To accommodate the frequently changing requirements and demands of market there is continuous research and advances going on In the field of wireless communication. In the last few years, the industry has seen drastic qualitative and quantitative growth in terms of both technical and economic aspects, which played a crucial role in the rapid growth of this industry. Researchers have developed an extraordinary range of antennas to serve today`s demands, each with its own advantages and limitations. With further developments in mobile communication technology, the technology for antennas also saw drastic advancements. There is an intensive development in the study of microstrip antennas for wireless applications demonstrates broadband characteristics in which antenna size increases which can potentially eliminate their use for mobile communication. Due to which electronic components have been minimized. Thus microstrip patch antennas emerged with attractive features like simple in structure, smaller in dimension, low profile, low cost and are extremely attractive to be used in emerging UWB applications [1]. In this paper, three different types of slotted microstrip patch antennas i.e. Half I-U slot, Half I-F slot, and Half I-B slot have been proposed and designed for various wireless applications like Wi-MAX, Wi-Fi, WLAN, Bluetooth, ISM, etc. Slots on the proposed patch can be used to optimize antenna parameters. The numerical simulation and analysis for the antennas parameters like Radiation Pattern, VSWR, Return Loss, and Directivity were performed using CST (Computer Software Technology).

Computer Software Technology, Directivity, ISM, Microstrip Patch Antenna, Return Loss, Radiation Pattern, UWB, Voltage Standing Wave Ratio, Wi-Fi, Wi-Max, WLAN

[1] Govardhani Immadi, K. Swetha, M.Venkata Narayana, M.Sowmya, R.Ranjana,“Design of microstrip patch antenna for WLAN applications using Back to Back connection of Two E-Shapes,” International Journal of Engineering Research and Applications,Vol. 2, Issue. 3, pp. 319-323, May-Jun 2012.
[2] S. Ha and C. W. Jung, “Single patch beam steering antenna with U-slot for wearable fabric applications,” In the Proceedings of the 2011 IEEE International Symposium on Antennas and Propagation (APSURSI), pp. 1560–1562, 2011.
[3] S. Sultan, S. Imran, C. Xiaodong, and P. Clive, “Compact and Printed Multiband Antennas for 2G/3G/4G Smartphones,” In the Proceedings of the 2015 International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, pp. 1138–1139, 2015.
[4] M. A. Ennasar, I. Aznabet, M. Essaaidi, and M. Group, “A Compact Modified S-Shaped RFID Tag Antenna for Metallic Applications”, In the Proceedings of the 2015 IEEE 15th Mediterranean Microwave Symposium (MMS), pp. 8–10, 2015.
[5] Ramadan, A., K. Y. Kabalan, A. El-Hajj, S. Khoury, and M. Al-Husseini, “ A reconfigurable U-koch microstrip antenna for wireless applications,” Progress In Electromagnetics Research, PIER 93, 355-367, 2009.
[6] S.C.Gao, L.W.Li., “Small dual-frequency microstrip antenna”, IEEE Transaction on vehicular Technology,Vol.51,No.1. Jan.2002.
[7] S.Bhunia, S.Biswas, D.Sarkar, P.P.Sarkar, “Experimental investigation on dual-frequency broad band microstrip antenna with swastika Slot”, Indian Journal physics, Vol.81, No.4, pp. 497-499, April 2007.
[8] K.Gosalia, G.Lazzi. “Reduced size, Dual-polarized microstrip patch antenna for wireless communications”, IEEE Transactions on Antennas and Propagation , Vol.51, No.9, pp. 2182 – 2186, October 2003.
[9] S.Bhunia, D.Sarkar, S,Biswas, P.P.sarkar, B.Gupta,, K.Yasumoto “Reduced Size Small Dual-Frequency Microstrip Antenna” Microwave & optical Technology Letters, Vol. 50, No.4, pp.961-965, April 2008.
[10] S. Sarkar,D. Sarkar, A.Das Majumdar, P. P. Sarkar, S. Mondal, S. Biswas, “Miniaturization of Rectangular Microstrip Patch Antenna Using Optimized Single –Slotted ground plane”, Microwave &optical Technology Letters, Vol. 53, No.1, pp.111-115, January, 2011.
[11] Neha Gupta, “Effects of slots on Microstrip Patch Antenna”, International Research Journal of Engineering and Technology (IRJET) , Vol. 04, Issue. 02, pp. 1132-1135, Feb 2017.
[12] U. Shameem, M. Ur-rehman, Q. H. Abbasi, and K. Qaraqe, “A Low Profile Penta-band Antenna For Portable Devices”, In the Proceedings of the 2016 International Workshop on Antenna Technology (iWAT), pp. 174–177, 2016.
[13] L. Peng, C. L. Ruan, and J. Xiong, “Compact EBG for multi-band applications,” IEEE Trans. Antennas Propag., Vol. 60, No. 9, pp. 4440–4444, 2012.
[14] M. Borhani, P. Rezaei, and A. Valizade, “Design of A Reconfigurable Miniaturized Microstrip Antenna for Switchable Multiband Systems”, IEEE Antennas Wirel. Propag. Lett. , Vol. 1225, No. c, pp. 1–1, 2015.
[15] M. Chang and W. Weng, “A Printed Multi-band Slot Antenna for LTE / WLAN Applications,” In the Proceedings of the 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, pp. 1144–1145, 2015.
[16] L. X. Truong and Tran Minh Tuan, “Design A Microstrip Antenna with Defected Ground Structure”, In the Proceedings of the 2015 International Conference on Advanced Technologies for Communications (ATC) Design, pp. 160–163, 2015.
[17] J.S. Sun and S.Y. Huang,” A small 3-D multi-band antenna of F shape for portable phones’ applications”,Progress In Electromagnetics Research letters, Vol. 9, pp. 183-192, 2009.
[18] ShivamTyagi and Mohit Gharwar, “Design of Multiband S-shape Microstrip Patch Antenna for 4G Devices”, International Journal of Creative Research Thoughts, Vol. 6, Issue. 2, April 2018.
[19] Prachi, Brajlata Chauhan, and Manish Jaiswal,” Performance Analysis of Different Slotted U, Half U, π and Half πMicrostrip Patch Antennas for LTE Application,” International Journal of Computer Applications,Vol. 86,No.18,pp. 0975 – 8887, January 2014.
[20] Denidni, D.A. ,N.Hassaine, and Q. Rao,” Broadband high –gain e-shaped Microstrip antennas for high speed wireless networks,” Progress in Electromagnetic Research C, Vol. 1,pp. 105-111, 2008.
[21] G. F. Khodae, J. Nourinia, and C. Ghobadi, "A Practical Miniaturized U-Slot Patch Antenna with Enhanced Bandwidth," Progress In Electromagnetics Research B, Vol. 3, pp. 47-62, 2008.
[22] Wu, G.-L., W. Mu, G.Zhao and Y.-C. Jiao, “A novel design of dual circularly polarized antenna feed by L-strip,” Progress In Electromagnetics Research, PIER 79, 39-46, 2008.
[23] Ansari, J.A., P. Singh, S. K. Dubey, R.U. Khan, and B.R. Vishvakarma,” H-shaped stacked patch antenna for dual band operation,” Progress In Electromagnetics Research B, Vol. 5, pp. 291-302, 2008.
[24] M.T.Islam, M.N.Shakib and N.Misran,” Broadband E-H shaped Microstrip Patch Antenna For Wireless Systems,”Progress In Electromagnetics Research,PIER 98,163-173,2009.
[25] Pavel HAZDRA, Miloš MAZÁNEK, Jiří ČERMÁK,” Wideband Rectangular Microstrip Patch Antenna Using L-Probe Feeding System,” Radio engineering, Vol. 16, No. 3, pp. 37-41,September 2007.