733 results about "Antenna feeder" patented technology

An RF front-end apparatus in a TDD wireless communication system is provided. In the RF front-end apparatus, a detector is provided at a predetermined position in a signal path, and detects a signal propagating in the signal path. A circulator provides a signal received from a power amplifier to an antenna feed line and a signal received from the antenna feed line to a switch. A switch controller generates a control signal based on the signal received from the detector and a switch on/off signal received from a control board. The switch, which is disposed at an input port of an LNA, switches on/off according to the control signal received from the switch controller.

A transmitting apparatus in a TDD wireless communication system is provided. In the transmitting apparatus, a circulator transmits a signal received from a power amplifier to an antenna feed line and transmits a signal received from the antenna feed line to a quarter-wave transmission line. The quarter-wave transmission line is installed in a reception path, for reception isolation in a transmission mode. An RF switch shorts the load of the quarter-wave transmission line to the ground or connects the load of the quarter-wave transmission line to an LNA according to a control signal. The LNA low-noise-amplifies a signal received from the RF switch.

An antenna comprises: a main reflector being a body of revolution of arbitrary curve which axis diverges from axis of the revolution; a sub-reflector being a body of the revolution of arbitrary curve along the axis of revolution, having a circle and a vertex pointing to the main reflector and being placed between the circle and the main reflector; a radiator being located along the axis of revolution and being placed between the main reflector and the sub-reflector; and wherein the main reflector and the sub-reflector are: $z_m\left(r,D\right)=\sum _{n=0}^4\sum _{m=0}^6{\mathrm{qm}}_{n,m}{D}^{m-n+1}{r}^n,z_s\left(r,D\right)=\sum _{n=0}^4\sum _{m=0}^6{\mathrm{qs}}_{n,m}{D}^{m-n+1}{r}^n,$

z, r are coordinates of the main reflector and the sub-reflector measured in millimeters, Index m corresponds to the main reflector, index s to the sub-reflector D is the main reflector diameter measured in millimeters.

A system for sending uplink control signals to antennas and receiving downlink signals therefrom, where the uplink signals may be used to control antenna position and operate antenna switches and the like, and the downlink signals may indicate antenna position, the uplink signals being in the form of digital signals having two voltage levels within the range of a DC supply superimposed on the RF signals on the antenna feeder, and the downlink signals being digital signals in the form of changes in the DC current on the feeder, generated by a load having two resistance values.

An antenna device, a base station system, and a method for tuning the antenna device are provided in the embodiments of the present invention. The antenna device includes: a first antenna; a second antenna sharing a shield with the first antenna and having a different polarization direction; a control apparatus for receiving an electric tuning control signal for the first antenna and/or an electric tuning control signal for the second antenna, and according to the electric tuning control signal for the first antenna, tuning a down tilt angle of the first antenna and/or according to the electric tuning control signal for the second antenna, tuning a down tilt angle of the second antenna. Unlike the traditional double polarized antenna, in which one down tilt angle must be shared, the embodiments of the present invention may respectively tune the down tilt angles of two groups of antenna elements that constitute a shield-sharing double polarized antenna, thus may support different frequency bands or different systems in one frequency band to adopt different down tilt angles. Only one double polarized antenna is needed without additional antenna feeder, thus the cost of the device is decreased.

The invention provides a foundation-based atmosphere profile microwave detector. The detector is characterized by comprising an antenna feeder unit, a radiometer receiving unit and a scanning mechanism unit, wherein the antenna feeder unit comprises two independent antenna feeder sub-units for two wavebands and is provided with two-frequency independent reflective surfaces; the two independent antenna reflective surfaces are arranged at two ends of the output shaft of a scanning motor respectively, can realize beam scanning through motor rotation, and are used for receiving microwave radiation of atmosphere and an internal calibration reference source; the radiometer receiving unit comprises a directional coupler, a radio amplifier, a power divider, a band pass filter, a square law detector, an integrator and a video amplifier, and is used for realizing intermediate frequency detection of a received signal; the scanning mechanism unit comprises a scanning shaft, a scanning step motor, two front ends and a sub-miniature type A (SMA) connector; and driven by the scanning motor, the scanning shaft drives the two reflective surfaces to circumferentially scan so as to realize observation on sky in different incident angles and measurement on an internal calibration blackbody and acquire data which is acquired in a measurement and periodic internal calibration unit.

The invention provides a system and method for controlling a satellite finding antenna. The system comprises an antenna feeder subsystem for receiving a beacon signal of a target satellite, a satellite communication subsystem for converting the beacon signal to the beacon signal of L wave band, a servo control subsystem for determining the angle adjustment information of the antenna according to the current angle information of the position of the target satellite and the antenna during first alignment of the antenna and determining the angle adjustment information of the antenna according to the converted beacon signal when judging that the angle of the antenna is changed, and an antenna driving subsystem for driving the antenna to direct the target satellite according to the angle adjustment information. In the invention, the angle adjustment information of the antenna is determined according to the beacon signal of the target satellite during angle change after antenna alignment so as to drive the antenna to be aligned to the target satellite according to the angle adjustment information to realize the automatic satellitet of alignment program, ensure that the antenna is capable of being aligned to the satellite at any moment and improve the working efficiency.

An antenna diversity system for radio reception for motor vehicles, which comprises a multi-antenna system having several antennas with antenna feed lines. There can be a diversity switching device for selection of a different reception signal, and an evaluation circuit which evaluates the reception quality of the reception signal just arriving at the receiver. This evaluation circuit is designed to bring a different reception signal in terms of diversity to the receiver if interference occurs, by switching over. This design also includes at least one phase rotation device which is disposed along at least one of the signal paths.

The invention discloses a mobile terminal base station differential positioning method. The method comprises the steps that a positioning device acquires one or more pieces of base station differential information matching a positioning request from a base station differential information database; the signal propagation time from a mobile terminal to a number of base stations, the signal propagation time difference of a number of base stations, or the signal intensity correction value of each base station is calculated; the positioning device uses the correction value to respectively correct each parameter; and the positioning device calculates the positioning information of the mobile terminal according to the corrected parameters. According to the mobile terminal base station differential positioning method, the positioning device and the system, which are provided by the invention, the multi base station information of one or more known positions is used to carry out differential correction on the multi base station information of an unknown position; a static error caused by dynamic errors of base station signal drift and the like and antenna feeder length and the like is eliminated; the positioning accuracy is improved; and a common terminal can be used to automatically collect differential data, which is convenient for implementation.

The invention relates to the technical field of communication, specifically to an antenna parameter optimizing method based on mobile phone measurement report, which is characterized in that the method comprises a wireless network basic data management sub-system, a mobile phone reported data locating sub-system, a wireless network covering emulating sub-system, an antenna feeder parameter automatic optimizing sub-system and a hardware configuring system; the basic data management sub-system stores and manages the wireless network basic data, including electronic map, the project parameter of the whole network and the mobile phone measuring report data; the mobile phone reported data locating sub-system can locate the original mobile phone reported data; the wireless network covering emulating sub-system can locate the result data according to the wireless network basic data, the electronic map and the mobile phone reported data; and the antenna feeder parameter automatic optimizing sub-system solves the problem of uncompleted wireless network covering and uneven telephone traffic distribution. The an antenna parameter optimizing method based on mobile phone measurement report can reduce workload, enlarge application scope and reduce manpower input and cost along with more accurate assessment.

The invention discloses a position detection method and device for a fault of a cable. The method includes: transmitting swept-frequency signals, obtaining reflection coefficients at a group of frequencies through calculation; obtaining a relation between the reflection coefficients and positions of the cable or a relation between standing-wave ratios and the positions of the cable through calculation according to the reflection coefficients corresponding to the group of frequencies; comparing the reflection coefficients or the standing-wave ratios with preset threshold values and if one specific reflection coefficient or one specific standing-wave ratio is larger than a corresponding threshold value, a position of the cable, corresponding to the reflection coefficient or the standing-wave ratio is a fault point of the cable. The position detection method and device for the fault of the cable does not require adding of a hardware device or location of the fault through an instrument carried by detecting personnel and a breakpoint or a fault position of a cable between a device and an antenna feeder can be detected only through a soft procedure so that cost is reduced greatly, fault-diagnosing efficiency is improved and self-diagnosing function of the device is realized.

The invention discloses an antenna feeder tester and an extending device error correction method by using the antenna feeder tester. The antenna feeder tester comprises a signal synthesis module, a power divider, a directional coupler, a test port, an amplitude and phase receiver module, an FPGA digital intermediate frequency processor and a CPU controller, wherein the signal synthesis module comprises an excitation signal source and a local vibration signal source; and the amplitude and phase receiver module comprises an R channel and an A channel, and one A/D conversion module is arranged behind each of the R channel and the A channel. During measurement, after correction is finished at the test port of the instrument, the antenna feeder tester of the invention is then used to measure transmission parameters of an extending device in the case when the extending device is connected, the transmission parameters of the extending device are used for correcting test data when the extending device is connected with a tested piece according to a theoretical loss formula of a cable, correction does not need to be carried out again, and the measurement precision and the test efficiency are thus improved.

The invention provides a vehicular millimeter-wave train collision avoidance radar system which comprises a frequency synthesizer module, a transmitting module, a receiving module, an antenna feeder module, and a signal processing module. The frequency synthesizer module is used for generating X-band transmitting excitation signals and X-band receiving local oscillator signals. The transmitting module is used for doubling the frequency of the X-band transmitting excitation signals to Ka band. The antenna feeder module comprises a transmitting antenna, Kn receiving antennas and n single-pole K-throw switches. Each two adjacent K receiving antennas are connected with the receiving module through one single-pole K-throw switch. The receiving module comprises n receivers. Each receiver is connected with one single-pole K-throw switch in the antenna feeder module. The signal processing module is used for processing the received signals to obtain the distance, speed and angular information of a target, and transmitting the information to a train central control system. The train central control system issues stop commands to trains. The vehicular millimeter-wave train collision avoidance radar system is installed on the train and is capable of accurately detecting obstacles in front of the train to well functionally avoid train collision.

The invention discloses a method and a system for optimizing antenna feeder parameters, which are used for joint automated optimization of a plurality of antenna feeder parameters in a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) network, ensuring a whole optimization effect and improving wireless network quality. The optimization method comprises the following steps of: simulating a wireless network environment on the basis of wireless network base data and road test data, and positioning a coverage and interference problem region in the wireless network environment according to the road test data; selecting a problem cell in a plurality of cells included in the positioned coverage and interference problem region, and adjusting each antenna feeder parameter according to the preset optimal condition; and assessing a preset network coverage and interference index on the basis of current adjustment for each antenna feeder parameter, and when an assessed value of the network coverage and interference index in the coverage and interference problem region reaches an expected target value, the optimization of the antenna feeder parameters can be carried out according to the adjusted antenna feeder parameters.

The embodiment of the invention discloses a method for detecting cells with reversely-connected antenna feeder equipment, which belongs to the field of wireless communication. The method comprises the steps of: acquiring dominant set RTWP values and diversity RTWP values of various cell antennas of a base station in a time period to be detected; calculating the related coefficient of the dominant set RTWP value and the diversity RTWP value of each cell; and determining cells that dominant sets and diversities of antenna feeder equipment are reversely connected according to the related coefficients of the dominant set RTWP values and the diversity RTWP values obtained through the calculation. The method also comprises the steps of: acquiring optimization data and soft handover information of same-frequency neighbor cells of the cells of the base station in the time period to be detected; acquiring optimum cells according to the reporting times of a 1A event and a preset acquisition threshold; acquiring a current cell in the optimum cells; and determining cells which are reversely connected compared with the current cell according to the soft handover times between the current cell and various cells of positive neighbor cell sets thereof and the soft handover times between the current cell and various cells of positive neighbor cell sets of same-frequency co-station cells thereof. The method can automatically realize the detection of the reversely-connected antenna feeder equipment, reduce road test cost, and improve work efficiency.

The invention relates to an antenna-feeder centralized monitoring device and a relative control method, in particular to a method for testing and monitoring an antenna-feeder system. The device comprises monitoring stations, a communication module, a wireless communication system, a communication network, a computer and a monitoring center, wherein the monitoring center centralized monitors the monitoring stations, which are communicated and controlled wirelessly with the monitoring center, thereby resolving the centralized management of the monitoring stations. The invention has the advantages that the monitoring center can centralized manage the monitoring stations and adopt control software to monitor the monitoring station group and automatically receive the alarm data from the base stations. The automatic antenna-feeder monitoring system can save labor strength of maintainers, having automatic monitoring, automatic alarm and automatic antenna-feeder change analysis functions and the like.

The invention relates to mobile communication field, in particular to a technology for detecting performance of antenna feeder system. The invention provides an antenna feeder system performance test method and a device thereof. The method comprises: obtaining actual power of a mobile terminal in receiving signals; comparing the actual power with the power threshold value of the mobile terminal in receiving signals, and confirming the performance of the antenna feeder system, wherein the signal receiving power threshold is confirmed according to the carrier wave transmitting power and the carrier wave space transmission loss of the signals. As the anticipated power value of the mobile terminal in receiving signals can be measured and calculated according to the signal carrier wave generation power, signal gain and loss in carrier wave transmission process, and the anticipated power value and the signal receiving actual power value reported by the mobile terminal can be compared, in the process of confirming antenna feeder system performance, a test person only needs to carry with a common mobile terminal to finish test on antenna feeder system performance, thus saving labor and material, and improving efficiency in testing antenna feeder system performance.

The invention provides an intermodulation distortion testing method of a high-power device. The intermodulation distortion testing method of the high-power device comprises the steps that (1) a testing device, a first power amplifier, a second power amplifier and a network analyzer are connected with a tested part, (2) passive intermodulation or active intermodulation of the tested part is tested, (3) the network analyzer displays the intermodulation testing result, when passive intermodulation is carried out, a transmission PIM test result and an emission PIM test result are displayed at the same time, and when active intermodulation is carried out, the dual-tone signal power and the IM power of a tested amplifier are displayed at the same time. According to the scheme, a system formed by a device can be used for measuring the passive intermodulation characteristics of passive microwave device components, antennas and antenna feeder systems, and the active intermodulation characteristics of high-power amplifiers, and complete intermodulation distortion testing is provided for a communication system.

An antenna comprises: a main reflector being a body of revolution of parabolic shape; a sub-reflector being a body of the revolution of elliptic shape having a circle and a vertex oriented to the main reflector and being placed between the circle and the main reflector, one focal point of the sub-reflector being placed on the axis of revolution and the other focal point of the sub-reflector being placed out of the axis, the sub-reflector circle being placed in the plane of the main reflector edge circle; a radiator being placed along the axis of revolution of the main reflector and being placed between the main reflector and the sub-reflector; and wherein the sub-reflector has eccentricity ranging from 0.55 to 0.75

The invention discloses an indoor distribution system antenna feeder monitoring method. The indoor distribution system antenna feeder monitoring method comprises information source equipment and an antenna feed system, wherein the antenna feed system is connected with at least one antenna feed monitoring terminal, and the information source equipment is connected with an equipment monitoring relay. The antenna feed monitoring terminal and the equipment monitoring relay are connected with each other through the antenna feed system, and the equipment monitoring relay is further connected with a monitoring center platform. The antenna feed monitoring terminal collects a signal level at an antenna position of the antenna feed system and then conveys the collected signal level to the equipment monitoring relay through the antenna feed system in a carrier wave mode. The equipment monitoring relay transmits self-sampled signal level data and signal level data of the antenna feed monitoring terminal to the monitoring center platform. The monitoring center platform conducts statistic analysis and logical operation respectively to the signal level data collected by the equipment monitoring relay and the antenna feed monitoring terminal, so that whether the signal levels of the information source equipment, each antenna feeder and each antenna port of an indoor distribution system are normal can be obtained, or the failure type and the failure range can be obtained.

The invention relates to an ultra-wideband millimeter-wave linearly-polarized waveguide aperture array antenna, belonging to the technical field of microwave detection. In the waveguide aperture array antenna, a multi-power-dividing feed network is combined with a waveguide aperture radiation array, and an antenna is simulated and designed by applying the thought of integral design of an antenna feeder system. By changing the amplitude of each port of an HT power divider network, the characteristics of low standing wave, high grain, low minor lobe and wide wave beam are realized, an ultra-large frequency bandwidth is realized, and the ratio of the frequency bandwidth to the central frequency is up to 6.6 percent. On the aspect of structure, the entire antenna comprises a bottom plate, a feed network and a radiation portion, thereby greatly reducing the workload of simulation and machining, reducing the processing error to the maximum extend, reducing the size and weight of the antenna, and achieving adaptation to various occasions and experiments. The antenna is capable of receiving/transmitting signals at the same time, is suitable for Ka waveband communication and detection, and is suitable to be applied to communication systems, navigation systems and radar systems of various fixed and movable platforms.

An embodiment of the invention provides a passive intermodulation detection method and device. The device comprises a signal source input end, a duplexer, a frequency doubler, a mixer and a detector, the signal source input end is used for inputting at least two times of test signals with different frequencies, the duplexer is used for sending each test signal to an antenna feeder system and receiving harmonic signals which correspond to each test signal and are fed back by the antenna feeder system, the frequency doubler is used for conducting frequency doubling treatment on each test signal and obtaining frequency doubling signals of the test signals, the mixer is used for conducting frequency mixing treatment on the frequency doubling signals of the test signals and corresponding harmonic signals and obtaining frequency mixing signals, and the detector is used for obtaining a personal information management (PIM) testing result of the antenna feeder system according to the frequency mixing signals of each test signal. The embodiment only needs to send one frequency signal at one time, frequencies of the harmonic signals and the testing signals are far away, frequency spaces between sending signals and receiving signals of a PIM detecting device are big, requirements for the duplexer are reduced, size and weight are reduced, and cost is lowered.

The invention relates to a substrate integrated waveguide multiple beam antenna based on the Lotman lens principle. A substrate integrated waveguide similar to a waveguide structure is realized through an upper layer metal copper-clad surface (1), a lower layer metal copper-clad surface (2) and metalized pylomes (4) on a medium substrate (3), and a multiple beam antenna is formed; the structure of the multiple beam antenna is divided into three parts that: the first part is a substrate integrated waveguide Lotman lens (53); the second part is a substrate integrated waveguide dephasing network (8); the third part is a radiation antenna array (91), wherein, the first part is directly cascaded with the second part; and the second part is directly cascaded with the third part. The antenna is suitable for a microwave millimeter wave beam shaping network and a multiple beam antenna feeder system; the substrate integrated waveguide multiple beam antenna formed by the antennas can be applied to a microwave millimeter wave multiple beam system and an intelligent antenna, and has the advantages of improving the quality of a communication channel, reducing the sending power, bit error rate and multipath interference, etc.