학술논문
Preliminary Characterization of the Digitally Formed Beams of PHAROS2 Phased Array Feed
Document Type
Conference
Author
Source
2020 50th European Microwave Conference (EuMC) Microwave Conference (EuMC), 2020 50th European. :1035-1038 Jan, 2021
Subject
Language
Abstract
We describe the beamforming strategy and the preliminary laboratory characterization results of the beam pattern synthesized by the PHAROS2 Phased Array Feed (PAF), a 4-8 GHz PAF with digital beamformer for radio astronomy application. The PAF is based on an array of 10×11 dual-polarization Vivaldi antennas cryogenically cooled at 20 K along with low noise amplification modules (LNAs) cascaded with a multi-channel Warm Section (WS) receiver. We present the beamforming and test procedures used to, respectively digitally synthesize and characterize the PHAROS2 antenna array beam pattern at 6 GHz. The tests of the array were carried out at room temperature by directly connecting 24 antenna elements to the WS and iTPM digital beamformer in a laboratory measurement setup.