| Name: | Roshan Kumar Dora |
| Affiliation: | Indian Institute of Science Education and Research Bhopal |
| Conference ID : | ASI2024_35 |
| Title : | Two Element Broadband Log-Periodic Dipole Antenna Radio Interferometry: Exploring the SKA Low Frequency Band |
| Authors : | 1. Roshan Kumar Dora, Anumanchi Agastya Sai Ram Likhit, Katta Naveen,
2.Deep Bhowmik,
3. Krishna Balaji S,
4. Arutkeerthi N,
5. Abhishek R, Arul Pandian B, Sahana Bhattramakki, Prabu T, Raghavendra Rao K B, Keerthipriya S, Arasi Sathyamurthy |
| Authors Affiliation: | 1. Indian Institute of Science Education and Research, Bhopal-462066, India
2. Indian Institute of Science, Bangalore-560012, India
3. Indian Institute of Technology, Madras-600036, India
4. Indian Institute of Technology, Roorkee-247667, India
5. Raman Research Institute, Bangalore-560080, India |
| Mode of Presentation: | Poster |
| Abstract Category : | Facilities, Technologies and Data science |
| Abstract : | In this study, we present an innovative method for radio interferometry using an array of eight log-periodic dipole antennas (LPDA) operating in the frequency range similar to that of Square Kilometer Array (SKA) Low, i.e., 150-350 MHz. These are configured into two elements in an east-west orientation at the Gauribidanur Radio Observatory (77.428 E, 13.603 N). The front-end electronics, such as Low Noise Amplifiers and Band Pass Filters, and the back-end electronics, including the Fiber Optics Receiver, were tested. Additionally, the antenna array response was simulated using Computer Simulation Technology (CST). The Data Acquisition System (DAS) utilised an oscilloscope, streamlining our data collection process and further signal processing was conducted using Python and MATLAB, for which a dedicated web interface was designed. This interface enables remote data acquisition and processing via a secure LAN network. Users can obtain Raw Data Plots, Frequency Spectra, Spectrograms, RFI Masking, and Time Series Plots with a single click on the web interface. Our system successfully monitored both the solar and galactic plane transits. A reliable correlation between the two elements was evidenced by distinct fringe patterns and phase plots during the transits. Additionally, we effectively monitored local Radio Frequency Interference (RFI) sources, providing valuable insights for planning future observations. Looking ahead, we aim to expand our system to a 48 element array forming 3 tiles which could be upto 192 LPDAs, which holds promises for SKA Low along with that we aim to upgrade our DAS with greater automation, thereby contributing significantly to the field of radio astronomy instrumentation. |
