209 results about "Electrical tuning" patented technology

An optical phase lock loop (OPLL) system is disclosed that includes a master external cavity laser (ECL), and a substantially identical slave ECL. The master and slave ECLs are fabricated using a planar semiconductor device with waveguide-integrated planar Bragg gratings (PBG). Both the master and slave ECLs have a narrow linewidth and a low frequency-noise. Each of the ECLs has their own controller-modulator circuits for thermal tuning or electrical tuning via direct modulation. A laser-select-logic (LSL) module receives and processes a filtered phase error signal from a loop filter coupled to an electronic PLL device, and directs the processed phase error signal to one or both of the master and slave controller-modulators according to a logical determination of a required mode of operation of the OPLL system in order to achieve a stable and identical phase performance of the master and the slave ECLs. The required mode of operation is chosen from a locking mode, a prediction mode, a tracking mode, and a searching mode.

A tunable metamaterial has a two dimensional array of resonant annular ring elements; and a plurality of voltage controllable electrical tuning elements disposed in or adjacent openings in each of said ring elements, each of said voltage controllable electrical tuning element ohmically contacting portions of only one of said ring elements. The voltage controllable electrical tuning elements may comprise highly doped semiconductor tunnel diodes, or the charge accumulation layer at the semiconductor / insulator interface of a metal-insulator-semiconductor structure, or nanoelectromechanical (NEMs) capacitors. The tunable metamaterial may be used, for example, in an optical beam steering device using the aforementioned tunable optical metamaterial in which a free-space optical beam is coupled into a receiving portion of a plane of the optical metamaterial and is steered out of a transmitter portion of the plane of the optical metamaterial in controllable azimuthal and elevational directions. The tunable metamaterial additionally has other applications.

The invention discloses a radio frequency electrically adjusted band-pass filter with a constant absolute bandwidth. The band-pass filter consists of an upper-layer micro-band structure, a middle medium basal plate and lower-layer grounding meta, wherein the upper-layer micro-band structure comprises a first half wavelength resonator, a second half wavelength resonator, an input feed network, an output feed network, an input port and an output port, wherein a fifth micro-band line of the first half wavelength resonator and a seventh micro-band line of the second half wavelength resonator are arranged in parallel to form an interstage coupling structure; the first half wavelength resonator consists of a first micro-band line, a second micro-band line, a third micro-band line, a fourth micro-band line, a fifth micro-band line, a sixth micro-band line and a variable capacitance diode; and the second half wavelength resonator and the first half wavelength resonator have the same structure, and are symmetrically arranged based on the central axis of the interstage coupling structure. The radio frequency electrically adjusted band-pass filter has the characteristics of keeping the absolute constant bandwidth while resonating the center frequency and inhibiting second harmonic wave, and can be applied to the reconfigurable radio frequency front-end in wireless communication.

The invention discloses a offset T type head that comprises the first port, the second port, the third port, blocking condenser, the first inductance, the second inductance, modem, thereinto, the second inductance is used to connect the first port, the second port transmits said direct current; the invention also provides a system which controls antenna that comprises electricity controlled antenna drive motor unit, electricity controlled antenna, tower top amplifier, offset T type head and base station; according to the offset T type head of the invention, when the non- electricity controlled antenna is updated to the electricity controlled antenna, there is no need to be instead of STMA, so the cost is decreased, the electricity controlled antenna controller is not added, and the technique problem of poor applicability using electricity controlled antenna controller can be avoided, and the base station do not need to provide connection port, without longer cable, the amount of work is decreased.

The invention is suitable for the field of antennae, and provides an electric tilt antenna and a base station. The electric tilt antenna comprises an antenna reflector used for adjusting wave beams, a phase shift network of an unequal-amplitude Butler matrix used for shifting the wave beams to form two wave beams having a preset included angle, and an assembly, wherein the antenna reflector, the phase shift network and the assembly are parallelly arranged from top to bottom and fixedly connected together through supports; the upper surface of the antenna reflector is provided with four rows of bipolar radiation units used for transmitting and receiving electromagnetic waves; and the assembly comprises a feed network with phase shift function and a transmission structure used for adjustingan electronic down tilt, which are connected together. The phase shift network of the unequal-amplitude Butler matrix shifts the wave beams to generate two independent wave beams having the preset included angle, so that a single sector can be upgraded into two sectors under the condition of not obviously influencing adjacent base stations; therefore, the aims of widening a coverage area and expanding capacity are fulfilled.

A tunable metamaterial has a two dimensional array of resonant annular ring elements; and a plurality of voltage controllable electrical tuning elements disposed in or adjacent openings in each of said ring elements, each of said voltage controllable electrical tuning element ohmically contacting portions of only one of said ring elements. The voltage controllable electrical tuning elements may comprise highly doped semiconductor tunnel diodes, or the charge accumulation layer at the semiconductor / insulator interface of a metal-insulator-semiconductor structure, or nanoelectromechanical (NEMs) capacitors. The tunable metamaterial may be used, for example, in an optical beam steering device using the aforementioned tunable optical metamaterial in which a free-space optical beam is coupled into a receiving portion of a plane of the optical metamaterial and is steered out of a transmitter portion of the plane of the optical metamaterial in controllable azimuthal and elevational directions. The tunable metamaterial additionally has other applications.

The embodiment of the invention discloses a control method and system of an electrically tunable antenna, an electrically tunable antenna controller and a maintenance terminal. The method comprises the following steps of: sending relevant information of the electrically tunable antenna to the maintenance terminal through a wireless channel, so that the maintenance terminal can send a control command according to the relevant information of the electrically tunable antenna; receiving the control command sent by the maintenance terminal through the wireless channel; and controlling the regulation of the electrically tunable antenna according to the control command. The invention is applicable to controlling the electrically tunable antenna.

The invention provides an inclination angle remote control system of an electric tuning antenna, which comprises at least one electric tuning antenna positioned on the tower top side with an adjustable inclination angle; at least one electric tuning antenna control device for controlling and adjusting the inclination angle of the electric tuning antenna; and an electric tuning control module for communicating with the electric tuning antenna control device for controlling the electric tuning antenna control device and managing the electric tuning antenna, wherein the electric tuning antenna is connected with the electric tuning antenna control device through an AISG cable; and the AISG cable supplies power to the electric tuning antenna and a tower-top amplifier through six pins. The invention can achieve improved adjusting accuracy, simpler maintenance and more flexible networking, and meet the requirement of different application occasions, thus optimizing high-quality network, reducing the operation and the maintenance cost and improving the benefits.

The invention belongs to the field of communication technology and particularly relates to an electrical tilt antenna control method. The method comprises the steps of receiving a setting command which comprises a mapping relationship between an AISG (antenna interface standards group) interface and an electrical tilt unit is sent by control equipment; setting or modifying the mapping relationship between the AISG interface and the electrical tilt unit according to the setting command, and saving the mapping relationship; and controlling the electrical tilt unit corresponding to the control equipment by the control equipment according to a control command of the control equipment and the saved mapping relationship between the AISG interface and the electrical tilt unit. With strong adaptability, the method and the equipment provided by the embodiment of the invention can realize flexible control of the electrical tilt unit through a base station or a portable hand-held control device.

The invention discloses a method for scanning equipment in an electrically adjustable antenna interface, which comprises that: a central control unit broadcasts an equipment scanning request message to each far-end control unit controlled by the central control unit, and receives an equipment scanning response message sent by a far-end control unit in a no-address state; and the central control unit allocates an address for the far-end control unit sending the equipment scanning response message. The invention also discloses a device and a system for scanning equipment in the electrically adjustable antenna interface. By adopting the scheme, the far-end control unit does not need performing unique identification code matching operation so as to shorten the time for scanning the far-end control unit by the central control unit.

The invention relates to a balance type radio frequency electronically-controlled band-pass filter with bandwidth control. The balance type radio frequency electronically-controlled band-pass filter with bandwidth control is composed of an upper layer micro-strip structure, an intermediate layer dielectric substrate and a lower layer grounded metal. Two input ports in the upper layer micro-strip structure are respectively connected with two input feed networks, and two output ports are respectively connected with two output feed networks. Two input feed networks are coupled with a first half-wavelength phrase step impedance resonator, a first half-wavelength phrase step impedance resonator is coupled with a second half-wavelength phrase step impedance resonator, finally the second half-wavelength phrase step impedance resonator is coupled with two output feed networks, and the whole filter structure is in a structure of longitudinal mirror symmetry. The balance type radio frequency electronically-controlled band-pass filter with bandwidth control achieves flexible bandwidth control, has the advantages of being high in common-mode rejection ration and wide in stop band and can be used for a reconfigurable radio frequency front end of the wireless communication or a radar system.

The invention concerns an electrically adjustable item of furniture having at least one electric drive motor, at least one control device for operating the drive motor, and a display unit, characterized in that the control device is able to encode operating status data into a status code, and the display device is capable of displaying the status code, so that this can be transmitted to an evaluation unit for servicing purposes. The invention moreover concerns methods for servicing an electrically adjustable item of furniture.

The embodiment of the invention provides an active-passive integrated antenna apparatus and a base station. The active-passive integrated antenna apparatus comprises an active antenna unit and a passive antenna unit. The active antenna unit includes: a first interface, which is used for receiving an active antenna signal and an electric modulation signal, sending the active antenna signal to an active antenna oscillator and sending the electric modulation signal to the passive antenna unit; and a passive antenna oscillator, which is used for transmitting a passive antenna signal. The passive antenna unit includes: a second interface, which is used for receiving a passive antenna signal and an electric modulation signal, sending the passive antenna signal to a passive antenna oscillator, and adjusting an antenna beam downward inclination angle in the passive antenna unit according to the electric modulation signal; and the passive antenna oscillator, which is used for transmitting the passive antenna signal. According to the apparatus and the base station, the active-passive integrated antenna structure can be simplified and electric modulation signal transmission reliability can be improved.

Threshold-based zero-crossing detection is provided. A power phase threshold detector detects when absolute value of a voltage level of the electrical power rises above a non-zero voltage threshold and outputs a zero-crossing signal to a controller to indicate occurrence of the zero-crossing. Delaying the zero-crossing signal to the point when the absolute value of the voltage level of the electrical power rises above the non-zero voltage threshold ensures completion of the zero-crossing of the power phase prior to signaling the controller. The controller provides signals to a switching circuit for controlling switching of electrical power to a load based on the zero-crossing indications.

The invention relates to the field of mobile communication base station antennae, in particular to a phase shifter applied to electric tilt base station antennae. The invention discloses a phase shifter module based on medium loading, comprising a transmission line structure which takes air as transmission medium and a basic transmission mode as a TEM model or a quasi-TEM model, such as strip lines or microstrip lines. The phase shifter module is characterized in that the phase shifter module also comprises at least one movable medium sheet arranged between transmission lines; according to the strip line structure, the medium sheet is also provided with a gap for arranging the strip line; along with the movement of the medium sheet, transmission lines and the medium sheet have relative displacement; and phase position delay is changed by changing the superposition area of the medium sheet and the transmission lines so as to realize signal phase shift. When the phase shifter works, the medium sheet moves vertically to energy transmission direction; by selecting medium material with low loss, the phase shift module has the advantages of low insertion loss, less spurious radiation, large phase shift amount, small volume, low cost and the like, and the phase shift amount and the medium sheet displacement are in linear relation; because of adopting modular design, the invention can be conveniently connected via the coaxial line, thus realizing flexible layout and diversified phase shift and feed network design.

The invention discloses a balanced type radio frequency voltage tunable bandpass filter with constant absolute bandwidth. The bandpass filter comprises a micro-band structure at an upper layer, a medium substrate at a middle layer and grounding metal at a lower layer. The micro-band structure at the upper layer adopts a balanced circuit and comprises four semi-wavelength resonators, two input feed networks, two output feed networks, two input ports and two output ports; each of the four semi-wavelength resonators comprises a micro-band line and a variable capacitance diode with two connected ends; capacitors are loaded at the middles of the first semi-wavelength resonator and the third semi-wavelength resonator; the second semi-wavelength resonator and the fourth semi-wavelength resonator are bent and arranged symmetrically; and the whole filter structure is in mirror symmetry. The balanced type radio frequency voltage tunable bandpass filter provided by the invention realizes constant absolute bandwidth during centre frequency tuning and can restrain common mode interference and can be used for a reconstructed radio frequency front end of wireless communication.

The invention is suitable for the technical scheme of communication, and provides a dual-polarized electricity tuning directional base station antenna and a communication base station. The dual-polarized electricity tuning directional base station antenna comprises a reflection board and a plurality of radiation vibrator components and a plurality of phase shifter networks which are arranged on two sides of the reflection board respectively and electrically connected with one another, wherein the phase shifter networks are connected with an electricity tuning transmission mechanism for adjusting phase differences of the phase shifter networks. The radiation vibrator components and the phase shifter networks are arranged on two sides of the reflection board and electrically connected with each other, and the electricity tuning transmission mechanism is used for adjusting phase differences of the phase shifter networks, so that an electronic downtilt angle of the base station antenna can be adjusted flexibly; a coverage region is changed, and the frequency range of the coverage region is 2,300 to 2,700 MHz, so that signal coverage is supplied to a wireless interoperability for microwave access and long time evolution (WIMAX / LTE) system; and therefore, the communication quality is guaranteed, and convenience is supplied to optimization, maintenance and management of the networks.

The invention discloses a phase shift driving device of an electric tiled antenna, which is used for shifting at least one phase shift component of a phase shifter in the electric tiled antenna so as to change the phase position of a signal. The driving device comprises an axially-limited drive rod and a transmission lever, wherein an operating part rotating around the circumference is arranged at the first end of the drive rod; the driving rod is axially arranged with the drive rod and axially moves under the action of the drive rod to drive at least one phase shift component of the phase shifter to synchronously move; the first end of the driving rod and the second end of the drive rod are in mutual threaded mesh and are movably connected; and the second end of the driving rod is linked with the phase shift component of the phase shifter. The driving device has the advantages of simple structure, normal driving work, stable operation, accurate phase position adjustment of the phase shifter and capability of well meeting the requirement of a mobile communication system.

The present invention provides an arc-arm phase shifter symmetrically arranged on both sides of an electric antenna, including an arc arm, a rotating arm and a feeder line. The two big and small arc arms are symmetrically arranged on two concentric circles, the circle center is the rotating point and the diameter ratio between the big arc arm and the small arc arm is 2:1. The rotating arm is suspended above the feeder line and the two arc arms, including a straight section and a cape section; one end of the cape section is connected in T shape with the symmetric center of the straight section and the other end of the cape section is connected in suspension with the feeder line in the rotating point; the two ends of the straight section of the rotating arm are respectively connected in T-shaped suspension with the two arc arms. The rotating point and the two ends of the rotating arm are located on a same straight line. The input terminal of the feeder line is connected with a feeder source and the four output terminals of the two arc arms are respectively connected with the radiation unit of antenna array. The present invention with simple structure and stable performance can effectively control and adjust the phase difference among radiation units of the antenna array and ensure the constant-power output on each output terminal.

The invention discloses a test device and method, which are used for testing performance of a system composed of a base station and user equipment (UE) under different simulated scenes. The test device comprises a channel simulator, a parameter configuration unit and an electrical control unit, wherein, the channel simulator is used for realizing a connection between the base station and the UE under the current simulated scene; the parameter configuration unit is used for configuring parameters related to the base station and the UE under the current simulated scene and determining attenuation amount of signals between the current base station and UE according to the parameters; and the electrical control unit is used for adjusting the attenuation amount of the signals between the base station and the UE by adjusting the voltage or current input to an electric control attenuator corresponding to a channel between the base station and the UE in the channel simulator according to the attenuation amount of the signals between the current base station and UE, thus achieving the purpose of testing the system performance corresponding to the current simulated scene.

The invention provides an electric adjusting power divider with a filter function. The entire circuit structure of the electric adjusting power divider is symmetric, and the power dividing ratio is 1:1. Two pairs of quarter-wave resonators which are coupled with each other form two filter networks, and the characteristic of band-pass filtering is achieved. The matching of three ports of a circuit and the isolating of two output ports of the circuit are achieved by resistors. According to an on-load variable capacitance diode, the electrical length of the resonators and the electrical length of a feeder line are adjusted by changing the on-load voltage of the on-load variable capacitance diode, and the purpose that the center frequency is adjustable is achieved. In addition, three transmission zeros are introduced by source load coupling, so that the electric adjusting power divider has high selectivity and is also good in stopband suppression effect.

The invention discloses a high-dynamic high-gain broadband receiver which comprises a radio frequency front end circuit, a multistage electronic speed controller attenuator circuit, a two-stage frequency mixing circuit and multistage gain amplifiers. The radio frequency front end circuit is mainly formed by a first-stage electronic speed controller attenuator, an LNA and a first-stage gain amplifier; the multistage electronic speed controller attenuator circuit is formed by electronic speed controller attenuators, integrating circuits, detection tubes and power dividers; the two-stage frequency mixing circuit is mainly formed by frequency mixers and local oscillators of two broadbands; the multistage gain amplifiers are formed by multiple gain amplifiers and are in cascade connection. The high-dynamic high-gain broadband receiver has the advantages that the high-gain dynamic range of the receiver can be achieved, the multistage frequency mixing circuit broadens radio frequency bandwidths, and the multistage gain amplifiers guarantee high gain; a pure analog circuit is adopted for the whole receiver link, digital interfaces are not needed, debugging is convenient to carry out, and work efficiency is improved; reliability of products is improved, fitness is high, and antijamming capability is high.

The invention discloses an antenna attitude monitoring system supporting an electric tuning function. The antenna attitude monitoring system is capable of monitoring a mechanical angel parameter of the antenna and uploading the tested data to a server of a network management center remotely, the server of the network management center controls an electric tuning device, and thus the electric inclined angle parameter of the antenna is adjusted. The antenna attitude monitoring system supporting the electrical adjusting function comprises antenna attitude sensors (1) mounted on each surface of the antenna, a control host computer (2) for managing connecting multiple groups of antennae, a branching lightning protection box (3) for connecting the antenna attitude sensors (1) with the control host computer (2), an electric tuning device (4) and a network management center server (5). A user obtains information relative to the antenna through website access and sends command to the control host computer (2) on request, the control host computer (2) controls the electric tuning device (4) which takes corresponding actions, and the antenna is tuned. The antenna attitude monitoring system can be used is the fields of base station antenna, communication pole and tower, electric power iron tower and the like.

The invention discloses a three-order electrical modulation band-pass filter with the constant bandwidth. The three-order electrical modulation band-pass filter with the constant bandwidth is high in selectivity, simple in electrical modulation control, smaller in overall size and capable of keeping absolute bandwidth fixation in the filter center frequency tunable process. According to the three-order electrical modulation band-pass filter with the constant bandwidth, an external Q value can be adjusted by adjusting a varactor loaded to a main transmission line, a uniform voltage feed is adopted for a first resonator, a second resonator and a third resonator, the restraint level outside a band at the low-frequency position can be flexibly adjusted by changing capacitance loaded to a band-stop unit, the three-order electrical modulation band-pass filter is easy to control, convenient to design and high in selectivity, and the absolute bandwidth keeps constant in the adjusting process; furthermore, on the premise of guaranteeing high selectivity and the harmonic wave suppression function, the design combining the band-stop unit and the band-pass filter is adopted, and thus the overall size of the filter is greatly reduced. The three-order electrical modulation band-pass filter with the constant bandwidth is suitable for being utilized and popularized in the technical field of filters.

The invention relates to a regulation apparatus for an electrically-regulated antenna. The regulation apparatus comprises a cavity with a hollow internal part, wherein a driving motor, a PCB control board main board and a threaded rod are arranged in the cavity; the PCB control board main board is connected with the driving motor; the driving motor and the threaded rod are in transmission connection; one end of the threaded rod extends to the exterior of one end of the cavity while the other end of the cavity is connected with an AISG connector; the AISG connector is provided with a PCB control board secondary board; the PCB control board secondary board is connected with the PCB control board main board; the threaded rod is long-columnar-shaped, and the cross section of the threaded rod comprises two parallel straight lines, and two circular arcs connected with the two ends of the straight lines respectively; the threaded rod parts corresponding to the circular arcs are provided with screw threads; and the thread screw parts corresponding to the straight lines are smooth planes. A control module, a transmission mechanism, the AISG connector and the like are designed in an integrated manner; and the influence, which is possibly generated by the control module, the driving motor and the motor connecting line, on the intermodulation of the antenna can be eliminated through an electromagnetic shielding effect of the cavity.

The invention discloses a miniature ultra wide band electrically tunable filter, characterized in that: a circuit structure comprises two impedance conversion units, N resonance units, (N-1) resonance coupling units and N resonance control voltage units; the impedance conversion units are placed at an input end and an output end of the circuit to realize impedance conversion, the (N-1) resonance coupling units connected in series are correspondingly connected with the N resonance units at two ends and two adjacent contact points, and the N resonance control voltage units are correspondingly connected with and control the N resonance units in order to realize different resonance points. The filter has the advantages of small volume, ultra wide band continuous electric tuning, high rectangular degree, narrow-band strobe and the like, and is extensively applied to interception, front-end of receiver and the like.

The invention relates to a radio remote unit of an electrically adjustable antenna, which is characterized in that the radio remote unit comprises a physical interface circuit, an intermediate frequency processing circuit, an A / D and D / A conversion circuit, a frequency conversion circuit, a synthesis / distribution network, a controllable phase shifter and a transceiving module, downlink signals sequentially pass through the physical interface circuit, the intermediate frequency processing circuit, the A / D and D / A conversion circuit, the frequency conversion circuit, the synthesis / distribution network, the controllable phase shifter an the transceiving module, and uplink signals sequentially pass through the transceiving module, the controllable phase shifter, the synthesis / distribution network, the frequency conversion circuit, the A / D and D / A conversion circuit, the intermediate frequency processing circuit and the physical interface circuit. The radio remote unit has the advantages of compact structure, simple installation, low power consumption and high performance. The invention further relates to the electrically adjustable antenna integrating the radio remote unit, which comprises the radio remote unit RRU and an antenna part and is characterized in that all or part of the functions of the radio remote unit RRU are integrated in the electrically adjustable antenna. The electrically adjustable antenna integrates all or part of the functions of the RRU, thereby leading the overall performance to be more excellent and leading the installation to be simpler.

The present invention is a tunable polarizer of optic fiber for long periodical optic fiber grating based on metal collar. The long periodical optic fiber is written on the of an optic fiber with high birefringence, and each peak of the resonation corresponding respectively to the fast and low axle using the effect of birefringence of the optic fiber, so that the effect of polarization is achieved at the wavelength of resonation. In addition, In order to improve the practicalness and flexibility of the polarizer, a metal resistant collar is disposed outside the coating of the polarizer and different values of direct current pass through the collar to change the temperature of the grating using the Joule heat produced by the current so as to achieve wavelength electrical tuning of the polarizer. Comparing it with the current conventional polarizer, the inserting loss is smaller, ratio of photo-extinction is higher, back-reflection is smaller and manufacture is easier.

The invention provides a liquid crystal electric control zero crossing scanning leaky-wave antenna based on half-mode pectinate line waveguide, belongs to the technical field of microwave antenna engineering, and solves problems that an electric control scanning leaky-wave antenna of conventional electrically controlled elements is difficult to work at a microwave high-frequency band. The liquid crystal electric control zero crossing scanning leaky-wave antenna comprises a top part dielectric plate layer, a metal layer, a liquid crystal layer and a bottom part waveguide slot. The metal layer is arranged between the top part dielectric plate layer and the bottom part waveguide slot. The bottom part waveguide slot has a longitudinal slot structure arranged at the upper surface of a rectangular plate. The liquid crystal layer is arranged in the longitudinal slot. The metal layer has a half-mode pectinate line waveguide structure. N periodic seam units are arranged between the column of pectinate teeth and the longitudinal edge of the opposite side of a rectangular waveguide frame in a rectangular waveguide frame area. The N periodic seam units include a group s longitudinal seam columns and a group of transverse seam columns. The transverse seam columns are arranged between the longitudinal seam columns and the pectinate teeth. Equivalent series inductance of electromagnetic wave is enabled to be increased by the periodic transverse seams and equivalent parallel induction is enabled to be increased by the periodic longitudinal seams when electromagnetic wave is transmitted between the bottom part waveguide slot and the metal layer.