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A modular multichannel receiver is presented in this work to offer a flexible solution for the scalable active antenna array. Both the antenna array architecture and relevant hardware are introduced. The proposed receiver adopts direct digital synthesis (DDS) based phase shifting to achieve a phase resolution in sub-degree level. The hardware design of the RF front-end, multichannel phased signal...
A multi-channel phased signal generator with robust and extensible automatic synchronization network is presented in this work to meet the ever increasing demand for the mixed signal based active antenna array. The proposed generator architecture possesses high flexibility of building up the scalable active antenna system and is validated by the experimental results of a prototype. Furthermore, its...
Resistive Loading between the elements of an antenna array is presented for the reduction of the reflected signals. The principle of the loading method is illustrated by a circular array of bow-tie antennas with discrete resistors loading. The reflected signal for the loaded circular array has been significantly diminished compared with the unloaded array. Either the discrete resistors or the continuous...
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...
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