Architecture of C-band Phased Array Feed with RFSoC digital beamformer

2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI:10.23919/AT-AP-RASC54737.2022.9814401

A. Navarrini, A. Melis, G. Comoretto, T. Pisanu, R. Nesti, P. Marongiu, P. Ortu, P. Maxia, A. Ladu, H. Ghobadi, R. Concu, G. Angius, A. Cabras, L. Schirru, P. Di Ninni, M. Belluso, S. Billotta

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引用次数: 2

Abstract

We describe the architecture of a room-temperature C-band Phased Array Feed (PAF) demonstrator based on Radio Frequency System-on-Chip (RFSoC) for radio astronomy application. The instrument operates across the 4.75-6.00 GHz RF band (C-band). The RF section includes a compact module based on an 8×8 array of dual-polarization antennas integrated with MMIC (Monolithic Microwave Integrated Circuit) Low Noise Amplifiers (LNAs). A subset of 32 elements of one of the two polarization channels of the 128 antennas are connected to the LNAs, while the rest are terminated into internal loads. Following two stages of filtering and signal conditioning, the 32 RF signals are injected in two commercial RFSoC digital boards, each accepting 16 inputs with 1.25 GHz bandwidth, that will perform the frequency channelization, the partial and final beamforming of four independent beams with 1.25 GHz instantaneous bandwidth.

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带RFSoC数字波束形成器的c波段相控阵馈电结构

介绍了一种基于射频片上系统(RFSoC)的室温c波段相控阵馈电(PAF)演示器的结构，用于射电天文学应用。仪器工作在4.75-6.00 GHz射频波段(c波段)。射频部分包括一个基于8×8双极化天线阵列的紧凑型模块，该阵列集成了MMIC(单片微波集成电路)低噪声放大器(LNAs)。128个天线的两个极化通道中的一个的32个元件的子集连接到lna，而其余的则端接到内部负载中。经过两个阶段的滤波和信号调理，32个射频信号被注入到两个商用RFSoC数字板中，每个数字板接受16个1.25 GHz带宽的输入，这些输入将执行频率信道化，以及四个1.25 GHz瞬时带宽的独立波束的部分和最终波束形成。

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2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)

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