Subrahmanyan, Ravi ; Raghunathan, Agaram ; UdayaShankar, N. ; Singh, Saurabh ; Puthige, Sharath ; Mahesh, Nivedita ; Rao, Mayuri Sathyanarayana (2016) Wideband antennas for precision spectral radiometers for cosmology In: 2016 International Conference on Electromagnetics in Advanced Applications (ICEAA), 19-23 Sept 2016, Cairns, QLD, Australia.
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Official URL: https://ieeexplore.ieee.org/document/7731421/
Related URL: http://dx.doi.org/10.1109/ICEAA.2016.7731421
Abstract
Precision cosmology has been made possible by differential microwave radiometers that have imaged the anisotropy in the cosmic microwave background radiation. Continued progress is expected from measurement of spectral distortions in this cosmic radiation. A key distortion in the global sky spectrum is in the 40-250 MHz band and expected from variations in the hydrogen spin temperature and ionization state during Cosmic Dawn and Epoch of Reionization when the first stars and galaxies form. Electrically-small shaped ultra-wideband antennas are described that have been designed for the detection of these global or all-sky spectral distortions; a key design feature is the making of the transfer function Maximally Smooth.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Source: | Copyright of this article belongs to Institute of Electrical and Electronics Engineers. |
| ID Code: | 114239 |
| Deposited On: | 22 May 2018 04:52 |
| Last Modified: | 22 May 2018 04:52 |
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