67 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.

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.

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.

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 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.

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.

The present application relates to the technical field of antennas, in particular to an omnidirectional vertically polarized broadband VHF band antenna for installation in ground communication stations. The antenna includes an antenna radiation oscillator, an antenna dielectric support, and an antenna reflector; the antenna radiation oscillator adopts a symmetrical structural layout, and realizes the VHF The frequency band expands the working bandwidth and controls the antenna radiation direction; the antenna reflector adopts a structural fusion design that compresses the equivalent area in the longitudinal direction, so that the installation size of the antenna in each direction is greatly reduced compared with other antennas, so as to meet the portability of the antenna , Portability and compact installation requirements. The antenna provided by this application meets the requirements of vertical polarization and omnidirectional radiation in the VHF working frequency band in terms of electrical performance, has the characteristics of high radiation efficiency and excellent antenna parameters, and has broad 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.