67results about How to "Good broadband performance" patented technology

Mechanisms for providing a subscriber-side interface with a passive optical network are described herein. An optical network termination (ONT) having an integrated broadband passive optical network processor is utilized to receive downstream data from an optical line termination (OLT) via a passive optical network and provide the contents of the downstream data to one or more subscriber devices via one or more data interfaces. Similarly, the ONT is adapted to receive and transmit upstream data from the one or more subscriber devices to the OLT via the passive optical network. The ONT preferably implements one or burst buffers for buffering upstream and / or downstream data. The ONT can be adapted to notify the OLT of the status of the burst buffer, thereby allowing the OLT to modify the bandwidth allocations.

Mechanisms for providing a subscriber-side interface with a passive optical network are described herein. An optical network termination (ONT) having an integrated broadband passive optical network processor is utilized to receive downstream data from an optical line termination (OLT) via a passive optical network and provide the contents of the downstream data to one or more subscriber devices via one or more data interfaces. Similarly, the ONT is adapted to receive and transmit upstream data from the one or more subscriber devices to the OLT via the passive optical network. The ONT preferably implements one or more encryption / decryption mechanisms, such as the digital encryption standard (DES), to provide data protection in addition to, or in place of, data churning provided for by the ITU G.983 recommendations.

The embodiment of the invention discloses a wideband dual-polarization array antenna and a base station, wherein the wideband dual-polarization array antenna includes an antenna unit, a metal reflection board, and a metal separation board, the antenna unit being separated by the metal separation board. The antenna unit contains a feed piece and a double-layer radiation patch. A first end of the feed piece is configured at the bottom radiation patch of the double-layer radiation patch so as to form a feeding point, and a second end of the feed piece is connected to a feed structure so as to form a feeding port. The bottom patch of the double-layer radiation patch is provided a slot at the upper surface thereof. A hole is opened within the slot to fixedly connect the fist end of the feed piece in order to form capative reactance. The embodiment of the invention form capative reactance by providing a slot on the upper surface of the bottom patch of the double-layer radiation patch of the array antenna, which enables an easy resonance in each radiation patch of the double-layer radiation patch of the array antenna. The array antenna can realize wideband with efficiency.

An antenna includes a dipole feed, a first dipole element connected to and extending outwardly from the dipole feed, a transmission line extending from the dipole feed in an opposite direction, and a flexible electrically conductive sleeve surrounding the transmission line and connected to and extending outwardly from the dipole feed. The electrically conductive sleeve may thus serve as a second dipole element and as a balun for the antenna. The antenna may by removably fastened to a garment of the user by at least one fastener, and the antenna may be connected to a radio also carried by the user. To enhance broadband performance, the dipole feed may include a broadband matching network, and the antenna may include a noise filter coupled to the transmission line adjacent an end of the flexible electrically conductive sleeve opposite the dipole feed.

The invention discloses a multiband wireless terminal antenna, mainly solving the problems that the antenna in the prior art can not meet the requirements of people for miniaturization, high accuracy and convenience in use. The multiband wireless terminal antenna comprises a shell, a printed board and a printed board metal floor and also comprises a high-frequency resonance metal strip group, a low-frequency resonance metal strip group, a microstrip feeder and a stop band, wherein the printed board is arranged in the shell; the printed board metal floor is arranged on one surface of the printed board; the high-frequency resonance metal strip group is arranged on the other surface of the printed board; the low-frequency resonance metal strip group corresponds to the high-frequency resonance metal strip group; the microstrip feeder is connected with the end part of the high-frequency resonance metal strip group; the stop band is connected between the high-frequency resonance metal strip group and the microstrip feeder; and a coupling gap is arranged between the high-frequency resonance metal strip group and the low-frequency resonance metal strip group. By the scheme, the multiband wireless terminal antenna has the advantages that the purposes of small volume, high accuracy and convenience in use are achieved and the practical and promotional values are high.

A substrate includes a single-layer capacitor and various external contacts. A first external contact provides a first electrical connection to the single-layer capacitor. A second external contact provides a second electrical connection to the single-layer capacitor. The first and third external contacts are electrically connectable to another electrical component, and internal metallization structures or vias of conductive material electrically connect the second contact and the third contact to facilitate the single-layer capacitor being connectable in a parallel circuit with the other electrical component.

An improved patch radiator is characterised by the following additional features: the radiator surface (11) is designed as an annular and / or frame-shaped radiator surface (11), extending around a recess area (13), - the radiator surface (11) is extended so as to transition into the lateral surfaces or lateral walls (3c), and on the lateral surfaces or lateral walls (3c), a lateral surface radiator structure (18) electrically connected to the radiator surface (11) is formed, comprising, in the peripheral direction of the lateral surfaces or lateral walls (3c), lateral radiator surface sections (19), between which electrically non-conductive recess areas (20) are provided.

The invention relates to a COTM satellite communication dual polarization quadruple ridged horn array antenna which is characterized in that 192 quadruple ridged horns are arranged at equal intervals in a square regular array; an azimuth plane comprises 32 columns, and a pitch plane comprises 6 rows; metal compensation grid plates are arranged at openings of the 192 quadruple ridged horns; each metal compensation grid plate divides each quadruple ridged horn into four small equal radiation units, so that the space of the 768 small radiation units formed on an array plane is smaller than a wave length, and when constant-amplitude same-phase feeding occurs to the planes, grating lobes cannot appear in a visible space, and the technical index requirements of the International Telecommunication for access wide-angle sidelobe envelope can be met. According to the antenna system, all technical indexes are advanced, the work is stable and reliable, the insertion loss is low, noise is little, and the antenna is provided with an ultrathin low profile and particularly suitable for being taken as a COTM satellite communication antenna of a mini-automobile, and can be widely used in fields such as radars, communication, remote sensing, remote measuring and the like.

The invention provides a broadband reduction RCS composite material based on crossed bow-tie-shaped AMC (artificial magnetic conductors). The material is characterized in that the composite material is in a three-layer structure, and comprises an AMC patch array, a medium substrate, and a metal floor in sequence from top to bottom, wherein the AMC patch array is arrays respectively formed by two kinds of crossed bow-tie-shaped AMC patches. The shapes of the two kinds of crossed bow-tie-shaped AMC patches are that the center is square, four edges of the square are respectively connected with four trapezoids, the short bottom edges of the trapezoids are connected with the square, the long bottom edges of the four trapezoids are connected with rectangles in sequence, and each patch is a whole integrated structure. The composite material is good in broadband performance. Compared with a metal sheet in the same size, the composite material has RCS reduction of more than -10 dB in the frequency range of 16.2-27.2 GHz, covering the whole K-band. The composite material is small in thickness, and can be conformal easily. The composite material is suitable to manufacture ultralight and ultrathin wave absorbers or radar absorbing materials. The composite material is simple in structure and materials, and is low in processing and manufacturing difficulty.

The invention relates to a radio frequency digital interference canceller, which mainly comprises a reference radio frequency sampling circuit, an error radio frequency sampling circuit, a radio frequency cancelling output circuit, a clock circuit, a time delay line, a noise source and a digital signal processing unit. The radio frequency digital interference canceller provided by the invention adopts a radio frequency digitalization technology system for the first time, provides a specific circuit construction scheme and a signal processing method, adopts a no-delay LMS (least-mean-square) adaptive filtering technology, and put forward an RLS (Recursive least-square) based closed loop nonlinear group delay correction method. The radio frequency digital interference cancels is characterized in that extraction of error signals and reference signals is carried out in a digital domain; adaptive filtering, weighting and waveform generation are carried out in the digital domain; and interference cancelling is still carried out in an analog domain. The radio frequency digital interference canceller has the technical advantages of small size, light weight, high waveform adaptability, ability of cancelling waveforms such as fixed frequency, frequency hopping and pulses, good broadband performance, ability of cancelling multi-source interference and high cancelling suppression ratio.

A sound suppression apparatus for installation inside a gas transport duct is provided. The sound suppression apparatus comprises a resistive sound-absorbing element (110) and a housing providing a reactive sound-attenuating element (130) communicating with a surrounding of the apparatus via opening in an outer surface of the housing. An outer surface of the sound suppression apparatus comprises an outer surface of the resistive sound-absorbing element and the outer surface of the housing. A gas transport duct comprising the sound suppression apparatus is also provided.

The device has loop antenna element (18) comprising antenna sections (20,22) that are provided in the same plane. The antenna section (24) is provided in another plane parallel to former plane, and the antenna sections (26,28) are provided for interconnecting antenna sections (20,22,24). The antenna sections form a three-dimensional structure with two-dimensional extension in one of the planes. An independent claim is also included for antenna arrangement.

Disclosed are a three-circuit inverted Doherty power amplifier and an implementation method, which relate to the technical field of communications. The method comprises: amplifying the power of a signal input to a main circuit, to obtain a power amplified signal of the main circuit; amplifying the power of a signal input to a first auxiliary circuit, to obtain a power amplified signal of the first auxiliary circuit; amplifying the power of a signal input to a second auxiliary circuit, to obtain a power amplified signal of the second auxiliary circuit; subjecting the power amplified signal of the first auxiliary circuit and the power amplified signal of the second auxiliary circuit to phase compensation respectively and then combining the power amplified signal of the first auxiliary circuit and the power amplified signal of the second auxiliary circuit with the power amplified signal of the main circuit, and outputting the resultant signal. The power amplifier and the implementation method mentioned above can meet the requirement of new generation of communication systems for signals with large peak-to-average ratios, and simultaneously can also ensure a higher efficiency under the requirement for large peak-to-average ratios.

The invention relates to the technical field of integrated circuit design and manufacture, in particular to a single chip power amplifier which is widely used for various kinds of active radar components of W wave band millimeter waves and communication systems. An input match circuit is integrated on a single chip, the input end of the input match circuit is connected with an external signal input source, the output end of the input match source is sequentially connected with a four-level transistor amplifier, an output match circuit and a power synthesis circuit in series and then outputs outside, wherein the four-level transistor amplifier comprises a first level transistor amplifier, a second level transistor amplifier, a third level transistor amplifier, and a fourth level transistor amplifier. The single chip power amplifier can be widely used for the fields of various kinds of active radar components of W wave band and millimeter wave communication systems. The single chip power amplifier has the advantages of being wide in working frequency range, stable in full frequency range property, and capable of effectively decreasing an area of a chip and loss, and achieving high power output of the chip.

A phase shifter circuit includes a plurality of first series circuits each comprised of a series connection of one capacitor and one resistor, a first circuit element including at least inductance connecting between a first end and a second end of a chain structure made by connecting the plurality of first series circuits in series, the first circuit element and the chain structure together constituting a first loop circuit, a plurality of second series circuits each comprised of a series connection of one capacitor and one resistor, a second circuit element including at least inductance connecting between a first end and a second end of a chain structure made by connecting the plurality of second series circuits in series, the second circuit element and the chain structure together constituting a second loop circuit, and a plurality of connection lines connecting between the first loop circuit and the second loop circuit.

The present invention provides a broadband waveguide mixer, comprising: a waveguide having a substantially v-shaped groove in its inner surface; a broadband antenna coupling in the V-groove; and mixing means for mixing signals received by the broadband antenna. The present invention further provides a high frequency electromagnetic wave receiver comprising the aforesaid broadband waveguide mixer. The broadband waveguide mixer and the high frequency electromagnetic wave receiver have the advantages of broad single mode operating frequency band, lower loss, lower noise, and they can be easily produced and assembled to lower cost.

A pluggable module comprising a housing having a first end and second end, an edge connector disposed at the first end, an F-type coaxial connector at the second end and a release lever including a stamped body that is symmetrical about a centerline bisecting the length of the body. The pluggable module may comprise a miniature balun disposed within the module for converting between a single-ended input to a differential load

An apparatus having a first circuit and a second circuit. The first circuit may be configured to generate an output signal in response to an intermediate signal. The first circuit may be implemented using a first transistor type. The second circuit may be configured to generate the intermediate signal in response to (i) an input signal and (ii) a feedback of the output signal. The second circuit may be implemented using a second transistor type. The output signal is an amplified version of the input signal while maintaining linearity.

The invention discloses an antenna array, by setting three substrate layers, attaching patches with different sizes to a first metal layer surface in a first substrate layer, setting a coupling slot at a metal layer in a second substrate layer, setting a feed microstrip as a metal layer in a third substrate layer, and setting at least one metal through hole which surrounds the feed microstrip in the second substrate layer and the third substrate layer, so the antenna array of the embodiment of the invention has high isolation and better broadband performance, and the antenna array has the advantages that various communication performance indexes of the antenna array is improved, the applicability of a large antenna array is improved, and the high integration of the large antenna array is ensured.

An antenna system includes a reflector having a focal point, and a phased array having feed elements. Each feed element is disposed a same distance from the focal point of the reflector. A method for varying the beamwidth of an antenna system includes providing the antenna system with a reflector having a focal point and feed elements disposed a same distance from the focal point. The feed elements includes one or more inner feed elements and one or more outer feed elements. The method further includes adjusting relative amplitudes of the inner feed elements and the outer feed elements to adjust the beamwidth of the antenna system. An antenna system includes a parabolic reflector having a focal point, and a phased array having one or more inner feed elements and one or more outer feed elements. Each of the feed elements is disposed a same distance in wavelengths from the focal point, and is oriented towards the focal point.

A high frequency attenuating device for an air flow induction system of a vehicle employing a thermoformed fibrous mat of any shape that fits robustly inside the duct. The dissipative nature of the fibrous mat helps in achieving broadband attenuation in the high frequency regime. The ability to manufacture the fibrous mat into any shape helps with restriction, targets different attenuation bands, and makes it more feasible to manufacture. Hybrid solutions are possible when combined with low frequency perforated silencers or high frequency QWT arrays injection molded onto them.

The invention discloses a broadband folding plane reflection array antenna which comprises a dielectric substrate, a feed horn, a polarization grid and a large number of reflection units printed on the dielectric substrate, wherein each reflection unit adopts a double-resonant structure and is composed of a Jerusalem cross patch arranged in the center and two pairs of rectangular patches arranged on the periphery, the unit has a flat phase shift curve and a phase shift range exceeding 450 degrees, so that the broadband performance of the antenna is realized. The broadband folding type plane reflection array antenna is simple in structure, low in profile, good in mechanical stability and free of shielding of a feed source and a support.

The invention, which belongs to the technical field of integrated waveguide, puts forward a full-modal-waveguide-structure-based substrate-integrated waveguide directional coupler. The substrate-integrated waveguide directional coupler comprises a first layer dielectric substrate, a second layer dielectric substrate, and a port. An upper metal layer is arranged on the upper surface of the first layer dielectric substrate; and a coupling metal layer is arranged on the lower surface of the first layer dielectric substrate. The upper metal layer includes an upper metal layer feeding structure and a waveguide upper surface; and coupling holes are formed in the coupling metal layer. The upper surface of the second layer dielectric substrate is in contact with the coupling metal layer arranged at the lower surface of the first layer dielectric substrate. A lower metal layer is arranged on the lower surface of the second layer dielectric substrate and includes a lower metal layer feeding structure and a waveguide lower surface. Metallic via hole arrays are arranged at the two long sides of the upper metal layer and the lower metal layer. The structure of the directional coupler becomes compact, so that the horizontal dimension of the directional coupler is reduced substantially; and the practical performances of the directional coupler are improved.

The invention discloses a broadband electromagnetic dipole circularly polarized antenna, and the antenna comprises an electric dipole, a magnetic dipole, an inverted L-shaped feed sheet, a metal wall,a floor and a coaxial connector; the electric dipole consists of a pair of metal sheets parallel to the floor, and the magnetic dipole consists of a pair of metal sheets which are vertical to the floor and are short-circuited with the floor; the electric dipoles are arranged on the magnetic dipoles and are in central symmetry about the center of the floor; the inverted L-shaped feed sheet is arranged on the floor, is connected with an inner conductor of the coaxial connector arranged on the back surface of the floor and is used for coupling and feeding the electric dipole and the magnetic dipole, and the metal walls are arranged in the centers of four sides of the floor. The broadband electromagnetic dipole circularly polarized antenna has better broadband performance, and is convenient to process and good in mechanical stability.