69 results about "Airband" patented technology

The present invention provides an improved antenna system on moving platform that is in communication with multiple satellites for simultaneous reception and transmission of RF energy at multiple frequencies. The antenna is implemented as a multi-beam, multi-band antenna having a main reflector with multiple feed horns and a sub-reflector having a reflective surface defining an image focus for a Ka band frequency signal and a prime focus for a Ku band frequency signal.

A method and system for a plurality of airplanes in flight to receive from and send to a plurality of ground stations broadcast and communication signals through a single or a plurality of geostationary satellites, wherein at least the mobile link between said airplanes and said satellite, uplink or downlink, uses the high frequency radio waves at 17 GHz or higher, such as Ka-band. The fixed link between said satellite and said ground stations may use any radio frequencies below the frequencies used to communicate between the satellite and the aircraft. The lower frequencies tend to be less susceptible to rain attenuation and hence suitable for closing the fixed broadcast and communication link. Frequencies such as C-band or Ku-band, or even Ka-band, are applied between satellite and ground such that the available link margin is sufficient to overcome rain attenuation at said ground stations. Said satellite carries a plurality of transponders that may include a plurality of frequency converters to enable the conversion between different frequencies. Said satellite generates a plurality of spot beams, shaped or unshaped, which collectively cover the flight routes of said airplanes, preferably the geodesic path between two highly populated regions.

The present invention is a wide band GaAs microwave monolithic integrated circuit (MMIC) transmit chip that is capable of transmitting linearly or circularly polarized signals when connected to a pair of orthogonal cross-polarized antennas. In an active phased-array antenna environment, this transmit chip is capable of transmitting signals with different scan angles. This invention also contains a digital serial to parallel converter that uses TTL signal to control the phase shifter and attenuator circuits that are required for controlling the polarization and scan angle of the transmitted signal.

The invention brings forward a portable Ku-waveband marine satcom-on-the-move satellite communication antenna system comprising a portable Ku-waveband satellite communication antenna and a portable orientation / rolling rotary table; and an antenna control board and a rotary table control board respectively control the portable Ku-waveband satellite communication antenna and the portable orientation / rolling rotary table. The antenna control board calculates orientation / pitching / rolling angular-rate sensor signals and a satellite beacon receiver signal of the portable Ku-waveband satellite communication antenna so as to form an angular speed of the portable satellite antenna with movement of the orientation / rolling rotary table and satellite beacon receiver signal closed-loop tracking; and the rotary table control board calculates orientation / rolling angular-rate sensor signals at the orientation / rolling rotary table and reads an MEMS inertial navigation rolling angle signal sampled by the antenna control board so as to form the angular speed of the orientation / rolling rotary table with wave bumping and rolling angle position closed-loop tacking, so that the satellite antenna is always in a state of being aligned at the satellite. According to the invention, the application of the portable Ku-waveband satellite communication antenna is extended to the marine field and the system can be carried conveniently.

There is provided an excellent wireless communication device that can suitably perform short range communication by using a millimeter wave.Described are a method of generating a whirl of waves and its characteristic of attenuation proportional to a fourth power of a distance when the waves are in a state L=0 or L=±2. Accordingly, instead of an electric field induction antenna that cannot be used in the millimeter wave band, an initiator and a responder are both equipped with an array antenna generating the whirl of waves to perform communication by using the whirl of waves in the state characteristically attenuating in proportion to the fourth power of the distance, so that the party at the other end approaching can easily be detected while at the same time properly restricting a communication area and preventing improper connection.

Methods, devices, routers and systems for a satellite-ready Satcom Direct router with simultaneous use of Inmarsat, SwiftBroadband, Swift 64, Ku-Band and Ka-Band satellite connections with intelligent traffic control, along with Wi-Fi access and 3G / 4G cellular network connectivity. The router is compatible with existing Wi-Fi access points and is backward-compatible with 802.11b / g. Up to four or more simultaneous wireless networks can be supported, allowing multiple systems to operate on aircraft without additional wireless access points and providing 3G / 4G network connectivity when the aircraft is on the ground. A downloadable Satcom Direct router mobile App provides on-board cabin services including one or more of moving maps, flight tracker and command and control of satellite links.

Disclosed is an infrared-transmitting cover (21) comprising an infrared-transmitting base layer (23) and an infrared-transmitting dielectric multilayer film (24) which is arranged on the base layer (23). The infrared-transmitting cover (21) has optical characteristics since the dielectric multilayer film (24) selectively reflects visible light in a specific wavelength range, and the cover appears in the color corresponding to the specific wavelength range. A cover according to one embodiment of the present invention appears in a color other than black, namely such as blue, yellow or green, thereby enabling to improve decoration ability of infrared signal ports of electronic devices such as portable information terminals.

A short wave omnidirectional antenna for the 26 Megahertz band provides line-of-sight broadcasting at comparatively low power to serve local communities while suppressing sky wave propagation. Sky wave suppression is achieved by a critically configured reflector above the radiator or by a co-located second active or parasitic radiator spaced to achieve sufficient beam tilt to create a null at critical angles, generally from the horizon to thirty degrees above. This arrangement allows local broadcasts to be originated at numerous sites despite the narrow extent of the band (330 kHz) and the narrow (10 kHz) channel width. Among other possible applications, the antenna supports transmission using the Digital Radio Mondiale® (DRM®) system for COFDM. COFDM technology can suppress ghosting and most noise, while low emission angle of the antenna and low intended transmitter power largely prevent interference between broadcasts at moderate distances.

The invention provides a vehicle-mounted FM / AM radio set free from interference of a switching power supply and an anti-interference method thereof. The anti-interference method comprises the following steps: AM (MW) wave band is subdivided into a plurality of sub frequency band; a microprocessor, and a switching power supply which works at less than 1 MHz and is capable of flexibly switching working frequency are utilized; and two different working frequencies of the switching power supply are alternately adopted. As a result, the inherent advantages of the switching power supply, such as low calorific value and high reliability are maintained, serious fundamental wave interference and harmonic wave interference of the working frequency of the built-in switching power supply to FM / AM (MW) reception circuit are eliminated, and the reception result of the type of radio set is greatly improved.

The present invention provides an improved antenna system on moving platform that is in communication with multiple satellites for simultaneous reception of RF energy at multiple frequencies. The antenna is implemented as a multi-beam, multi-band antenna having a main reflector with multiple feed horns and a sub-reflector to reflect Ku and Ka frequency band signals directed by a focal region of the main reflector.

The invention relates to a system for sending data in an optical network comprising source nodes (1-1, 1-2, 1-3, 1-4, 1-5), each capable of generating, in a spectral band that is associated with it, a multi-carrier optical data signal obtained by modulation of a source signal at a source wavelength and of sending this signal in the form of single-band data bursts (11-13, 21-23, 31-33, 41-43, 51-53) that can be associated with distinct source wavelengths, and a combiner (1,2) for combining single-band data bursts, sent by the source nodes in the spectral bands that are associated with them, into multi-band data bursts (61-63, 71-73) occupying a spectral band corresponding to a juxtaposition of the spectral bands associated with the source nodes. In this system, a unit for controlling an instant of sending of said single-band data bursts by the source nodes, implements a control plane taking account of a path time of the single-band data bursts sent by the source nodes to the combiner.

The invention provides a 30MHz-512MHz multi-band 2.5m whip antenna, which mainly solves the impedance matching problem between the antenna and the radio station. The entire antenna includes: a radiator, a coaxial cable 18, and a base 6. The radiator adopts a combined structure of a lower radiator 7 and an upper radiator 5. The lower radiator includes a lower copper tube 1 and an upper copper tube 3, two copper tubes The tubes are connected by a transmission line transformer 2, and a radiation oscillator 4 is fixed in the upper copper tube to form a sleeve antenna structure. The transmission line transformer adopts a three-winding center tap, and is equipped with four coils, which are respectively connected to the inner conductor, outer conductor, upper section copper tube, and lower section copper tube of the coaxial cable. It is used as both an electronic switch and an impedance matching element. Ultra-wideband characteristics in the 30MHz~512MHz frequency band. The invention has the advantages of wide frequency band, small standing wave ratio, high gain, no need for tuning, and can be directly matched with radio stations, and is suitable for installation on various armored vehicles and ships.

The invention discloses a communication and lighting multiplex LED lamp. The LED lamp comprises two functions, wherein one of the functions is white-light lighting, and the other function is being used as a transmitting terminal of infrared communication. As to the function of lighting, one or more types of rare earth ions such as Dy3+, Sm3+, Tb3+, Eu3+, Eu2+, Ce2+, Tm3+, Ho3+ and the like and transition metal ions such as Mn2+, Sn4+ and the like are taken as an active luminescence center, glass or transparent glass ceramic is taken as a base material, and fluorescent light is excited to be emitted through an ultraviolet or a blue LED chip. The infrared communication transmitting terminal takes an infrared LED chip which is suitable for being used as a short-range wireless infrared communication channel (800nm-1000nm waveband) as a signal emission source, modulated pulses are loaded to a driving circuit of the infrared LED chip, then electric signals are converted into wireless optical signals, and transmission and delivery of information are carried out. The LED lamp disclosed by the invention has the advantages of low preparation cost, good stability, large modulation bandwidth, high modulation power, long service life and small size.

The invention relates to a multiband all-metal frame adjustable mobile phone antenna, including an all-metal frame and a circuit board. A gap is formed between the all-metal frame and the circuit board, and electromagnetic waves radiates through the gap; the left lower side of the circuit board is provided with an L-shaped cutting groove, a feed port and an adjustable element are arranged in the position of the L-shaped cutting groove, one end of the feed port is connected with the circuit board, the other end is connected with the adjustable element in series, and required low-frequency and high-frequency bands are obtained by switching of two values of the adjustable element; an outer side of the left lower side of the circuit board is provided with an L-shaped metal block whose inner side is matched with a corner of the circuit board and outer side is adjacent to a left corner of the all-metal frame; a short circuit point is arranged between the left side of the all-metal frame and the circuit board; the right side of the all-metal frame and the circuit board are connected through an adjusting element; and required high-frequency bandwidth is obtained by adjustment of the value of the adjusting element. The antenna has a large coverage area of working frequency bands and good working performance, is easy to realize, and is suitable for a mobile communication terminal.

The invention relates to an S waveband segment-based multi-ary chirp modulated wireless communication system. The system comprises a transmitter and a receiver; the receiver receives transmitting signals from the transmitter; the transmitter comprises an FPGA, a system clock, a high speed DDS unit, a radio frequency local oscillation unit, a mixer, a power amplifier and an antenna; the FPGA drives the high speed DDS unit to generate chirp coding signals; the radio frequency local oscillation unit generates local oscillation signals; the chirp coding signals and the local oscillation signals are mixed by the mixer; the frequency spectrums of the chirp coding signals are shifted to a 2-4 GHz frequency band through mixing; the mixed signals are sent to the power amplifier for amplification; the amplified signals are transmitted by the antenna; the FPGA codes according to customized data demanded ary and selects a transmitting bandwidth and a frequency band interval; the customized data comprise a digital ary, a coding bandwidth, a coding segment interval and a transmitting frequency band; and the system clock provides clock frequencies to the high speed DDS unit and the FPGA.

The invention discloses a broadband signal receiving method. The method of the invention performs Fourier transform based on photonic technology on the received broadband radio frequency signal and performs time domain analysis on the converted signal to obtain time domain delay information of the broadband radio frequency signal. At that same time, photon-assisted high-resolution reception is carry out on the broadband radio frequency signal, and parameters of the photon-assisted high-resolution reception are real-time control according to the time-domain delay information, thereby realizinghigh-precision full-coverage reception of the radio frequency signal in the broadband range. The invention also discloses a broadband signal receiving device and an electronic warfare receiver. The invention can realize the real-time, reconfigurable and high-precision reception of the multi-frequency band broadband coverage signal, and avoids the excessive resource cost required for the full-bandcoverage and high-resolution fine reception.

In a video processing system, a method and system for a mobile receiver architecture for European (EU) Band cellular and broadcasting are provided. Receive channels may be processed in at least one radio frequency front end (RFFE) in a mobile terminal and may comprise at least one of a VHF / UHF broadcast channel and EU band cellular channels capable of carrying voice and data. The cellular channels may be WCDMA 2100 MHz, GSM 1800 or 900 MHz. A single cellular / broadcast radio frequency integrated circuit (RFIC) may be utilized for processing the receive channels. In another embodiment, a cellular band RFIC may process the EU band cellular channels and a broadcast RFIC may process the broadcast channel. Moreover, a first RFIC may process the WCDMA channel, a second RFIC may process the GSM channels, and a broadcast RFIC may process the broadcast channel.

The invention provides a Ka band antenna satellite searching system and method. The system comprises a satellite antenna, a frequency converter, a modem, an antenna controller, an antenna servo systemand a GPS antenna, wherein the satellite antenna and the frequency converter are connected; the frequency converter and the modem are connected; the modem and the antenna controller are connected; and the antenna controller is connected with the antenna servo system and the GPS antenna respectively. In the case of satellite searching, the modem transmits the signal-to-noise ratio of satellite signals to the antenna controller, the antenna controller controls the satellite antenna to rotate to the azimuth and the pitching position with the maximum signal-to-noise ratio according to the signal-to-noise ratio. The system and the method have the advantages that the motor system is manipulated to automatically adjust the position of the antenna according to the signal-to-noise ratio, and quick, high-precision, simple and automatic satellite searching is realized.

The invention relates o a C / X dual-wave waveband shared aperture waveguide slot array antenna, which is mainly applied to a multi-functional and multi-purpose composite radar. The antenna comprises an X waveband waveguide slot antenna, a radiation transition cavity and a C waveband waveguide slot antenna, wherein the X waveband waveguide slot antenna adopts a waveguide narrow-side inclined slot radiating unit; the C waveband waveguide slot antenna adopts a waveguide wide-side slot radiation array antenna. The working frequency difference of the two antennae is used, the C waveband waveguide slot antenna is placed behind the X waveband waveguide slot antenna, impedance matching from the C waveband waveguide slot antenna to an X waveband antenna linear array slot is realized by using the radiation transition cavity, and electromagnetic wave radiation of the C waveband waveguide slot antenna is realized through the linear array slot.

The invention provides an S-band dual-polarization base station antenna for mobile 5G communication, and a base station. The antenna comprises a radiation patch, an open circuit matching branch node,a patch metasurface and a coaxial feed probe. The tail end of the coaxial feed probe is connected with the radiation patch, and the open circuit matching branch node is connected with the coaxial feedprobe. The radiation patch comprises a square patch which is etched with four axial symmetrical gaps, and the tail ends of the two coaxial probes are connected with the patch, wherein the distances from the feed points to the center of the patch are equal. The two sections of the open circuit matching branch node are respectively connected with the two coaxial probes and are located below the radiation patch. The multi-patch metasurface layer comprises 12 circular patches and four square patches at four corners, and is located right above the radiation patches. The antenna is simple in structure and low in manufacturing cost, and greatly reduces the profile of the antenna on the premise that the size is guaranteed. The working frequency band covers the 5G frequency band, and the antenna has higher radiation gain, achieves dual polarization and high polarization isolation at the same time, and is good in application prospect.

Various wireless systems may benefit from suitable sharing of antennas and related equipment. For example a various avionics systems may benefit from systems and methods for providing a distance measurement equipment L-band shared antenna. Circuitry can include an interface to a bottom omni-directional antenna. The circuitry can also include a radio frequency splitter in switchable communication with the interface to the bottom omni-directional antenna. The circuitry can further include an interface between the radio frequency splitter and a distance measurement equipment receiver. The circuitry can additionally include an interface between the radio frequency splitter and a surveillance receiver.

Disclosed is an infrared-transmitting cover (21) comprising an infrared-transmitting base layer (23) and an infrared-transmitting dielectric multilayer film (24) which is arranged on the base layer (23). The infrared-transmitting cover (21) has optical characteristics since the dielectric multilayer film (24) selectively reflects visible light in a specific wavelength range, and the cover appearsin the color corresponding to the specific wavelength range. A cover according to one embodiment of the present invention appears in a color other than black, namely such as blue, yellow or green, thereby enabling to improve decoration ability of infrared signal ports of electronic devices such as portable information terminals.

The invention relates to a multiband metal back cover integrated MIMO (multiple input multiple output) mobile phone antenna which comprises a dielectric plate, a metal frame, an L-shaped upper radiation branch node, an upper feeding point, a right short-circuit point, a lower feeding point, an L-shaped lower radiation branch node, a left short-circuit point and a metal back cover; The dielectric plate is integrated on the metal back cover, the metal frame is fixed on the outer side of the dielectric plate in a totally-closed manner, and a gap is formed between the metal back cover and the metal frame; the metal frame and the dielectric plate are symmetrically divided into an upper port and a lower port through the right short-circuit point and the left short-circuit point, the upper feeding point and the lower feeding point are distributed on upper and lower sides of the right short-circuit point, and the upper and lower ports respectively correspond to the upper feeding point and the lower feeding point and form the MIMO antenna with the upper and lower feeding points; the L-shaped radiating branch node and the L-shaped radiating branch node are arranged at the upper and lower ends of the metal back cover. The antenna is 820-965MHz in low frequency bandwidth, 1690-2780MHz in high frequency bandwidth, and operation frequency range covers all frequencies of GSM850, GSM900, DCS1800, PCS1900, UMTS, LTE2300 and LTE2500. The multiband metal back cover integrated MIMO mobile phone antenna is good in operation performance and suitable for mobile communication terminals.

The invention relates to the technical field of antennas, in particular to an omni-directional vertical polarization broadband VHF waveband antenna used for ground communication station installation.The antenna comprises antenna radiation oscillators, antenna medium pillars and an antenna reflection disc; the antenna radiation oscillators adopt symmetrical structural layout, the expansion of working bandwidth in a VHF frequency band is realized through gradually varied distribution of the proportionality coefficients of vertical inverted trapezoidal surfaces to horizontal inverted trapezoidalsurfaces inside the antenna radiation oscillators, and the function, in the radiation direction, of the antenna is controlled; the antenna reflection disc adopts a structure fusion design that the equivalent area is compressed longitudinally upwards, and the installation dimensions, in all directions, of the antenna are decreased to a greater extent compared with those of other antennas, so thatthe requirements, such as convenience, portability and compact installation, of the antenna are met. The antenna provided by the invention meets the vertical polarization and omni-directional radiation requirements in the VHF working frequency band on electrical performance, has the characteristics of high radiation efficiency and excellent antenna parameters, and is wide in application prospects.

The invention discloses a wired and wireless converged communication system, a wired and wireless converged communication method and a method and a device for generating multi-waveband signals. The method for generating the multi-waveband signals in the wired and wireless converged communication system comprises the steps: in a central office, data signals are uploaded through an offset port of a Mach-Zahnder modulator, and clock signals with 10 GHz of frequency is used as drive signals of the Mach-Zahnder modulator to obtain multi-waveband output signals with base bands, primary carrier waves and secondary carrier waves; and in a base station, a base band signal, a microwave signal with 20 GHz of frequency and a millimeter wave signal with 40 GHz of frequency are separated from the multi-waveband output signals through a carrier wave separating device. The generation of the multi-waveband signals is achieved only by using one single-drive modulator, the cost is saved, the adjustment is simple, optimal results are easily obtained, each spectrum component of downstream multi-waveband signals contains data, and accordingly the frequency spectrum utilizing rate is improved.

The invention discloses a vertically polarized broadband UHF (Ultra High Frequency) waveband antenna. An antenna housing has a hollow cylindrical tubular structure, the upper end of the antenna housing is a sealing face, and the lower end is an opening; a reflecting base plate is a stepped cylinder of which the center is provided with a through hole; an insulating spacer is placed in the through hole; an active array has a U-shaped structure which is integrally formed by bending a rectangular aluminum rod; the two edges of the U-shaped structure are symmetrically distributed, and the top end is an open part; the active array is perpendicular to the upper surface of the reflecting base plate; an inner conductor of a radio frequency connecting piece penetrates through the insulating spacer to be fixedly connected with a mounting through hole on the bottom of the active array; the metal aluminum is made into a cylindrical short-circuit rod to be mounted at through holes on two arms of the active array; and a 50-ohm copper shaft cable is connected with the antenna by the radio frequency connecting piece. In the invention, the antenna meets requirements of vertical polarization and omnidirectional radiation; antenna gain reaches 2dB; 3dB beam width of the antenna is 65 degrees; and the width of frequency band below standing wave 2 is about 20 percent.