as two overlapping vertical arrays of three elements each. A magic-T input junction is used to provide sum and difference glideslope beam signals to the overlapping arrays. The radiated signals of the two overlapping arrays provide aircraft guidance signals enabling an approaching aircraft to derive indications of high or low departures from the desired glide path. The array apertures may also be tilted from vertical to avoid coning effects of prior ILS antennas. Guidance signals compatible with the current ILS are provided, while avoiding site limitations, snow cover and other operating deficiencies of prior ILS antennas.

Abstract: An adjustable antenna mount that includes one or more support arms extending outward from a central tower or mast, with each support arm supporting a pivoting cross member on which an antenna assembly is mounted. Each antenna assembly is pivotable about the cross member, and the ends of the cross member and hence the antennas can be accessed from the relative safety of the mast by swiveling the ends of the cross member to a position near the mast. The present invention not only enables the rotation and angle of each antenna to be fine tuned, but also dispenses with the need for a convention work platform at the top of the mast. As such, the present invention presents a much lower wind profile, thereby enhancing signal quality by preventing oscillation of the support in certain high wind conditions.

Abstract: A broadcast antenna that generates circularly polarized waves and comprises a pair of conducting arms having portions forming a normal mode helix with one arm interrupted by an insulator to permit the connection of an internal feed line.

Abstract: A dual frequency batwing antenna includes a larger batwing with smaller UHF batwings located in substantially the same plane but within a vacant space provided by the larger batwing. The smaller batwings are also co-linear so there is no inductive coupling. Thus a pair of radio frequency signals are radiated from a common aperture.

Abstract: A tubular mast has a tubular boom detachably mounted thereon, and a plurality of tubular antenna elements are detachably mounted on the boom. An elastic cord is disposed within and is connected to the boom. A further elastic cord is disposed within and is connected to the mast. Additional elastic cords are disposed within and are connected to the antenna elements. The elastic cords disposed within the mast and the antenna elements are slidably connected to the cord portion disposed within the boom. The elastic cords maintain the components in operative position and allow the components to be detached from one another to fold the antenna into collapsed position.

Abstract: An antenna mounting platform for mounting at selectable positions along the length of a monopole tower comprises a frame having an interior opening for receiving the monopole, a bracket mounted to the frame and extending to the interior opening and means for selectively (1) forcing the bracket against the monopole and holding the mounting platform on a location on the monopole, and alternatively, (2) releasing the bracket from against the monopole so that the mounting platform is movable along the length of the monopole. Desirably, the antenna mounting platform comprises a plurality of connecting members corresponding to the number of brackets for connecting the brackets. Each connecting member connects adjacent brackets and is operable to selectively compress associated first and second outriggers together and thereby force the brackets against the monopole, and alternatively, decompress the associated first and second outriggers and thereby release the brackets from against the monopole.

Abstract: An antenna of special form--to wit: a tube and more precisely a tubular dipole--is positioned inside an electrically non-conducting tubular post, typically made of fiberglass, that serves to support an electronic device, typically an irrigation controller, that communicates both by wire and by radio. Wired connection is via wires that are channeled and contained, preferably axially centrally tightly, within the tubular support post. The wires are substantially at radio frequency ground, and serve to connect the irrigation controller to one or more remote electrical devices such as soil moisture sensors and electric valves. The tubular dipole antenna is preferably formed as a fiberglass tube having a conducting exterior surface, normally made of metal and preferably copper, that is divided equally into two tubular segments.

Abstract: Directional antennae on aircraft and on cellular telephone base stations, having a polarity opposite that of potentially interfering ground system signals, minimize signal strength of air cellular signals received by ground cellular stations. Aircraft directional antennae comprise patch antennae or vertical arrays of loop elements or vertical arrays of virtual loop elements. Additionally, air cellular signals are switched to channels not currently in use by ground cellular systems.

Abstract: A dual frequency slot type antenna with slots providing donut-type radiating patterns on a verticals mast at a first frequency and having a null area between the vertically located slots where an additional collar is placed to provide for the transmission of a second frequency which is generally of the same UHF range as the first.