37 results about "Biconical antenna" patented technology

A biconical antenna for wireless communications includes a conical upper conductive body and a conical lower conductive body having a common apex, which is used as a power feed point, wherein a space between the conical upper and lower conductive bodies is filled with a dielectric material such that a shortest distance connecting the conical upper and lower conductive bodies along a surface of the dielectric material is a curve at which an incident angle of an incident wave incident on the surface of the dielectric material through the dielectric material from the common apex is a Brewster angle over the entire surface of the dielectric material.

The invention discloses a passive direction-finder antenna array of a phase interferometer and the phase interferometer. The passive direction-finder antenna array comprises three layers from inside to outside. The first layer is a circular antenna array composed of a plurality of dual-polarization omnidirectional antenna array elements which are arranged on a circumference, each dual-polarization omnidirectional antenna array element comprises a horizontal polarization oscillator and a perpendicular polarization oscillator and is connected with one-out-multiple antenna switch through a polarization choice output matching board, and the horizontal polarization oscillators and the perpendicular polarization oscillators on the circumference are adjacently arranged; the second layer is a horizontal polarization antenna array which comprises a horizontal polarization annular oscillator; the third layer is a perpendicular polarization antenna array which comprises a perpendicular polarization biconical antenna oscillator and two cones in the perpendicular polarization biconical antenna oscillator are respectively connected with a matching circuit; the horizontal polarization antenna array of the second layer and the perpendicular polarization antenna array of the third layer are connected with the input ends of the same one-out-two antenna switch. The passive direction-finder antenna array has the advantages of being simple in structure, low in production cost, high in testing sensitivity and high in accuracy.

Systems and devices relating to a biconical antenna. The antenna has a top cone assembly and a bottom cone assembly, each cone assembly being coupled to a dielectric spacer at its apex. Each cone assembly has a cone section and a truncated cone section. The cone section is a cone with an apex which forms the apex of the cone assembly. The truncated cone section is coupled to the cone of the cone section at the cone's rim. The cone has an opening angle which is larger than the opening angle of the truncated cone. The biconical antenna can be fed by way of a coaxial cable with the outer cable feeding the bottom cone assembly and the inner cable feeding the top cone assembly.

A biconical antenna according to the present invention includes a columnar dielectric member having frustum-shaped cavities extending respectively from an upper surface and a lower surface toward a center of the columnar dielectric member, wherein flat surfaces of apex portions of the frustum-shaped cavities are parallel and in opposition to one another; a frustum-shaped feeder portion made of a conductive film provided on an inner surface of the upper cavity; and a frustum-shaped ground portion made of a conductive film provided on an inner surface of the lower cavity. The present invention realizes a more compact biconical antenna by filling the dielectric member between the feeder portion and the ground portion of the biconical antenna.

The invention discloses a method and a device for measuring electromagnetic emission characteristics of an electronic device on site, comprising steps of environment field intensity test, radiation emission test, conduction emission test, and fault diagnosis test. The environment field intensity test includes the step of performing the test on the electromagnetic environment of the device working site to determine the environment permanent signal and whether newly increased abnormal signals exist; the radiation emission test comprises steps of testing the radiation emission in the frequency range from 10kHz to 3GHz through a portable biconical antenna, performing processing on test data through an environment rejecting algorithm and obtaining practical electromagnetic emission characteristics of a tested device; the conduction emission test includes steps of testing the conduction emission in the frequency range of 25Hz to 10MHz through a current caliper and testing the coupling between lines in the frequency range of the 25Hz to 250MHz; the fault diagnosis test includes steps of respectively choosing near-field probes with various precision according to the electromagnetic emission characteristics of the tested device,and further determining the electromagnetic emission characteristics of a particular part. The method disclosed by the invention also comprises a step of performing correlation calculation on the on-site test data abnormal frequency band and other device templates to obtain the results of the on-site test and the fault diagnosis.

A biconical antenna; an entry conic having an entry base opposite an entry vertex and a termination conic having a termination base opposite a termination vertex. The entry and termination conics share substantially the same axis and the entry vertex is adjacent the termination vertex. The transmission line is received by the entry conic and terminated in the termination conic. Together, the entry conic and the termination conic phase correct energy emanating from the transmission line. Another embodiment of the antenna comprises an entry conic having at least two sub-conics and a termination conic having at least two sub-conics. Each of the sub-conics having an integer multiple of a half-angle. The biconical antenna may also include a multi-conductor transmission line, wherein the biconical antennas are arranged in a co-linear relationship. Each of the multi-conductors is coupled to at least one of the plurality of biconical antennas.

A biconical antenna driven by an equal-delay transformer is provided herein with a bifurcating ground plane. According to one embodiment, the biconical antenna comprises a pair of cone-shaped elements and a conducting ground plate. The cone-shaped elements are arranged back-to-back to one another and aligned along a first axis. The conducting ground plate is arranged between the cone-shaped elements in a plane perpendicular to the first axis. As described herein, the bifurcating ground plane provides the decoupling needed to eliminate the anomalous undulations, which tend to occur in the antenna response at odd-integer average quarter-wave frequencies.

An biconical antenna assembly including a pair of conductors each having a plurality of radiating conductors. One of the conductors defines a cone shape and radiating conductors extending to define a generally conical form. The other conductor defines a cylindrical shape and radiating conductors extend to define another generally conical form. The conical forms are defined by a pair of sheet conductors and radiating conductors generally divergent about a center point or axis. A feed point is defined generally at the center point. Multiple RF chokes can be provided on the radiating conductors to optimize performance of the antenna over a predetermined frequency range.

A wide band biconical antenna with a helical feed system comprises a printed circuit board (PCB) that maintains a plurality of antenna elements having an entry conic and a termination conic arranged about a common axis. Each of the antenna elements receive a signal from a signal splitter via respective feed lines that each have the same physical length. In addition, the antenna system includes a matching system disposed within the ground plane formed by the entry conic of each of the antenna elements. The antenna elements are retained within retention sections that maintain helical support channels that allow the feed lines to be arranged in a helical manner about the antenna elements.

A wideband biconical antenna arrangement is disclosed having a feed arrangement that services a second antenna positioned above the biconical antenna. The feed for the second antenna is configured as a helix that spirals around an outer periphery of the upper and lower cones of the biconical antenna along the biconical antenna's cylindrical radiating aperture. In one embodiment, the feed is a coaxial cable disposed within a hollow metal tube. This helix feed does not substantially degrade the performance of the wideband biconical antenna. The wideband biconical antenna has its feed disposed within a central conduit of the biconical antenna. The biconical antenna has at least one octave of bandwidth, and in one embodiment the second antenna also has at least one octave of bandwidth.

The invention provides an ultrahigh-frequency asymmetric biconical antenna for transformer station partial discharge full-station detection. The ultrahigh-frequency asymmetric biconical antenna comprises an upper round table, a lower round table, an upper cylinder and a lower cylinder, wherein the top end of the upper round table and the top end of the lower round table are opposite and are spaced by a gap; the upper cylinder is connected with the upper end surface of the upper round table; the lower cylinder is connected with the lower end surface of the lower round table; and the radius of the upper end surface of the upper round table is smaller than the radius of the lower end surface of the lower round table. The antenna has a work bandwidth of 470MHz to 3GHz, an H-surface directional diagram presents an omnidirectional feature, an E-surface directional diagram presents a cake ring shape in a low frequency range and presents a heart shape in a medium-high frequency range, "upwarping" of directional diagram gain is realized, gain of the antenna in an elevation angel interval of 0 to 60 degrees of a vertical surface is increased, and partial discharge signals of a transformation station can be better received.

The invention discloses an improved biconical antenna for UHF waveband passive radar. The antenna comprises an upper radiation arm, a lower radiation arm and a feed structure, wherein the upper radiation arm and the lower radiation arm are symmetrically and coaxially arranged and connected into a whole, a first cylindrical vibrator and a first conical vibrator are connected to form the upper radiation arm, a second conical vibrator and a second cylindrical vibrator are connected to form the lower radiation arm, the diameter of the top surface of each conical vibrator is equal to the diameter of each cylindrical vibrator, the first conical vibrator and the second conical vibrator are symmetrically arranged in the mode that conical tips are opposite, and the first conical vibrator and the second conical vibrator are not in contact; the feed structure is composed of an SMA-K type connector and a 1:1 balun, the SMA-K type connector is arranged on the internal conical tip portion of the second conical vibrator, the balun is arranged between the first conical vibrator and the second conical vibrator, the SMA-K type connector is connected with the input end of the balun, and the output end of the balun is connected with the upper radiation arm and the lower radiation arm of the biconical antenna. According to the improved biconical antenna, directional diagram consistency is higher on the working band, the size is smaller, and the antenna is convenient to carry.

A biconical antenna includes an entry conic having an entry base opposite an entry vertex and a termination conic having a termination base opposite a termination vertex. The entry and termination conics share substantially the same axis and the entry vertex is adjacent the termination vertex. The transmission line is received by the entry conic and terminated in the termination conic. Together, the entry conic and the termination conic phase correct energy emanating from the transmission line. Another embodiment of the antenna comprises an entry conic having at least two sub-conics and a termination conic having at least two sub-conics. Each of the sub-conics having an integer multiple of a half-angle. The biconical antenna may also include a multi-conductor transmission line, wherein the biconical antennas are arranged in a co-linear relationship. Each of the multi-conductors is coupled to at least one of the plurality of biconical antennas. The biconical antennas may also be constructed on a circuit board substrate.

The invention relates to a biconical antenna, which is characterized in composed of a dielectric element provided with cavities in cone shapes at upper and lower faces of a cylinder body, respectively towards to the center of the cylinder body, while the top planes of the cavities are parallel and opposite with each other, a power supplier in cone shape composed of a conductive membrane on the inner surface of the upper cavity, and an earth portion in cone shape composed of a conductive membrane on the inner surface of the lower cavity. The invention fills the dielectric element between the power supplier and the earth portion to realize the miniaturization of biconical antenna.

The invention provides an omnidirectional antenna array comprising a first biconical antenna unit, a second biconical antenna unit, and feed networks. The biconical antenna unit is used for receiving or transmitting a first high-frequency signal; the second biconical antenna unit stacked at the first biconical antenna unit is used for receiving or transmitting a second high-frequency signal having the same amplitude and phase as the first high-frequency signal; and the feed networks embedded in the first biconical antenna unit and the second biconical antenna unit are used for distributing high-frequency signals into a first high-frequency signal and a second high-frequency signal and transmitting the first high-frequency signal and the second high-frequency signal out or synthesizing the high-frequency signal and the second high-frequency signal into a high-frequency signal and receiving the high-frequency signal. The omnidirectional antenna array is applied to a Ka band or a higher band and a horizontal omnidirectional gain of over 10dBi is obtained.

The invention relates to an ultra wide band symmetric biconical antenna, in particular relates to an ultra wide band symmetric biconical antenna with a compound curve as a bus, which aims to solve the problem that the size and the weight of a biconical antenna cannot give consideration to both the high-frequency characters and the low-frequency characters. The ultra wide band symmetric biconical antenna comprises two frustum bodies, wherein the two frustum bodies are in a shape of a hourglass from top to bottom, each frustum body consists of a first frustum body with a binomial curve as a bus and a second frustum body with a straight line as a bus, and the top surface of the first frustum body and the bottom surface of the second frustum body are connected to form a whole body. The ultra wide band symmetric biconical antenna is used for the field of wireless communication.

The invention discloses a 4G indoor ceiling-mounted gain antenna. The 4G indoor ceiling-mounted gain antenna includes an antenna cover and a bottom plate. A biconical antenna and a microstrip round plate antenna are mounted in a space defined by the antenna cover and the bottom plate. The biconical antenna is composed of an upper cone and a lower cone. The upper cone and the lower cone are connected to each other through a connection nut and a plastic sleeve cap, so that vertical wave radiation is formed. The microstrip round plate antenna includes a two-layer PCB substrate made of F4B material. The PCB substrate is supported between the upper cone and the lower cone by a plurality of supporting rod. The front face of the PCB is provided with a plurality of hook-shaped copper-coated parts connected together and forming an enclosed area. The back face of the PCB is provided with a plurality of T-shaped copper-coated parts connected together and forming an enclosed area. Therefore, horizontal wave radiation is formed. By adopting the above design, standing-wave ratio of the antenna can be reduced, antenna performance can be improved effectively and antenna pattern non-roundness can be reduced.

The present invention discloses a VHF-UHF band wideband omnidirectional receiving antenna which comprises a first structure and a second structure which are arranged vertically symmetrically. The first structure comprises a first round-table-shaped vibrator, a second cone-shaped vibrator, and a plurality of connection rods. The second structure comprises a second round-table-shaped vibrator, a first cone-shaped vibrator, and a plurality of connection rods. The first round-table-shaped vibrator is connected to the second cone-shaped vibrator through the connecting rods. The second round-table-shaped vibrator is connected to the first cone-shaped vibrator through the connecting rods. The first cone-shaped vibrator and the second cone-shaped vibrator are arranged coaxially according to the mode of opposite cones. The first round-table-shaped vibrator and the first cone-shaped vibrator are at the same side of an antenna feed point, and the second cone-shaped vibrator and the second round-table-shaped vibrator are at the other side of the antenna feed point. Compared with a traditional biconical antenna, the working band is wider, the number of impedance bandwidths with VSWR smaller than 2.3 is larger than four, a horizontal omnidirectional directional diagram is provided, the size of the antenna is small, and the antenna is convenient to carry.

The invention discloses a double-frequency ultra-broadband omni-directional antenna. The double-frequency ultra-broadband omni-directional antenna comprises a biconical antenna unit and a sleeve antenna unit which are sequentially arranged from bottom to top; the biconical antenna unit comprises two cylinder-cone combinations which are sequentially arranged from bottom to top, each cylinder-cone combination comprises a cylinder and a cone which are integrated, and the cylinders and the cones are both hollow; the vertexes of the cones in the two cylinder-cone combinations are arranged oppositely and separately, the lower cylinder-cone combination is arranged on a bottom plate, and the upper cylinder-cone combination is fixed to an antenna housing through an isolated first fixing mechanism;the sleeve antenna unit comprises a hollow sleeve, an oscillator is arranged a center shaft of the sleeve, the vibrator and the sleeve are not electrically connected, and the sleeve antenna unit is fixed to the antenna housing through an isolated second fixing mechanism or mounted on the biconical antenna unit through an isolated supporting mechanism; and the antenna further comprises a feed structure for feeding the biconical antenna unit and the sleeve antenna unit. The ultra broadband and good omni-directivity can be achieved.

The invention discloses a detection device of radiation emission intensity of a line board structure and a detection analysis method. The detection device comprises a test desk (4) arranged in a semi-electric wave dark room. A metal plate (6) is laid on the test desk (4). A single cable (7) is horizontally arranged on the test desk (4). A starting end port of the cable (7) is connected with a port 1 of a network analyzer (8). A terminal port of the cable (7) is connected with the metal plate (6) through a short circuited line (9). The cable (7) and the metal plate (6) form a line board structure. A biconical antenna (10) receives radiation of the line board structure. The output port of the biconical antenna (10) directly outputs a transmission coefficient or is connected with the port 2 of the network analyzer (8). According to the invention, the detection device is simple in structure and the measurement results are real and accurate.

An antenna assembly having a pair of generally cone-shaped conductive elements directed in divergent directions, with each pair of conductive elements including a conical sheet conductor and a cylindrical sheet conductor, and radiating wire conductors extending away from each cylindrical sheet conductor. A balun feed system is defined between the pair of conical sheet conductors. A radome assembly protects at least the radiating wire conductors from damage from external forces.

The invention relates to an implementation method of a high-gain omnidirectional biconical antenna array. The implementation method is mainly used for improving the omnidirectional degree of an omnidirectional antenna in a broadband range and acquiring a pitching wave beam with good in-band consistency at the same time. The high-gain omnidirectional biconical antenna array is composed of a plurality of cylindrical loading special-shaped sleeve biconical antenna units arrayed by pitching surfaces and an array feeder, wherein the top of a cone of each sleeve biconical antenna unit is provided with a cylindrical load so as to improve an in-band voltage standing wave ratio; each array unit is directly excited through a coaxial line, an inner conductor of the coaxial line is connected with an upper half cone of the unit, and an outer conductor is connected with a lower half cone; one upper biconical antenna feed coaxial line passes through the inner conductor of one lower unit feed coaxial line in sequence to form a nested coaxial line, and feed structures do not interfere with each other; and the nested coaxial line is converted into an independent feed connector through a coaxial ridge waveguide conversion pair below the coaxial line. The method is suitable for design and implementation of the high-gain omnidirectional biconical antenna array.

The embodiment of the invention discloses a biconical antenna unit structure. The biconical antenna unit structure comprises a U-shaped bracket; an upper radiation arm which is combined and fixed on the edge of the side wall of the U-shaped bracket; a lower radiation arm which is combined and fixed on the edge of the other side wall of the U-shaped bracket and is arranged corresponding to the upper radiation arm, wherein both the upper radiation arm and the lower radiation arm are conical, and the upper radiation arm and the lower radiation arm are symmetrically arranged; a feed needle seat which is positioned between the upper radiation arm and the lower radiation arm and is combined and fixed at the conical tip of the upper radiation arm; a radio frequency coaxial connector which is combined and fixed on one side, far away from the upper radiation arm, of the lower radiation arm; and a pin rod which penetrates through the lower radiation arm and is communicated with the feed pin seat and the radio frequency coaxial connector. Through weight reduction processing of the support, the upper radiation arm and the lower radiation arm and use of the supporting columns and the supporting plates, the structural rigidity of the antenna unit structure is effectively improved, and the antenna unit structure has the advantages of being simple in structure, good in rigidity, easy to machine and the like.

The invention provides an antenna device and a use method thereof. The antenna device comprises a first antenna unit radiation arm, a second antenna unit radiation arm and a feed structure, the feed structure comprises a first feed connecting piece and a second feed connecting piece, and the first feed connecting piece and the second feed connecting piece can feed electric energy into the first antenna unit radiation arm and the second antenna unit radiation arm. A strip-shaped gap is formed between the first antenna unit radiation arm and the second antenna unit radiation arm close to each other. The antenna device provided by the invention has the advantages that the structure is simple, the realization and the application are easy, the insulation between the unit radiation arms at the two sides is ensured while the electric connection is ensured through the design of the feed structure, and the reliability of the antenna device is improved. The antenna device has good electromagnetic radiation characteristics in an ultra-wide frequency band, solves the problem that the radiation characteristics of a traditional planar biconical antenna are deteriorated when the traditional planar biconical antenna works at high frequency, and has the advantages of low requirement on antenna processing precision, simplicity in assembly and stable performance.