7 results about "Antenna element" patented technology

The invention discloses a phased-array antenna active standing wave automatic testing device which comprises a computer, a vector network analyzer and a multichannel matrix switch. The multichannel matrix switch is connected with an antenna array to be tested. The switching time of a matrix switch and the data acquisition time of the vector network analyzer are configured to be synchronous. The vector network analyzer is configured to test and store the standing wave coefficients of respective antenna elements in the antenna array and the mutual coupling coefficients between the elements. According to the active standing wave computational formula of the antenna elements in the phased array, an automatic computation program is written. After the standing wave coefficients and mutual coupling coefficients of the antenna elements in the entire antenna array are tested, the active standing wave parameters of respective antenna elements are calculated and output, and then the test is completed. The invention also discloses a method for automatically testing the active standing wave of a phased-array antenna. The automatic test shortens the active standing wave test time of the phased-array antenna, reduces labor cost, improves test work efficiency, and reduces test cost.

A method for determining weight factors of antenna beams, the method comprising using at least one directional antenna beam implemented with an antenna array to establish a radio link, forming a radio cell with the antenna beam, dividing the radio cell into at least two different cells by dividing the antenna beam, selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of a radio cell formed with the antenna array and corresponding weight factors of at least one, second radio cell formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A vehicle, radar system of the vehicle and method of determining an elevation of an object. The radar system includes a transmitter that transmits a reference signal and a receiver that to receive at least one echo signal related to reflection of the reference signal from an object. The receiver includes an antenna array having a plurality of horizontally-spaced antenna elements. A processor determines a first uncertainty curve associated with an azimuth measurement related to the at least one echo signal, determines a second uncertainty curve associated with a Doppler measurement and a velocity measurement related to the at least one echo signal, and locates an intersection of the first uncertainty curve and the second uncertainty curve to determine the elevation of the object.

The phase-controlled antenna element consists of a waveguide emitter (1) with signal output and signal injection (7), into which a rotatable phase control element (2) is introduced, and a drive unit (6). The phase control element comprises in this case a holder (3), at least two polarisers (4) which are fastened to the holder (3), and a connecting element (5). Each of the at least two polarisers (4) can convert a circularly polarized signal into a linearly polarized signal. The phase control element (2) is rotatably fitted in the waveguide emitter (1) and is connected to the drive unit (6) with the aid of the connecting element (5) in such a manner that the drive unit (6) can rotate the phase control element (2) about the axis (8) of the waveguide emitter (1), as illustrated in the form ofa sketch in fig. 1.

Provided is an antenna device that is configured as a multi-resonant antenna and that allows for flexible adjustment of the resonance frequencies. The antenna device comprises: a substrate; a ground pattern (GND) formed on the surface of the substrate; and a first element (3) and a second element (4). The first element includes a feeding point (FP) on a base end side and also includes first passive elements (P1a, P1b) and an antenna element (AT) connected to one another and extending. The second element has a base end connected to the ground pattern and extends along the first element. The first element has: a first extending portion (E1) that extends from the base end to the first passive elements along the ground pattern; a second extending portion (E2) that extends from the first passive elements in the extending direction of the first extending portion with the antenna element (AT) existing at a midpoint; a third extending portion (E3) that extends from the front end of the second extending portion; and a fourth extending portion (E4) that extends from the front end of the third extending portion along the second extending portion and that has a front end connected to the first extending portion.

A distributed beamforming system includes a platform terminal and a plurality of user terminals. The platform terminal includes an antenna array including a plurality of antenna elements. Each antenna element transmits a wide-area beam configured to encompass each of the plurality of user terminals. The platform terminal also includes one or more processors in electronic communication with the antenna array and a memory coupled to the one or more processors. The memory stores data into a database and program code that, when executed by the one or more processors, causes the platform terminal to receive an incoming signal and split the incoming signal into a plurality of individual wireless signals. Each individual wireless signal corresponds to one of the plurality of antenna elements of the antenna array. The system also transmits the plurality of individual wireless signals to the user terminal by the antenna array.