volume | PIER Journals

Abstract

This paper discusses the design of a 6-m Cassegrain optics based multiband reflector antenna integrated with beam waveguide (BWG) optics, which consists of an ellipsoidal mirror and three plane mirrors. The presented antenna has been simulated, and 75.8% and 76.8% aperture efficiencies have been achieved at 0.225 THz and 0.338 THz, respectively. The initial design parameters of elements of BWG network are computed using fundamental Gaussian beam parameters. The simulated results of the antenna including aperture efficiency have been presented and discussed in detail. The antenna has been designed for the ground based THz telescope for radio astronomy.

1. Stacey, G. J., "New ground based facilities for THz astronom," 19th International Symposium on Space Terahertz Technology, 33-41, Groningen, April 28{30, 2008. Google Scholar

2. Onishi, T., A. Nishimura, Y. Ota, A. Hashizume, Y. Kojima, A. Minami, K. Tokuda, S. Touga, Y. Abe, M. Kaiden, K. Kiimura, K. Muraoka, H. Maezawa, H. Ogawa, K. Dobashi, T. Shmoikura, Y. Yonekura, S. Asayama, T. Handa, T. Nakajima, T. Noguchi, and N. Kuno, "A 1.85-m mm- submm telescope for large-scale molecular gas surveys in ¹²CO, ¹³CO, and C¹⁸O (J = 2 - 1)," Astron. Soc. Japan, Vol. 65, No. 78, 61-64, August 2013. Google Scholar

3. Yang, J., Y.-X. Zuo, Z. Lou, J.-Q. Cheng, Q.-Z. Zhang, S.-C. Shi, J.-S. Huang, Q.-J. Yao, and Z. Wang, "Conceptual design studies of the 5m terahertz antenna for Dome A, Antarctica," Research in Astro. Astrophys, Vol. 13, No. 12, 1493-1508, 2013.
doi:10.1088/1674-4527/13/12/010 Google Scholar

4. Sorensen, S. B. and K. Pontoppidan, "Analysis of the ALMA telescope and front-ends," 21st International Symposium on Space Terahertz Technology, 121-127, Oxford, March 23{25, 2010. Google Scholar

5. Rolo, L. F., M. H. Paquay, R. J. Daddato, J. A. Parian, D. Doyle, and P. de Maagt, "Terahertz antenna technology and verication: Herschel and Planck --- A review," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 7, 2046-2063, July 2010.
doi:10.1109/TMTT.2010.2050179 Google Scholar

6. Wang, C., H. Li, K. Ying, Q. Xu, N.Wang, B. Duan, W. Gao, L. Xiao, and Y. Duan, "Active surface compensation for large radio telescope antennas," Hindawi Int. J. of Antenna and Propagation, 1-17, Article ID 3903412, 2018. Google Scholar

7. Navarrini, A., et al. "Front-ends and phased array feeds for the sardinia radio telescope," 32nd URSI GASS, Montreal, August 19{26, 2017. Google Scholar

8. Chu, T.-S., "An imaging beam waveguide feed," IEEE Transactions on Antennas and Propagation, Vol. 31, No. 4, 614-619, July 1983. Google Scholar

9. Paine, S., D. C. Papa, R. L. Leombruno, X. Zhang, and R. Blundell, "Beam waveguide and receiver optics for the SMA," Fifth International Symposium on Space Terahertz Technology, 811-823, Michigan University, May 1994. Google Scholar

10. Sugimoto, M., M. Carter, J. Inatani, Y. Sekimoto, and S. Iguchi, "Design of corrective beam waveguide system for the ALMA/ACA 7-m antenna," Pub. Astro. Soc. Japan, Vol. 61, 1065-1080, October 25, 2009. Google Scholar

11. McEwan, N. J. and P. F. Goldsmith, "Gaussian beam techniques for illuminating re ector antennas," IEEE Transactions on Microwave Antennas and Propagation, Vol. 37, No. 3, 297-304, March 1989.
doi:10.1109/8.18725 Google Scholar

12. Whale, M., "Optical characterisation of astronomical submillimetre receivers including ALMA bands 5 and 9,", A Ph. D thesis, NUI Maynooth, Maynooth, Co. Kildare, Ireland, January 2010. Google Scholar

13. Chahat, N., T. J. Reck, C. Jung-Kubiak, T. Nguyen, R. Sauleau, and G. Chattopadhyay, "1.9-THz multi are angle horn optimization for space instruments," IEEE Transactions on Terahertz Science and Technology, Vol. 5, No. 6, November 2015. Google Scholar

14. Wylde, R. J. and D. H. Martin, "Gaussian beam-mode analysis and phase-centers of corrugated feed horns," IEEE Transactions on Microwave Theory and Techniques, Vol. 41, No. 10, 1691-1699, October 1993.
doi:10.1109/22.247912 Google Scholar

15. Singh, V. K., Y. Tyagi, S. Rakshit, A. Solanki, B. K. Pandey, S. B. Chakrabarty, and M. B. Mahajan, "Dual-band beam waveguide fed terahertz antenna for ground telescope," CAP-2019, Ahmedabad, December 19{22, 2019. Google Scholar

16. Mathew, N., S. Sahoo, R. Ramachandran Pillai, and C. Suresh Raju, "Millimeter-wave radiometric information content analysis for venus atmospheric constituents," Special Issue of the 2019 URSI Asia-Pecic Radio Science Conference, 2019. Google Scholar

17. Uzawa, Y., Y. Fujii, T. Kojima, M. Kroug, W. Shan, S. Ezaki, A. Miyachi, H. Kiuchi, and A. Gonzalez, "Superconducting receiver technologies supporting ALMA and future prospects," Special Issue of the 2019 URSI-Japan Radio Science, 2019. Google Scholar

Dr. Vijay Kumar Singh

Dr. Yogesh Tyagi

Dr. Pratik Mevada

Dr. Soumyabrata B. Chakrabarty

Dr. Milind Mahajan