1. Hybrid Analog–Digital Antenna Array With Built-in Image Injection Calibration.
- Author
-
Xie, Li, Yin, Xiaoxing, Lu, Cheng, Yang, Liang, Zhao, Hongxin, and Li, Shunli
- Subjects
ACTIVE antenna arrays ,ANTENNA arrays ,ACTIVE antennas ,PHASED array antennas ,ANTENNAS (Electronics) - Abstract
This study presents a hybrid receiving array architecture that combines analog and digital beamforming to offer a solution for the phased-array feed and other multifunction receive-only applications. This architecture is capable of handling multiple beams forming simultaneous and precision beam steering. To further reduce the hardware counts of the online performance monitoring, a calibration method is proposed in which none of the transmitters or the dedicated distribution network are used. The hybrid architecture concept and built-in calibration are validated experimentally via a prototype. The system performance, including the statistical results of the baseband measurement, phase error, and radiation patterns under various array configurations, are illustrated. An effective phase tuning step of 0.1^\circ, as well as a steering resolution at the subdegree level, is achieved, and the measured aperture distribution is in good agreement with that derived from the proposed online calibration. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
- Full Text
- View/download PDF