RRI-GBT Multi-Band Receiver: Motivation, Design & Development
Abstract
We report the design and development of a self-contained multi-band receiver (MBR) system, intended for use with a single large aperture to facilitate sensitive & high time-resolution observations simultaneously in 10 discrete frequency bands sampling a wide spectral span (100-1500 MHz) in a nearly log-periodic fashion. The development of this system was primarily motivated by need for tomographic studies of pulsar polar emission regions. Although the system design is optimized for the primary goal, it is also suited for several other interesting astronomical investigations. The system consists of a dual-polarization multi-band feed (with discrete responses corresponding to the 10 bands pre-selected as relatively RFI-free), a common wide-band RF front-end, and independent back-end receiver chains for the 10 individual sub-bands. The raw voltage time-sequences corresponding to 16 MHz bandwidth each for the two linear polarization channels and the 10 bands, are recorded at the Nyquist rate simultaneously. We present the preliminary results from the tests and pulsar observations carried out with the Green Bank Telescope using this receiver. The system performance implied by these results, and possible improvements are also briefly discussed.
Keywords
Cite
@article{arxiv.1210.2573,
title = {RRI-GBT Multi-Band Receiver: Motivation, Design & Development},
author = {Yogesh Maan and Avinash A. Deshpande and Vinutha Chandrashekar and Jayanth Chennamangalam and K. B. Raghavendra Rao and R. Somashekar and Gary Anderson and M. S. Ezhilarasi and S. Sujatha and S. Kasturi and P. Sandhya and Jonah Bauserman and R. Duraichelvan and Shahram Amiri and H. A. Aswathappa and Indrajit V. Barve and G. Sarabagopalan and H. M. Ananda and Carla Beaudet and Marty Bloss and Deepa B. Dhamnekar and Dennis Egan and John Ford and S. Krishnamurthy and Nikhil Mehta and Anthony H. Minter and H. N. Nagaraja and M. Narayanaswamy and Karen O'Neil and Wasim Raja and Harshad Sahasrabudhe and Amy Shelton and K. S. Srivani and H. V. Venugopal and Salna T. Viswanathan},
journal= {arXiv preprint arXiv:1210.2573},
year = {2015}
}
Comments
25 pages, 12 figures and 1 Table, Accepted for publication in ApJS