Affordable Astronomy using Horn Antenna

We have developed an affordable horn antenna at St. Stephen’s College, which has been used to perform various research-based activities in the college astronomy lab. In this article, we present three of our experiments performed in our undergraduate lab with respect to radio frequency interference in the campus and provide the relevant data. We also present and analyse our results for the 21-cm Hydrogen line emission data collected using our affordable horn antenna. In the third experiment, we study the radiation pattern of our horn antenna. The aim of the article is to present experiments to explore radio astronomy in the lab that can be done by undergraduate students with minimum cost.