In this paper, four novel wide-band dual tapered slot (DTS) microstrip antennas (MSAs) are proposed for X-Band Satellite Communications (SATCOM) applications. Three of them have stripline feeds between SMA connector and tapering profile, whereas the fourth one omits the stripline feed. Each antenna consists of two microstrip lines on each side of an FR-4 substrate, fed with a coaxial connector from one face. Towards the edges, the distance between conductors is increasing gradually. The aim of this study is to design receiver antennas capable of operating in X-Band Satellite Communications (7250-7750 MHz) range and investigate the effects of tapering profiles on the performance. For this purpose, each antenna is defined in terms of parameters, and the optimum values for all parameters are calculated using High Frequency Structure Simulator (HFSS) software. The antennas are simulated and practically fabricated. Results show good agreement between simulations and measurements. The antennas have impedance bandwidth of 380 MHz centered at 7448 MHz for dual linearly tapering, 540 MHz centered at 7434 MHz for dual circularly tapering, 900 MHz centered at 7555 MHz for dual exponentially tapering, within the aimed Super High Frequency (SHF) range. Also, the designed fourth antenna having dual circularly tapering without the stripline feed has a bandwidth of 1150 MHz centered at 7676 MHz. It is proposed that taper profile affects bandwidth, gain, radiation efficiency, radiation pattern and antenna dimensions.
2. Gibson, P. J., "The vivaldi aerial," 9th European Microwave Conference, 101-105, Brighton, UK, IEEE, September 17–20, 1979.
3. Prasad, S. N. and S. Mahapatra, "A novel MIC slotline aerial," 9th European Microwave Conference, 120-124, Brighton, UK, IEEE, September 17–20, 1979.
4. Gazit, E., "Improved design of a Vivaldi antenna," IEE Proc.-H, Vol. 135, 89-92, 1988.
5. Langley, J. D. S., P. S. Hall, and P. Newham, "Balanced antipodal vivaldi antenna for wide bandwidth phased arrays," IEE Proceedings — Microwaves, Antennas and Propagation, Vol. 143, 97-102, 1996.
6. Yngvesson, K. S., T. L. Korzeniowski, Y. S. Kim, E. L. Kollberg, and J. F. Johansson, "The tapered slot antenna — a new integrated element for millimeter-wave applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 37, 365-374, 1989.
7. Fisher, J., "Design and performance analysis of a 1–40 GHz ultra-wideband antipodal vivaldi antenna," German Radar Symposium GRS 2000, Berlin, Germany, October 11–12, 2000.
8. Schiek, B. and J. Kohler, "An Improved microstrip-to-microslot transition," IEEE Transactions on Microwave Theory and Techniques, Vol. 24, 231-233, 1976.
9. Schuppert, B., "Microstrip/slotline transitions, modeling and experimental investigation," IEEE Transactions on Microwave Theory and Techniques, Vol. 36, 1272-1281, 1988.
10. Sloan, R., M. M. Zinieris, and L. E. Davis, "A broadband microstrip to slotline transition," Microw. Opt. Techn. Let., Vol. 18, 339-342, 1998.
11. Erdogan, Y., "Parametric study and design of vivaldi antennas and arrays," MSc, Middle East Technical University, Ankara, Turkey, 2009.
12. Jolani, F., G. Dadashzadeh, M. Naser-Moghadasi, and A. Dadgarpour, "Design and optimization of compact balanced antipodal vivaldi antenna," Progress In Electromagnetics Research, Vol. 9, 183-192, 2009.
13. Lohn, J. D., G. S. Hornby, S. Gregory, A. Rodriguez-Arroyo, D. S. Linden, W. F. Kraus, and S. E. Seufert, "Evolutionary design of an X-band antenna for NASA’s space technology 5 mission," IEEE Antenna and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, 2313-2316, Monterey, CA, USA, IEEE, June 20–25, 2004.
14. Hornby, G. S., A. Globus, D. S. Linden, and J. D. Lohn, "Automated antenna design with evolutionary algorithms," American Institute of Aeronautics and Astronautics Space, 19-21, 2006.
15. Lee, J. J. and S. Livingston, "Wide band bunny-ear radiating element," Antennas and Propagation Society International Symposium, Vol. 3, 1604-1607, Ann Arbor, Miami, USA, IEEE, June 28–July 02, 1993.
16. Weinschel, H. D., "Progress report on development of microstrip cylindrical arrays for sounding rockets," Physics and Science Labratory, New Mexico State University, Las Cruces, 1973.
17. Sanford, G. G., "Conformal microstrip phased array for aircraft tests with ATS-6," 30th National Electronics Conference, Vol. 9, 252-257, Chicago, Illinois, USA, October 16–18, 1974.
18. Simons, R. N., R. Q. Lee, and T. D. Perl, "Non-planar linearly tapered slot antenna with balanced microstrip feed," Antennas and Propagation Society International Symposium, Vol. 4, 2109-2112, Chicago, Illinois, USA, IEEE, June 18–25, 1992.
19. Lekshmi, B. S. K. and I. J. Raglend, "Parametric study of tapered slot antenna for wide band applications," International Conference on Computation of Power, Energy, Information and Communication, 71-77, Chennai, Tamil Nadu, India, IEEE, April 22–23, 2015.