[1] Kahrizi, M., Sarkar, T.K., Maricevic, Z.A. Analysis of a wide radiating slot in the ground plane of a microstrip line, IEEE Trans. Microw. Theory Tech., 41(1), 1993, pp. 29–37.
[2] Chiou, J.-Y., Sze, J.-Y., Wong, K.L. A broadband CPW-Fed strip loaded square slot antenna, IEEE Trans. Antennas Propag., 51(4), 2003, pp. 719–721.
[3] Chen, H.-D. Broadband CPW-Fed square slot antennas with a widened tuning stub, IEEE Trans. Antennas Propagation, 51(4), 2003, pp. 1982–1986.
[4] Gupta, N., Gupta, V. Gain and Bandwidth Enhancement in Compact Microstrip Antenna, Birla Institute of Technology, Mesra, Ranchi835215, INDIA, 2005.
[5] Yoharaaj, D., Azmir, R.S., Ismail, A. A new approach for bandwidth enhancement technique in microstrip antenna for wireless applications, International RF and Microwave Conference, Putrajaya, Malaysia, 12-14 September, 2006.
[6] Pozar, D.M. A review of bandwidth enhancement techniques for microstrip antennas, Microstrip Antennas: Analysis and Design of Microstrip Antennas and Arrays, D. H. Schaubert (ed.), 157–166, IEEE Press, New York, 1995
[7] Tang, C.L., Chiou, J.Y., Waong, K.L. Beamwidth enhancement of circularly polarized microstrip antenna mounted on a three – dimensional ground structure, Microwave Opt. Technol. Lett., 32(2), 2002, pp. 149–154
[8] Mandal, K., Sarkar, S., Sarkar, P.P. Bandwidth enhancement of microstrip antennas by staggering effect, Microwave Opt. Technol. Lett., 53(10), 2011, pp. 2446–2447.
[9] Wu, C.-K., Wong, K.L. Broadband microstrip antenna with directly coupled and parasitic patches, Microwave Opt. Technol. Lett., 22(5), 1999, pp. 348–349.
[10] Surana, M., Sharma, O.P. Analysis of Triple Band Rectangular Patch Antenna Loaded With Pairs of L Shaped Slots, International Journal of Computer Applications, 111(12), 2015, pp. 36-41.
[11] Kumar, R., Vijay, R. A Compact Multiband Frequency Agile Microstrip Slot Antenna, International Conference on Advanced Computing & Communication Technologies, 5, 2015, pp. 8-11.
[12] Nornikman, H., Malek, F., Saudin, N., Shukor, M., Zainuddin, N.A., Abd Aziz, M.Z.A., Ahmad, B.H., Othman, M.A. Design of Rectangular Stacked Patch Antenna with Four L-Shape Slots and CPW-Fed for WiMAX Application, 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering, Bandung, 7-8 November, 2013.
[13] Colles, D., Arakaki, D. Multi Technique Broadband Microstrip Patch Antenna Design, IEEE Transactions on Antennas and Propagations, Memphis, TN, USA, 2014, pp. 1879-1880.
[14] Balanis, C.A. Antenna theory analysis and design, John Wiley & Sons, Inc., Hoboken, New Jersey, 2005.