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Применить Всего найдено 4. Отображено 2.
29-06-2017 дата публикации

Final fabrication and calibration steps for hierarchically elaborated phased-array antenna and subarray manufacturing process

Номер: US20170187109A1
Автор: James June-Ming Wang, Chak-Ming Chie, Hamed Alsuraisry, Saleh Alsaif, Abdulelah Alshehri, WANG JAMES JUNE-MING, CHIE CHAK-MING, ALSURAISRY HAMED, ALSAIF SALEH, ALSHEHRI ABDULELAH, Wang James June-Ming, Chie Chak-Ming, Alsuraisry Hamed, Alsaif Saleh, Alshehri Abdulelah
Принадлежит: Kacst, Tubis Technology Inc

A process writes phase shift error correction values into a phased-array antenna to normalize a range of manufacturing variances. An axial ratio is determined for an antenna weight vector (AWV) by making multiple measurements with the horn of a test antenna mechanically rotating from 0 to 180 degree or with dual polarization test antenna. For calibration of the whole array, each subarray is treated in the same fashion as equivalent to an antenna element in the subarray calibration. The subarray is electronically rotated as a whole (all elements rotated by the same phase shift value) from 0 to 360 degree during the full array calibration. Due to small power variation among AWVs, calibration solely by REV results fail to consistently converge to resolution. Accordingly, the apparatus measures and compares axial ratios. During final fabrication, the apparatus programs an AWV with best axial ratio into each non-transitory array element.

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Номер записи: 1
29-06-2017 дата публикации

Hierarchically Elaborated Phased-Array Antenna Modules and Method of Calibration

Номер: US20170187108A1
Автор: James June-Ming Wang, Chak-Ming Chie, Hamed Alsuraisry, Saleh Alsaif, Abdulelah Alshehri, WANG JAMES JUNE-MING, CHIE CHAK-MING, ALSURAISRY HAMED, ALSAIF SALEH, ALSHEHRI ABDULELAH, Wang James June-Ming, Chie Chak-Ming, Alsuraisry Hamed, Alsaif Saleh, Alshehri Abdulelah
Принадлежит: Tubis Technology Inc, King Abdulaziz City for Science and Technology

An apparatus consisting of hierarchically elaborated antenna modules is calibrated by steps. Although the AWV can be calculated mathematically based on the required phase shift values of each antenna element for a beam direction to compensate for signal delay. However, in practice, due to hardware implementation imperfection, coupling in signal path for each antenna element within hardware, inaccuracies of implementations, physical misalignment, the mathematically generated AWV does not necessarily provide alignment between transmit beam and receive beam. This subset is sufficient is all practical operation. The subset of AWVs are typically called codebook and the receiver beam points to different direction by using a AWV within the codebook.

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Номер записи: 2