269 results about "Two band" patented technology

Described are methods, systems, apparatuses, computer program products embodied in a computer-readable storage medium and means for providing online challenges between bands in a musical video game. Typically the invention is executed on a game server in signal communication with a game platform and involves receiving, by the game server, musical game input data representing a musical performance of a band. Then, the game server calculates a composite score from the input data based on a gameplay challenge. Then the composite score is compared to a composite score of a second band's performance for the same gameplay challenge. In some embodiments, the comparison is displayed as a real-time representation of the two bands, even though score of the second band is based on a stored performance of the second band.

A framing aerial reconnaissance camera is described which has a Cassegrain optical system forming an objective lens that directs radiation to a spectrum-dividing prism. The prism directs radiation in the visible portion of the electromagnetic spectrum into a first optical path having a two-dimensional image-recording medium, such as a framing CCD array. Radiation in the infrared (IR) band of the spectrum is directed to a second optical path, which has a two-dimensional framing IR-sensitive image-recording medium. The entire camera can be either rotated about the aircraft roll axis in a continuous fashion or stepped in a series of steps to generate frames of imagery, providing panoramic coverage of the scene across the line of flight in two bands of the spectrum simultaneously.

The invention discloses an MEMS non-refrigerated two-band infrared detector and a preparation method thereof. The detector comprises a silicon substrate, a bottom-layer electrode, and a micro bridge structure anchored on the silicon substrate, and is characterized by also comprising a bridge type controllable reflecting layer which is arranged in a cavity formed by the micro bridge structure and the silicon substrate and anchored on both sides of the bottom-layer electrode and the silicon substrate, wherein the bridge type controllable reflecting layer can be adjusted upward or downward by using anchor points playing a supporting role and a static electricity drive arranged between the bridge type controllable reflecting layer and the bottom-layer electrode, so that the cavity length of a resonance absorption cavity is controllable, and the response at two bands with wavelengths of 3 to 5mum and 8 to 12mum respectively is realized. The method for preparing the detector adopts the surface sacrificial layer process twice to prepare the micro bridge structure and the bridge type controllable reflecting layer, so that the method is simple in process, and easily realized.

A passive electro-optical tracker uses a two-band IR intensity ratio to discriminate high-speed projectiles and obtain a speed estimate from their temperature, as well as determining the trajectory back to the source of fire. In an omnidirectional system a hemispheric imager with an MWIR spectrum splitter forms two CCD images of the environment. Three methods are given to determine the azimuth and range of a projectile, one for clear atmospheric conditions and two for nonhomogeneous atmospheric conditions. The first approach uses the relative intensity of the image of the projectile on the pixels of a CCD camera to determine the azimuthal angle of trajectory with respect to the ground, and its range. The second calculates this angle using a different algorithm. The third uses a least squares optimization over multiple frames based on a triangle representation of the smeared image to yield a real-time trajectory estimate.

The invention provides a dual-band and dual-polarization millimeter wave feed source which comprises a radiation end, a Ka-band orthogonal mode coupling and a W-band orthogonal mode coupling. The radiation end and the couplings use a waveguide structure. Dual bands and dual polarization are realized through single caliber. A high band is located in the middle. Low bands carry out feeding from sides. A high-band dual-mode feed source is connected with an external orthogonal mode coupling. The low bands carry out feeding from a circular waveguide segment with increasing diameter. The dual-polarization feed source has a simple main structure, and breaks through the technical problems of the dual-band and dual-polarization millimeter wave feed source. In order to prevent crosstalk and improve the feed source performance, a filter is added on an output rectangular waveguide segment of a low-band orthogonal mode coupling. The filter is a low-pass filter which has low-band passband and high-band stop-band. Two kinds of polarization exit waveguide of two bands are respectively located in four directions of a major radiation waveguide axis, are in pairwise orthogonal, are staggered up and down, are not located in the same level, and are easily connected with rear end waveguide.

The invention discloses a novel imitative-ecological double-band light-energy conversion agricultural film and a production technology thereof. The light conversion film has long service life and good light conversation performance, a light conversion agent used has low production cost and amount and the mixing ratios of re-light conversion agent and the blue-light conversion agent can be regulated according to different types of plants so as to more effectively use the sun light. The production technology comprises the following steps: light stabilizer, thermal stabilizer, dripping agent, mixed light conversion agents and the like are weighed according to a respective ration against resin, are added into a plasticator, and stirred in a high speed with the stirring speed being controlled; the temperature is controlled till the resin taking the shape of plasticized state; the mixture is discharged and put into a granulation extruder for granulation; and then various types of resins and master batch are weighed accurately, according to the requirements of a technological formula, put into a stirrer for stirring and added into an extruder for extrusion, and coiling, coil stripping and packaging are carried out finally.

The invention relates to an internal multiband antenna intended for small-sized radio devices, and a radio device with such an antenna. The basic structure of the antenna is a two-band PIFA. A parasitic element (230) is added to it inside the outline of the radiating plane (220) of the PIFA, e.g. in the space (229) between the conductor branches (221, 222) of the radiating plane. The parasitic element extends close to the feeding point (FP) of the antenna, from which place it is connected to the ground plane of the antenna with its own short-circuit conductor (235). The structure is dimensioned so that the resonance frequency based on the parasitic element comes close to the one resonance frequency of the PIFA, thus widening the corresponding operating band, or a separate third operating band is formed for the antenna with the parasitic element. Because the parasitic element is located in the central area of the radiating plane and not in its peripheral area, the radio device user's hand does not significantly impair the matching of the antenna on an operating band which has been formed by the parasitic element. In addition, when the resonance frequency based on the parasitic element is on the upper operating band, the matching of the antenna also improves on the lower operating band.

The invention relates to a wireless instrument (1) including a wristband (2) having two band portions (2a, 2b) connected to opposite edges of a casing (3), each band portion having upper and lower surfaces (21,22). At least one single loop antenna (4a) is embedded in one band portion and extends between the corresponding upper and lower surfaces. This single loop antenna is connected via feeding lines (7) through one edge of the casing to an antenna receiver (5). The loop antenna and the feeding lines define a radiating element, wherein the feeding lines are arranged so as to be a negligible part of this antenna radiating element.

The invention discloses a differential dual-band dual-polarized filtering antenna applied to a 5G Sub 6GHz base station system. The antenna comprises upper-layer and lower-layer dielectric substratesand four metal columns connecting the upper-layer and lower-layer dielectric substrates; the upper-layer dielectric substrate 1 is provided with a metal radiation patch, and a metal floor 2 is arranged on the upper surface of the lower-layer dielectric substrate and a metal feeder is printed on the lower surface of the same; the dual-band filtering property of the gain is acquired through slottingthe metal radiation patch and introducing a stepped impedance type open circuit branch knot into the metal feeder. The differential dual-band dual-polarized filtering antenna has the advantages of being simple in structure, easy to machine, relatively wide in resonant bandwidth within radiation band, relatively good in dual-band filter response, stable in gain and directional diagram, relativelylow in cross polarization, relatively high in port isolation, and easy to be integrated with the differential circuit. The differential dual-band dual-polarized filtering antenna can be applied to the5G Sub 6GHz base station communication system, and is particularly suitable for +/-45 degree dual-polarized base station antenna system of two bands: 3.3GHz-3.6GHz and 4.8GHz-5.0GHz.

A bi-directional optical transmission system according to the present invention provides transport of x optical channels over n nodes. The system supports two-way transport of the x channels over a single fiber connecting each of the nodes in sequence. The system is advantageous in that only two optical transmission bands are utilized in order to achieve minimal loss in the separation of bands. The use of only two bands permits the utilization of low-loss wide band thin film optical filters to combine and separate the signals at each node. A reflection port of this filter is used to carry oppositely directed signals of the second band from the bi-directional fiber to an optical amplifier for the second band. An alternate arrangement of the optical filters in the two separate bands is chosen to maximize the optical performance of the overall system and significantly reduce insertion losses.

The invention provides a multi-band communication system comprising extremely high frequencies. The core of the invention is: communicating through multi-band, communicaltion switching between m1-mL frequency band groups and lower f1-fN frequency band groups, using LOS/NLOS identification as a standard to select frequency band, exerting advantages of two bands, avoiding defects thereof, getting well complementation.

A polymer waveguide having low optical loss and no lip around a core is prepared by using a mold having a recessed shape formed by assembling at least two waveguide pattern units having predesigned channels together with two band parts such that the channels of the units are interconnected and open to the band parts, and filling the void generated by contacting the mold and a under cladding layer with a photocurable polymeric resin to form a core layer.

The invention discloses a double circular polarization backfire antenna for double band, which comprises a high-frequency circular polarization antenna component (2), a low-frequency circular polarization antenna component (3) and a reflecting cavity component (1) mutually used by the two; the high-frequency circular polarization antenna component (2) comprises a high-frequency feeding component (21) and a high-frequency primary radiator; the low-frequency circular polarization antenna component (3) comprises a low-frequency feeding component (31) and a low-frequency primary radiator; the high-frequency and low-frequency feeding components are formed by the metal helical wires twisting on medium supports of the helical wires; the low-frequency circular polarization antenna component (3) is sheathed on the outside of the high-frequency circular polarization antenna component (2), and the two are coaxially fixed on the center position of the reflecting cavity component (1); the rotary directions of the metal helical wires of the high-frequency and low-frequency feeding components are opposite. The reception and transmission of the antenna of the invention separately work in two different bands, and two polarizations of the double circular polarization antenna are perpendicular to each other, thereby increasing the polarization isolation between the two bands and improving the overall performance of the system.