49 results about "Discone antenna" patented technology

An imaging millimeter wave radar system. The system includes a millimeter wave transmitter transmitting a frequency scanned millimeter beam that is narrow in the scanned direction and wide in a direction perpendicular to the scanned direction. The system includes a receive antenna and a Rotman type lens for forming a one-dimensional image in the perpendicular direction of targets in the antennas field of view based on millimeter wave radiation reflected from the targets. A computer creates a two dimensional image based on the scanning direction of the transmit beam of the transmit antenna and the one dimensional image from the receive antenna. Distance to the target is determined based on difference in frequency of the transmit signal and the receive signal. Thus, a three dimensional view of the systems field of view is determined by the system. This view can be displayed on a monitor using color to represent target distance. In a preferred embodiment the scanned direction is the vertical direction and the receive antenna forms a horizontal image from signals reflected from targets in the field of view. In this preferred embodiment the transmit antenna is a variable frequency millimeter wave single channel wave guide antenna operating in the 78 GHz to 81 Ghz spectral range to produce a scanning range of 10 degrees and a scanning rate of 60 Hz. The receive antenna is a multi-channel (176 channels) strip-line antenna also operating in the 78 GHz to 81 GHz spectral range, which with the Rotman lens, provides 192 horizontal pixel resolution.

The discone antenna includes a conical antenna element, having an apex, and a disc antenna element adjacent the apex of the conical antenna element. An inverted antenna feed structure, such as a flanged coaxial connector or coaxial cable, is connected to the disc and conical antenna elements and extends outwardly from the disc antenna element on a side thereof opposite the apex of the conical antenna element. The discone antenna with such an inverted feed structure facilitates an inverted positioning, for example, on vehicles, rooftops and / or control towers, etc., that will increase the bandwidth pattern in the direction of the potential target.

An antenna assembly has a pair of disk-shaped antennae each tuned to a different frequency band thereby enabling the same antenna to be used to different types of communication equipment, such as cellular and PCS telephones. The first antenna has a first substrate with first and second conductive layers applied to its major surfaces, and the second antenna has a second substrate with third and fourth conductive layers applied to its major surfaces. A primary shunt extends between the first and second conductive layers to tune the first antenna, and a secondary shunt extends between the third and fourth conductive layers to tune the second antenna. The first and second antennae abut with the first conductive layer contacting the fourth conductive layer. A pair of electrical conductors are connected to different ones of the second and third conductive layers to carry communication signals to the antenna assembly.

An apparatus includes a discone antenna including a cone-shaped element whose physical shape is at least partially defined by at least one pleat.

Wideband antennas with omnidirectional coverage have both military and commercial applications. In one embodiment, the Planar Inverted Cone Antenna (PICA) is composed of a single flat element vertically mounted above a ground plane. A geometry of Planar Inverted Cone Antenna (PICA) is based on the conventional circular-disc antenna with trimmed top part having the shape of a planar-inverted cone, in a second embodiment, the Fourpoint antenna also provides balanced impedance over the operating band and has useful radiation patterns and dual polarization over its operating frequency.

The present invention is to provide a disk-shaped antenna comprising a ring-shaped metal loop and a ground metal face respectively on top and bottom of a substrate, wherein a center hole is provided in each of the substrate and the ground metal face, a central conductor of a coaxial is inserted through the holes and connected to at least one rotatable metal band on the top of the substrate, two ends of the metal band are adapted to contact the metal loop, and braided outside conductor of the coaxial contacts the ground metal face. Thus, an angle between two metal bands is adapted to change by rotating one about the other for adjusting current loop and potential difference in an electric field perpendicular to the plane of the metal loop, thereby controlling the spiral of electromagnetic wave transmitted from the disk-shaped antenna.

The discone antenna includes a conical antenna element, having an apex, and a disc antenna element adjacent the apex of the conical antenna element. An inverted antenna feed structure, such as a flanged coaxial connector or coaxial cable, is connected to the disc and conical antenna elements and extends outwardly from the disc antenna element on a side thereof opposite the apex of the conical antenna element. The discone antenna with such an inverted feed structure facilitates an inverted positioning, for example, on vehicles, rooftops and / or control towers, etc., that will increase the bandwidth pattern in the direction of the potential target.

A collapsible discone antenna is provided with an ultra wide band width by providing a collapsible conical skeleton cone, with the rods of the skeleton being provided with meander lines so as to effectively reduce the overall dimensions of the antenna by a factor of 2, with the antenna rods being electrically interconnected at their distal ends so as to eliminate performance degradation due to varying ground conductivities. A specialized feed configuration is used in one embodiment to feed multiple antennas stacked above a low band disc through the utilization of one or more coaxial lines which are wrapped around a ferrite toroid so that they may be passed up through the low-band disc without detuning the low band discone antenna. The use of the toroid inductor between the low-band cone and the low-band disc further reduces the low frequency cutoff of the antenna by markedly decreasing the VSWR at frequencies as low as 20 megahertz.

An antenna device forms a discone antenna and comprises a pole-shaped base member 10a composed of dielectric material. The pole-shaped base member 10a has a cone-shaped inner space formed therein. In an inside surface of the pole-shaped base member 10a, a first antenna element 11 is formed by patterning a metal conductor layer. Further, on a plain surface facing the outside of the pole-shaped base member 10a, a second antenna element 12 is formed also by circularly patterning a metal conductor layer at the side of a top of the first antenna element 11 with a predetermined space being kept between the top of the first antenna element 11 and the second antenna element 12. The first antenna element 11 and the second antenna element 12 are located with respective rotation central axes thereof being corresponding with each other.

An antenna system, particularly for vehicles. A discone-type antenna is preferably utilized for frequencies outside the vehicle. At various frequencies, either or both the antenna and the vehicle serve as exciters.

An antenna (and concomitant method of making and communications method) comprising a conical radiating element and a circular radiating element surrounding a base of the conical radiating element.

The invention discloses a microstrip array discone composite conformal antenna and aims at providing a composite antenna which is low in profile and easy to conform to a carrier. The antenna is realized through the following technical scheme. The technical scheme comprises the following steps that 1, a metal cone and a metal disc which are fixed on a cavity bottom of a reflection cavity are embedded to form a discone antenna; at least 2*2 rectangular radiation patch units are arranged on the dielectric substrate fixedly connected to the metal disc; the rectangular radiation patch units are connected in parallel and feed through one-in-four microstrip power divider; and the discone antenna and the microstrip array antenna form a composite antenna array which can radiate horizontal omnidirectional L-frequency band vertical polarization signals and can directionally radiate C-frequency band horizontal polarization signals to a zenith. A voltage standing wave ratio VSWR of the composite antenna is smaller than or equal to 2, and an isolation degree S21 of two ports is larger than or equal to 30 dB. The antenna has a multi-frequency broadband characteristic, and can meet requirements ofgain and airspace coverage required by an airborne platform L-band data link function and a radio altimeter function.

Provided is an antenna simply manufactured according to a frequency characteristic. The disk-shaped antenna having a screw tap structure includes a center post having a screw tap, a ground plane, and a disk radiator, so that a distance between a ground plane and a disk radiator can be finely tuned, and manufacturing and assembly error can be reduced to minimize differences in electrical characteristics between devices.

The invention discloses a microstrip antenna. The microstrip antenna comprises a substrate, a reference stratum disposed at the back surface of the substrate, and folding antenna dipole arrays disposed at the front surface of the substrate. The folding antenna dipole arrays comprise: a first antenna array and a second antenna array which are connected in series for feeding through an inter-array impedance transformation line, wherein the first antenna array comprises a first folding dipole and a first impedance transformation line connected with the first folding dipole; the second antenna comprises a second folding dipole and a second impedance transformation line connected with the second folding dipole; the second impedance transformation line is connected with the inter-array impedance transformation line, and the first impedance transformation line is connected with the inter-array impedance transformation line; and the end, which is back from the second antenna array, of the first impedance transformation line is connected with a first feed microstrip line. According to the invention, the two folding antenna dipole arrays connected in series for feeding are employed, such that the antenna width is reduced, the gain of the antenna is improved, omnidirectional performance of the antenna is maintained, and the obtained standing wave bandwidth is quite wide.

The invention provides a multi-band broadband tapered slot-line antenna. The multi-band broadband tapered slot-line antenna is used for solving the technical problems that the requirements for the high gain and the broadband of an antenna in antenna applications of remote sensing, detection, communication, radar, a testing and simulating system and the like can not be met. According to the multi-band broadband tapered slot-line antenna, a high-band center antenna part of a slot line structure and a low-band periphery antenna part of a dual-slot-line radiation structure form a whole, and therefore the band width of the antenna is increased. The invention further provides an orthorhombic dual-polarization broadband tapered slot-line antenna. The two multi-band broadband tapered slot-line antennas are subjected to orthogonal collocation with the method that grooves are formed in the axes of the dual-slot-line radiation structures, limitation caused by the thickness of a dielectric substrate when a single-slot-line transmission section slot-line antenna is subjected to dual-polarization design is avoided, the influence of the small distance between two polarization single-slot-line transmission sections on the radiation characteristic of the antenna is avoided, and the technical problems that the requirements of the high gain, the broadband and dual polarization of the antenna in antenna applications of remote sensing, detection, communication, radar, the simulation testing system and the like can not be met are solved.

A collapsible indoor television antenna assembly includes a base, a VHF antenna set and a UHF antenna. The base has a top, a top recess and an annular rib with a pivot slot formed on the top of the base to define the top recess. The UHF antenna includes a pivot assembly and a disk antenna. The pivot assembly is mounted in the pivot slot. The disk antenna is collapsible, is rotatably mounted on the pivot assembly and is received in the top recess. The VHF antenna set includes two connection rods and two collapsible dipole antennas. The connection rods are retractably and rotatably mounted in the base. The dipole antennas are pivotally connected to the connection rods and are retracted into the base. Consequently, the foldable UHF and VHF antennas make the entire indoor television antenna assembly compact to save packaging materials and storage space.

The invention discloses an ultrashort wave folding type discone antenna which comprises a telescopic component, a core rod, a top control disk, a sliding shaft, a flange casing, a main supporting pipe, a vertical-polarization conductor casing, a lower connecting disk, an upper connecting disk, eight horizontal-polarization long oscillators, eight horizontal-polarization short oscillators, eight oblique-polarization antenna vibrators and a signal processing circuit module. Under the mode that the operating frequency range of ultrashort waves is met, the range of operating frequency range of the antenna is expanded furthest to 20-3600MHz, and the signal receiving sensitivity is improved. The structure size of the antenna is reduced furthest, the weight is decreased, the size is reduced, and the force distribution of the whole cylindrical antenna structure is improved.

The discone antenna is a small communication antenna with broad voltage standing wave ratio (VSWR) bandwidth. The discone antenna includes a conical antenna element and a disc antenna element adjacent the apex thereof and including a proximal electrically conductive planar member and a spaced apart distal electrically conductive planar member being electrically connected together at respective peripheries thereof defining a folded ground plane. An antenna feed structure is coupled to the disc and conical antenna elements and includes a first conductor coupled to the proximal electrically conductive planar member, and a second conductor coupled to the conical antenna element and to the distal electrically conductive planar member. An impedance element, such as a resistor, may be connected between the second conductor and the distal electrically conductive planar member.

The present invention provides a single-polarization directional antenna / array directional antenna and its tdd communication system. The angle of the polarization direction of the single-polarization directional antenna and the vertical direction is the sum of 45-degree and the preset value. In one tdd communication system of the single-polarization directional antenna / array directional antenna, the angle of the polarization direction of the antenna and the vertical direction is the sum of the 45-degree and the preset value, the angle of the second antenna which direction is fully opposite to the first antenna and the polarization direction of the first antenna in the first antenna positive cover range is 90-degree; the antenna of the system is a single-polarization directional antenna / array directional antenna. The polarization direction of the receiving antenna and the emitting antenna generating interference signal differs by 90-degree or closes to 90-degree, the orthogonal polarization inhibition is formed, greatly reducing the interference.

A wireless apparatus capable of controlling radiation patterns and directions of antenna is provided. It comprises an antenna element, a ground plane, an antenna feed-point, and at least one slot or slit formed on the ground plane. The inclusion of such slots or slits in the wireless apparatus improves the radiation directivity of antenna, and greatly enhances the antenna gain on the horizontal plane. It also resolves the problems caused by shift of radiation patterns of antenna and the poor antenna gains for a conventional antenna apparatus. The wireless apparatus of the present invention has the advantages of simple structure and easy fabrication. The invention can be applied to various kinds of antennas, such as monopole antenna, shorted-monopole antenna, dipole antenna, loop antenna, and planar inverted-F antenna, etc.

The invention relates to a high-power discone antenna. A disk-shaped structure is arranged between two conical oscillators. Discharge electrodes are arranged in the center of the disk-shaped structure and tightly cooperate with the disk-shaped structure. Opposite parts of the two discharge electrodes are hemispherical structures. By a high-voltage gas switch structure at an excitation end of the high-power discone antenna to sharpen input voltage pulse, the sharpened voltage pulse excites the discone antenna to operate and radiates outwards high-power electromagnetic pulse. By integrating dual functions of sharpening pulse and enhancing radiation energy, the high-power wide-spectrum discone antenna has excellent radiation performance, and design space of a sharpening switch is saved in the design of a high-power wide-spectrum system. The antenna is convenient to use, is safe, has low experimental cost and is simple to debug. The antenna can actually be applied in fields of various high-power electromagnetic pulse researches and the like, and can be used as an electromagnetic pulse radiator of a system.

A low-visibility, fixed-tune, wideband, and field-diverse antenna provides cross-polarized fields enhancing signal communications but having helical antenna characteristics without severe circular polarization radiation thereby promoting a modern, futuristic, and disguised look for reliable communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core substrate, pitch or angle of the helix, length of the transmitting antenna, and copper traces thickness are chosen for a specific resonant frequency range. The length and width of the helix are chosen in order to dimension the helical antenna between its linear and circular polarization modes to thereby deliver field-diverse and cross-polarized transmission modes. In order to optimize the manufacturing process, holes may be created within the substrate. These holes are plated with conducting material so that conducting foil on opposite faces of the substrate may be electrically connected. The holes may be offset according to the pitch of the helix. Once the transmitting antenna has been fabricated upon the core substrate, the margin between the plated-through holes and the edge of the substrate may be separated by cutting, sawing, or stamping.

The invention relates to a computer-guided radio interference system, which is characterized in that the output terminal of a power amplifier (A) is respectively connected with the input terminals of a center-fed antenna and a cage antenna; the output terminal of a power amplifier (B) is connected with the input terminal of a discone antenna; the output terminal of an interference exciter is connected with the input terminals of the two power amplifiers; and the input terminal of the interference exciter is connected with a notebook computer and a panel. The computer-guided radio interference system has the advantages of computer guiding, high intelligence, graded setting, stable output power and selectable magnitude. The system has self-checking and automatic protection function on open circuit, short circuit, overheat and overvoltage. The system can also implement effective interference on conventional signals such as single-frequency signals, frequency-collecting signals, frequency-hopping signals and frequency-expansion signals, with the advantages of full intelligentization, wide frequency band, continuous tuning, high stability and adjustable transmission bandwidth. The system can set single-frequency, multi-frequency and wideband-stopping (optional bandwidth from 1 KHz to 20 MHz) interference transmission manners, and can set continuous transmission or timing transmission. The modulation signal can be selected from noise, electronic sound and external sound. The system can be powered by AC and DC and has convenient use.

A bicone antenna is provided with high bandwidth and beneficial return loss performance. The antenna is dipole based and thus its radiation pattern is not strongly influenced by shape and size of a nearby ground plane. A parasitic element comprising a conductive band encircling the antenna's feed structure improves matching, gain flatness, and makes the antenna less susceptible to detuning.

The invention discloses a discone antenna, comprising an upper disc, a center body and support bar parts. The center of the upper disc is provided with a hole which is used for installing the upper end face of the center body, and the tight cooperation between the hole and the upper end face of the center body is realized through an insulation pad. The lower end face of the center body is providedwith a hole for inserting the support bar, and the interference fit is adopted between the hole and the lower end face of the center body. The discone antenna comprises a short oscillator and a longoscillator. The outer surface of the upper disc is evenly provided with a slot for inserting the short oscillator. The periphery of the center body is evenly provided with a slot for inserting the long oscillator. The quantity of the short oscillators is preferably 12, and the quantity of the long oscillators is preferably 12. The discone antenna is in the shape of a conical surface, and is in a unsymmetrical structure. The center of the upper disc is connected to an internal conductor of a coaxial cable, and the conical surface is connected to an outer conductor of the coaxial cable. The longand short oscillators adopt metal rods. The invention is advantageous in that the discone antenna is a vertically polarized and horizontally omnidirectional broadband antenna; the structure is simple, and signal receiving and emitting capability is strong.

Disk antenna includes a plurality of conductive plates forming a stack aligned along a principal axis. The plates include a ground plane plate, a plurality of electrically active plates, and a drive plate disposed between the ground plane plate and the plurality of electrically active plates. A mast is configured to transition from a first condition in which the mast is compactly stowed, to a second condition in which the mast is deployed. Suspension members are configured to couple a radiating end of the mast to the plurality of electrically active plates. The plates are compactly stacked when the mast is in the first condition, and urged to distributed locations along the length of the mast in the second condition.

The invention discloses an application system of an ultra-wideband composite antenna. The system comprises a mounting bottom plate, a rotary table and an antenna cover. The rotary table is fixedly mounted on the mounting bottom plate. A fixed supporting column is arranged on the rotary table. A discone antenna is mounted on the fixed supporting column; a parabolic antenna is arranged above the discone antenna. A mounting base is fixedly connected to the top end of the fixed supporting column. A U-shaped installation groove is formed in the installation base, a driven rotating shaft is arrangedin the U-shaped installation groove, a connecting supporting column is fixedly installed on one side of the parabolic antenna, the connecting supporting column is fixedly connected with the driven rotating shaft through an installation shaft sleeve, and a driving rotating shaft is arranged at the end, close to the rotating table, of the fixed supporting column. Through combination of the parabolic antenna and the discone antenna, ultra-wide frequency band coverage can be met, and the whole system is reasonable in structure, small in size, light in weight and beneficial to installation and use. The antenna is simple in structure and convenient to use.

The invention discloses an improved-type omnidirectional broadband discone antenna, and the antenna comprises a bottom plate metal body, a feed connection column, a conical metal body, and a supporting rod. The lower end of the conical metal body is connected to the top of the supporting rod in a sleeved manner. The feed connection column is vertically disposed at the top of the conical metal body, and the bottom plate metal body is disposed at the top of the feed connection column. The bottom plate metal body is a cylindrical platform, and the periphery of the cylindrical platform is uniformly provided with bottom plate metal rod installation holes in a circle. The upper side of the conical metal body is provided with a circular truncated cone, wherein the upper part of the circular truncated cone is smaller and the lower part of the circular truncated cone is bigger. The lower side of the conical metal body forms an inverted circular truncated cone, wherein the upper part of the inverted circular truncated cone is bigger and the lower part of the inverted circular truncated cone is smaller. The inclined surface of the inverted circular truncated cone is provided with uniform conical metal rod installation holes in a circle. One side, close to the supporting rod, of the conical metal rod installation holes is provided with a rotating channel. The rotating channel takes the surface of the supporting rod as the channel wall, and the channel wall of the rotating channel is provided with a spring, wherein the inclination angle of the spring is 60-80 degrees. According to the invention, the installation and recycling process of the discone antenna is simplified, and the recycling efficiency of the discone antenna is also improved, and the man-made damage rate is reduced.