38 results about "Many antennas" patented technology

A leaky-wave antenna capable of multi-plane scanning is provided. The leaky-wave antenna includes a substrate, a first antenna series, a second antenna series and a plurality of control units. The first antenna series intersects with the second antenna series to share a predetermined antenna unit among many antenna units. A part of the antenna units is connected in series to extend from a first and a second transmission lines of the predetermined antenna unit to compose the first antenna series, and the other antenna units are connected in series to extend from a third and a fourth transmission lines of the predetermined antenna unit to compose the second antenna series. The control units control the transmission paths between the first to the fourth transmission lines and the antenna units, and switch a leaky beam to different scanning planes, wherein the leaky beam scans with frequency variation through the antenna units.

A compact and low-cost antenna device in which no interference occurs even when many antenna units corresponding to various systems are mounted close together in a small area, and a wireless communication apparatus including the antenna device. An antenna device includes plural antenna units mounted on a single dielectric base. A first antenna unit having a lowest fundamental frequency is disposed at a left end of a non-ground region, a second antenna unit having a highest fundamental frequency of the plurality of the antenna units is disposed at a right end of the non-ground region, and a third antenna unit having a fundamental frequency between those of the first antenna unit and the second antenna unit is disposed between the first and second antenna units. A current-density control coil is connected between a first radiation electrode and a power feeder of the first antenna unit, while a reactance circuit is disposed in the middle of the first radiation electrode. Notches may be disposed between the first radiation electrode and a second radiation electrode and between the first radiation electrode and a third radiation electrode.

The present invention relates to an integrated RFID card holder, cage, lid or rack and system for collecting census, inventorying, and tracking of animal cages, lids, card holders, racks, and other related equipment. Preferably, the card holder is comprised of an RF transparent material such as plastic. During operation, a RFID reader reads each integrated RFID card holder attached to an animal cage for virtually linking the cage to an animal rack in effect assigning a parking spot to each animal cage within an animal cage rack system. The integrated RFID card holder can be determined to be in a room when the Received Signal Strength Indicator (RSSI) is the highest comparing multiple reads from one or many antennas.

Apparatus and process for determining the position and heading or attitude of an antenna array are described based on radiating sources, preferably GNSS or other such satellite positioning systems. An optimum satellite is selected and the antenna array is “null steered” by combining the phase of the received signals to calculate a null or null angle that points toward the optimum satellite. The null will determine angle for elevation toward the optimum satellite and azimuth or heading. The heading is the azimuth of the (which may be actual or calculated) projection of the null vector to the satellite onto the Earth's surface. The actual location on Earth of the antenna array can be found and the antenna array azimuth with respect to the satellite can be determined. The null angle may be measured more precisely by dithering on either side to average out noise and then averaging the angle deviations to calculate the null angle. If the attitude of the antenna array with respect to the Earth's surface is desired, a null vector to a second satellite may be generated and the intersection of the two nulls will allow the attitude of the antenna array, with respect to one or both of the satellites, to be determined. The difference between the measured attitude of the antenna array with respect to the null vector and the calculated attitude of the satellite from the GNSS signals, is the attitude of the array with respect to the Earth's surface. All viewable satellites may be used, tracked, and nulls determined for each, and many antennas if in a known pattern relative to each other can be used to make the determinations more accurate and reliable.

The invention is a communicating method in mobile terminal with many antenna array elements, including the steps: receiving corresponding receiving vector signals coming from many antenna array elements; according to the corresponding receiving vector signals, calculating their respective proper weighted vectors; and making weighted combination on the corresponding proper weighted vectors and their respective receiving vector signals to obtain an output signal with the maximum SNR, and the method not only keeps good system performance but also effectively reduces the complexity of generating weighted vectors.

A leaky-wave antenna capable of multi-plane scanning is provided. The leaky-wave antenna includes a substrate, a first antenna series, a second antenna series and a plurality of control units. The first antenna series intersects with the second antenna series to share a predetermined antenna unit among many antenna units. A part of the antenna units is connected in series to extend from a first and a second transmission lines of the predetermined antenna unit to compose the first antenna series, and the other antenna units are connected in series to extend from a third and a fourth transmission lines of the predetermined antenna unit to compose the second antenna series. The control units control the transmission paths between the first to the fourth transmission lines and the antenna units, and switch a leaky beam to different scanning planes, wherein the leaky beam scans with frequency variation through the antenna units.

Systems and methods are disclosed to intelligently employ antenna resources in a manner that may reduce interference between communications signals even in instances where multiple separate frequency band communications need to be supported in a vehicle of limited size. A manifold antenna system is proposed that provides a scheme and a physical construct whereby multiple individual radio receiver / transmitter units may share a limited number of transmitting and receiving antennas. The disclosed manifold antenna system is particularly adaptable to aircraft, spacecraft, vessel or vehicle applications where there is limited room for mounting a number of individual antennas as may be needed to support each radio receiver / transmitter unit in an effort to minimize an amount of interference as is conventionally caused by having transmitting antennas located in too close a proximity to receiving antennas.

Disclosed are a communication method and a base station. The method includes: the base station, through a controller thereof, receiving a baseband signal to be transmitted which is sent by a first intelligent mobile terminal, generating precoding information for immediate data transmission according to a number of antennas and carrier information, sending the baseband signal and the precoding information to a baseband processor of the base station, processing the baseband signal by the baseband processor according to the precoding information, modulating the processed baseband signal, and sending the modulated signal through a radio frequency (RF) circuit.

The invention discloses a large-scale MISO collaborative energy efficiency sending method which achieves optimization of energy efficiency in a large-scale antenna system under the constraints of a specific signal base station total power and a signal to interference plus noise power ratio. Firstly, the duality of uplink and downlink transmission is introduced into optimization of the energy efficiency, a corresponding energy efficiency optimization target function is set, a virtual uplink problem paired with downlink transmission is introduced, the virtual uplink transmission problem is solved through GP optimization, the corresponding uplink optimization result is converted into the solution of an original downlink transmission problem, and therefore the energy efficiency transmission problem of multiple users of the downlink is resolved. By considering the particularity of the large-scale antenna system, a wave beam design and power distribution method only using large-scale fading is obtained. The method is low in calculation complexity, is easy to achieve, needs a small feedback quantity under the large-scale antenna system, and the performance is close to that of an algorithm obtaining complete channel information feedback under the condition of too many antennas.