1092 results about "Base station antennas" patented technology

This invention is in the field of base station antennas for wireless communications. The present invention refers to a slim multi-band antenna array for cellular base stations, which provides a reduced width of the base station antenna and minimizes the environmental and visual impact of a network of cellular base station antennas, in particular in mobile telephony and wireless service networks. A multiband antenna array comprises a first set of radiating elements operating at a first frequency band and a second set of radiating elements operating at a second frequency band, said radiating elements being smaller than λ / 2 or smaller than λ / 3, being (λ) the longest operating wavelength. The ratio between the largest and the smaller of said frequency bands is smaller than 2.

A duplex polarization adaptive system is described. The system provides polarization diversity for base station antennas under both receive and transmitting conditions. Since the base station provides polarization diversity in both transmit and receive modes, no polarization diversity is needed in the handheld unit. Even though the handheld unit does not provide polarization diversity, a duplex communication system, that uses polarization diversity for both the uplink and the downlink is provided, because the base station provides polarization diversity for the uplink and the downlink paths. By installing the two-way diversity at the base station, the overall cost of implementing diversity is reduced because one base station can typically serve many handsets. The base station antenna determines the polarization state of signals received from a remote unit, such as a handheld unit, using a polarization diverse antenna system. The base station then transmits using the same polarization state. The system is compatible with time-division duplex systems.

In a wireless communication network, base station antenna positions and time offsets are stored in a base station almanac data base along with other information used for obtaining the most reliable mobile station position fixes under a variety of conditions. The system uses the position fixes of mobile stations and terrestrial ranging information to determine base station antenna positions and base station timing offsets. The base station antenna positions are determined during normal mobile station position determinations, in order to maintain and improve the antenna location data, and to correct for change or relocation of the base station antennas. It is possible to recover quickly from a loss of cell sector identity during relocation of a base station antenna, and to ensure accuracy of mobile station position determination based on ranging from the base stations, and rapid acquisition of position data from mobile stations having global satellite receivers.

A communication system provides for adaptive rank determination, for example, a rank 2 transmission in instances where a rank 1 transmission may be indicated under supported feedback modes in current standards where no explicit power adaptation can be assumed, for example, where a user equipment (UE) is limited to reporting a rank 1 channel due to a large dynamic range of a signal or due to a signal received by the UE from one base station (BS) antenna port drowning out a signal received by the UE from another BS antenna port. The communication system provides for the UE to implement rank 2 transmission in such instances by using per-antenna port power control at a BS serving the UE. In one embodiment, the BS controls the rank determination at the UE by signaling transmit power or power offset related parameters to use for rank and transmission parameters determination and feedback.

In a mobile communication system, each base station is provided with an array antenna, a section for estimating the respective directions of one or more mobile stations with which the base station is in communication, based on estimated incoming directions of radio waves received from these mobile stations, and sections for operating on respective signals of the antenna elements constituting the array antenna such as to shape the radiation pattern of the antenna to form peaks of directivity which are oriented in the estimated directions of these mobile stations, and can include a capability for shaping these peaks in accordance with estimated positions of these mobile stations, thereby minimizing interference between transmissions from that base station and communication being executed between other adjacent stations of the system, and minimizing the number of different transmission frequencies required in the overall system.

Wireless mesh network communication apparatus and methods are disclosed. Directional antennas are respectively operatively coupled to dedicated communication devices to provide multiple independent wireless communication links. Exchange of communication traffic through the wireless communication links provided by the communication devices and the antennas is controlled by a switch. Any or all of the antennas may be adjustable so as to provide for flexibility in antenna beam alignment. Beam alignment may be physically or electronically adjustable. Radio units including the communication devices and the antennas, and possibly also the switch, may be enclosed in a single housing. The housing may be shared with other components such as wireless communication network base station antennas.

A dual-polarization wireless base station antenna that implements vertical electrical downtilt and sidelobe reduction using beam steering circuit that includes a variable power divider and a multi-beam beam forming network. The variable power divider includes a single adjustable control element to divide an input voltage signal into a pair of complimentary amplitude voltage drive signals that exhibit matched phase and constant phase delay through the variable power divider. The beam forming network is configured as a double-sided, edge-connected microstrip module mounted to a main panel, which support the antenna elements in a vertical column organized into sub-arrays in a manner that implements sidelobe reduction. The power distribution network connecting the beam steering network to the antenna elements implements beam tilt bias and sidelobe reduction through coordinated phase shifting implemented through transmission media trace length adjustment.

The present invention relates to a method for connecting a base station and a repeater for a spatial division multiple access, and a repeating method thereof. In order to provide efficient spatial division by using a repeater, data streams are repeated by using a repeating system including at least one repeater for performing wireless communication with a terminal located in a repeating region controlled by using at least one repeating antenna and a base station including a plurality of base station antennas corresponding to the repeating antenna. In this instance, the terminal detects location information on the repeating region to which the terminal belongs by using the pilot signal transmitted by the base station or repeated by the repeater. Location information detected by the terminal is fed back to the base station so that the base station may use it for the spatial division multiple access for simultaneous transmission to many terminals. Therefore, the spatial division multiple access for increasing sector capacity by efficiently combining the base station including multiple antennas and the repeater is available.

The number of users and data capacity of wireless systems are increased by employing apparatus and method for increasing the number of spreading codes available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes that may correlate to those already being used within the same sector / cell. This, in return, provides capacity improvement proportional to the number of added base station (BS) antennas for each cell. An antenna null steering technique for code allocation maintains the cross correlation properties of the codes only for the desired user and to obtain a gain in capacity improvement.

A method of controlling downlink transmissions to a subscriber station capable of communicating with a base station of an orthogonal frequency division multiplexing (OFDM) network. The method comprises the steps of: receiving a first pilot signal from a first base station antenna; receiving a second pilot signal from a second base station antenna; and estimating the channel between the base station and subscriber station based on the received first and second pilot signals. The method also comprises determining a set of OFDM symbol processing parameters based on the step of estimating the channel and transmitting the OFDM symbol processing parameters to the base station. The base station uses the OFDM symbol processing parameters to control the relative gains and the relative delays of OFDM symbols transmitted from the first and second antennas.

The invention discloses a capacity expansion method for a wireless communication network. N sectors are split into 2*N sectors according to network requirements of the sectors based on conventional three sectors, wherein N is more than or equal to 1; the conventional sectors are replaced by the split subsectors; the capacity is expanded by using spectrum reuse; and therefore, the interference caused by spectrum reuse in the capacity expansion of the wireless mobile communication network can be effectively solved so as to provide a new idea for the capacity expansion of the network. Compared with a cellular splitting mode, the method greatly saves the construction cost of the base station and reduces the cost of the capacity expansion of the network when used for expanding the capacity of the network.

A method and apparatus is disclosed herein for employing pilot-reuse for training in the downlink of a wireless communication network. In one embodiment, the method comprises coordinating assignment of pilot codes across base stations in the topology and coordinating assignment of codes across base station-user terminal pairs, including assigning, from a set of pilot codes, a subset of codes to each cell in the topology, and assigning codes in each subset of codes to user terminals in said each cell based on cell dependent criteria; receiving waveforms from user terminals transmitting their assigned pilots; obtaining channel estimate information for channels between base station antennas and user terminals to which the base station is transmitting, the channel estimates based on the received waveforms; and transmitting to user terminals based on the channel estimate information.

The invention discloses a planar-broadband dual-polarization base station antenna and belongs to the field of mobile communication base station antennae. The planar-broadband dual-polarization base station antenna mainly solves the problems that an existing base station antenna is complex in structure and has difficulty in being integrated with other devices. The planar-broadband dual-polarization base station antenna comprises radiation oscillators (1), feed baluns (2), a baffle board (3), coaxial cables (4), supporting columns (5) and a dielectric material plate (6). The radiation oscillators (1) are dual-polarization planar oscillators at + / -45 degrees, and the feed baluns (2) are planar feed baluns at + / -45 degrees. The radiation oscillator at -45 degrees and the feed balun at +45 degrees are printed on the upper surface of the dielectric material plate (6), and the radiation oscillator at +45 degrees and the feed balun at -45 degrees are printed on the lower surface of the dielectric material plate (6). The dielectric material plate (6) is fixed to the square baffle board (3) through the supporting columns (5). According to the planar-broadband dual-polarization base station antenna, planarization of the radiation oscillators and the feed baluns are achieved, meanwhile, the structure of the baffle board is simplified, and a stable directional diagram characteristic can be obtained in broadband.

An ultra-wideband dual-band cellular basestation antenna is disclosed. Ultra-wideband dual-band cellular dual-polarisation base-station antennas and low-band radiators for such antennas are disclosed. The low-band radiator comprises a dipole and an extended dipole con figured in a crossed arrangement, a capacitively coupled feed connecting the extended dipole to an antenna feed, and a pair of auxiliary radiating elements. The dipole comprises two dipole arms, each of approximately [lambda] / 4, for connection to the antenna feed. The extended dipole has anti-resonant dipole arms of approximately [lambda] / 2. The auxiliary radiating elements are configured in parallel at opposite ends of the extended dipole. The radiator is adapted for the frequency range of 698-960 MHz and provides a horizontal beamwidth of approximately 65 degrees. The dual-band base-station antenna comprises high-band radiators configured in at least one array and low-band radiators interspersed amongst the high-band radiators at regular intervals.

The invention relates to a base station antenna, that includes two or more reflector plates, each provided with a radiating element. The base station antenna also includes a reflector plate connecting member connected to each reflector plate for enabling the rotation of the reflector plates. The base station antenna also includes a reflector plate controller providing control signals for controlling the rotation and stoppage of the reflector plates.

This invention discloses a method of mobile positioning, including: A. the network side obtains the credibility of the measurement data form different base-station antennas in the station-sites. B. According to the results, it selects the data with the highest credibility and obtains the arrival angles of mobiles in different base stations according to the data. C. According to selected measurement data, the corresponding credibility and the obtained angles, it gets the mobile location information.

A reconfigurable base station (BS) antenna permits increasing cell capacity by dynamically varying an antenna's configuration according to a wave propagation environment and subscriber distribution. At least two reflective plates each have at least one radiator, a ray dome accommodates the two reflective plates in a hollow interior, and upper and lower caps are combined with upper and lower portions of the ray dome, respectively. Reflective connection members are connected to the respective two reflective plates and the upper and lower caps, so that the two reflective plates are rotatable, and at least one force generator provides a rotation force, and at least one force transfer mechanical portion transfers the rotation force received from the force generator to at least one reflective plate and controls a rotation angle of the at least one reflective plate. At least one of the force generator and the force transfer mechanical portion is combined with the two reflective plates.

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for scheduling a terminal in a wireless communication system permitting overlapping between base station clusters, and an apparatus therefor, the method comprising the steps of: grouping a plurality of terminals into a plurality of groups satisfying predetermined conditions; and selecting one more terminals for scheduling by means of a group-based greedy algorithm for each of the plurality of groups, wherein, in the group-based greedy algorithm, a check is skipped for whether the total number of base station antennas corresponding to each group is equal to or greater than the number of terminals selected from each group.

The invention discloses a low-profile dual-polarized base station antenna for solving the problems of high profile and large reflector size of the existing base station antenna. The low-profile dual-polarized base station antenna comprises a + / -45 DEG dual-polarized planar vibrator (1), a + / -45 DEG planar feed probe (2), an artificial magnetic conductor reflector (3), a coaxial line (4), a strut (5) and a dielectric material plate (6); the + / -45 DEG planar feed probe is printed on the upper surface of the dielectric material plate (6), and a -45 DEG planar feed probe and the + / -45 DEG dual-polarized planar vibrator are printed on the lower surface of the dielectric material plate (6); the dielectric material plate (6) is fixed above the artificial magnetic conductor reflector (3) via the strut (5), and the artificial magnetic conductor reflector (3) comprises a reflector dielectric plate (31), a square patch (32) and a floor (33); and the coaxial line (4) is used for exciting the antenna. The low-profile dual-polarized base station antenna has the characteristics of low profile and small reflector size, and is suitable for serving as a mobile communication base station antenna.

The invention relates to a broadband dual-polarized mobile base station antenna unit equipped with metallic pillars and belongs to the technical field of mobile communication base station design and manufacture. The antenna unit successively comprises, from top to bottom, a feed structure, a dielectric slab, a butterfly-shaped radiation structure, short metallic pillars, a coaxial line, plastic support column, and a metallic reflecting plate. The feed structure and the butterfly-shaped radiation structure are arranged on the upper surface and the lower surface of the dielectric slab in the same placed direction, respectively. The short metallic pillars cling to the butterfly-shaped radiation structure. The butterfly-shaped radiation structure is fixed to the metallic reflecting plate through the four plastic support columns. The coaxial line passes through the metallic reflecting plate. The inner core of the coaxial line is connected with the feed structure and the outer core of the coaxial line is connected with the butterfly-shaped radiation structure. The antenna unit has characteristics of a broad band, high isolation, low cross polarization, compact structure, and low cost, complies with the development tendency of current base station antennas, and has good practical value.

The invention discloses a base station antenna that is applied to an international mobile telecommunication-advanced (IMT-Advanced) system of a fourth generation wireless mobile communication system. The antenna unit employs a mode of multi-layer microstrip paster antenna and a basic structure of the antenna comprises a metal reflecting plate, a microstrip feeding layer, two radiating layers and a plurality of nylon insulating columns. The greatest innovation of the invention lies in an ultrabroad band characteristic of the antenna; a novel arrowhead coupling feeding groove and a double-layer radiation patch are employed; and a bandwidth can reach 49.5% on the condition that a standing-wave ratio is less than 1.5. On the basis of a reasonable design of a reflecting plate, a half-power lobe width of the antenna is a value caused by adding 6 degrees to 65 degrees or by subtracting 6 degrees from 65 degrees in a whole working frequency band range; and a convergence degree of a wave beam of the antenna has a good performance. According to the invention, a corner feeding mode is employed to carry out feeding and a dual polarization with plus / minus 45 degrees is realized on the condition that it is avoided that a radiation patch is rotated by 45 degrees, so that it is beneficial to reduce a whole length of an antenna array after arrangement of the array. On the basis of the basic structure that is based on the technical scheme of the invention, other concrete embodiments of the invention can be constructed only by reasonably changing a size of a radiation patch, a shape of a slotted floor and spaces between all layers.

A mobile communication base station antenna has a plurality of array antennas. Each of the array antennas has an antenna element pair array including a plurality of antenna element pairs arranged in a vertical plane. Each of the antenna element pairs has two antenna elements having polarization characteristics orthogonal to each other. Two feeding points are provided for feeding an electric power to the two antenna elements respectively. The array antennas are arranged in a vertical plane, and the antenna element pairs included in one of the array antennas and the antenna element pairs included in other of the array antennas are arranged alternately, at least in a part between the array antennas adjacent to each other.

The invention discloses an antenna array module. More than two antenna units are arranged on a surface, which two power division circuits are arranged, of a feeding network circuit board, a filter isarranged on a surface, which two coupling circuits are arranged, of the feeding network circuit board, each power division circuit is provided with an input end and a plurality of output ends, the plurality of output ends of one of the power division circuits is used for performing polarization feeding on one of the antenna units at -45 degrees, the plurality of output ends of the other power division circuit are used for performing polarization feeding on one of the antenna units at +45 degrees, each coupling circuit is provided with a radio frequency input end and an output end, the output end of each coupling circuit is electrically connected with the input end of one of power division circuits, the filter is at least provided with two output ends, and the two output ends of the filterare electrically connected with the radio frequency input end of one of the coupling circuits. The invention also discloses a base station antenna. Integration and modularization are achieved, the expansibility is improved, an installation structure and a connection structure are simple, the antenna array module is easy to debug and maintain subsequently, and the manufacturing cost and the application cost are reduced.

An antenna assembly for emitting a signal. The antenna assembly includes at least two antennas which are separated into a first group and a second group. Both groups of antennas are mounted on a panel. A first phase adjuster is coupled to the first antenna group. The first phase adjuster is also coupled to a second phase adjuster, which is also coupled to said second antenna group. The first phase adjuster is coupled to the second phase adjuster, such that an adjustment of the first phase adjuster causes an adjustment of the second phase adjuster. The first phase adjuster is adapted to adjust a phase angle of the signal of the first antenna group, while the second phase adjuster is adapted to adjust a phase angle of the signal of said second antenna group.

In the method provided, test transmissions between the mobile user terminal and base station antennas are made, and the received test transmissions processed to determine respective signal path quality for each of the base station antennas. Upon the determined signal path quality exceeding a first predetermined threshold, but being less than a second predetermined threshold higher than the first predetermined threshold, the mobile user terminal is connected to the corresponding base station antenna by control channels but not data channels so as to be time synchronised. Upon the determined signal path quality exceeding the second predetermined threshold, the mobile user terminal is connected to the corresponding base station antenna by both control channels and data channels so as to be call connected.

Embodiments of the invention relate to the communication technology field and provide a base station antenna and a base station antenna feed network. The base station antenna comprises a transceiver array, a first-level vector synthesis network, a two-level phase shift array, a second-level vector synthesis network and an antenna unit array. By means of the second-level vector synthesis network, the base station antenna makes smoother the phase difference of multiple vector signals that are transmitted to an antenna unit, thereby increasing the range of adjusting a downward inclination angle of the antenna on the premise that the number of transceivers is as small as possible.

The invention discloses a PVC profile outer cover used in a base station antenna and a preparation method thereof, which can not only improve the mechanical property, but also greatly improve high and low temperature resistant ageing property and ultraviolet ray resistant property, and greatly improve the electrical property of the material simultaneously. The PVC profile outer cover used in the base station antenna in the invention is manufactured by the following raw materials according to the mass ratio: 100 parts of PVC, 4-10 parts of inorganic modified padding, 0-10 parts of calcium carbonate, 1-2 parts of organic stannum stabilizing agent; 1-2 parts of metal soap stabilizing agent, 0.5-1.5 parts of lubricating agent, 4-12 parts of impact modifier, 1-3 parts of acrylic ester processing agent and 0-0.6 part of light stabilizer.