publication . Preprint . 2014

A Resistive Wideband Space Beam Splitter

Mahesh, Nivedita; Subrahmanyan, Ravi; Shankar, N. Udaya; Raghunathan, Agaram;
Open Access English
  • Published: 10 Jun 2014
Abstract
We present the design, construction and measurements of the electromagnetic performance of a wideband space beam splitter. The beam splitter is designed to power divide the incident radiation into reflected and transmitted components for interferometer measurement of spectral features in the mean cosmic radio background. Analysis of a 2-element interferometer configuration with a vertical beam splitter between a pair of antennas leads to the requirement that the beam splitter be a resistive sheet with sheet resistance {\eta}o /2, where {\eta}o is the impedance of free space. The transmission and reflection properties of such a sheet is computed for normal and ob...
Subjects
arXiv: Physics::Optics
free text keywords: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Optics
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Nivedita Mahesh received the B.E degree in Instrumentation and Control Engineering from PSG College of Technology, Coimbatore, India, in 2012.

Since 2013, she has been at the Raman Research Institute, Bangalore, India.

Ravi Subrahmanyan received the B.Tech. degree in Electrical Engineering from the Indian Institute of Technology, Madras, India, in 1983 and the Ph.D.

degree in astronomy from the Physics department of the Indian Institute of Science, Bangalore, India, in 1990. Since 2006, he has been at the Raman Research Institute, Bangalore, India.

N. Udaya Shankar received the M.Sc. degree in Physics from the Bangalore University in 1973 and Ph.D. degree in astronomy in 1986. Since 1978 he has been at the Raman Research Institute, Bangalore, India, working on the instrumentation for aperture arrays, wide-field imaging and sky surveys.

Agaram Raghunathan received the B.E. degree in Instrumentation Engineering from Bangalore Institute of Technology, in 1990 and M.Sc. Engg. (by research) from the Engineering Department of the Bangalore University, India, in 2000. Since 1990, he has been at the Raman Research Institute, Bangalore, India.

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