Electromagnetic simulation and beam-pattern optimization of a C-band phased array feed for the Sardinia radio telescope

Date Issued
2019
Author(s)
•
•
DOI
Abstract
We report on results of electromagnetic co-simulations and beam-pattern optimization of the C-band PHAROS (PHased Arrays for Reflector Observing Systems) Phased Array Feed (PAF) from the primary focus of the 64-m diameter Sardinia Radio Telescope (SRT). We calculated the radiation patterns of a sub-array of 24 PHAROS Vivaldi array elements and propagated them through the reflector. We present the SRT far-field beam patterns obtained by linearly combining different PAF sub-array configurations with uniform weights. Furthermore, we used the Conjugate Field Matching (CFM) technique to derive optimum beam weights to maximize the SRT on-axis gain. The results show that the PHAROS array could be used at the focus of the SRT to provide high antenna performance, with high-quality illumination and efficiency greater than 60% across 4-8 GHz.
Coverage
2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON)
Start page
137
Conferenece
2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON)
Conferenece place
Lviv, Ukraine
Conferenece date
2-6 July, 2019
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open.access
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