A wide bandwidth, dual polarized, modified four-square antenna is presented as a feed antenna for radio astronomical measurements. A linear array of these antennas is used as a line-feed for cylindrical reflectors for Tianlai, a radio interferometer designed for 21~cm intensity mapping. Simulations of the feed antenna beam patterns and scattering parameters are compared to experimental results at multiple frequencies across the 650 - 1420 MHz range. Simulations of the beam patterns of the combined feed array/reflector are presented as well.
@article{arxiv.1705.04435,
title = {Simulation and Testing of a Linear Array of Modified Four-Square Feed Antennas for the Tianlai Cylindrical Radio Telescope},
author = {Aleksander J. Cianciara and Christopher J. Anderson and Xuelei Chen and Zhiping Chen and Jingchao Geng and Jixia Li and Chao Liu and Tao Liu and Wing Lu and Jeffrey B. Peterson and Huli Shi and Catherine N. Steffel and Albert Stebbins and Thomas Stucky and Shijie Sun and Peter T. Timbie and Yougang Wang and Fengquan Wu and Juyong Zhang},
journal= {arXiv preprint arXiv:1705.04435},
year = {2017}
}