Modified U-Slot Stacked Micro-Strip Patch Antenna for Ultra-Wideband Applications in S Band, C Band and X Band

Document Type: Technical Brief


1 Poorima College of Engineering, Jaipur, Rajasthan, India

2 Poornima College Of Engineering, Jaipur


The U-slot micro-strip patch antennas were originally developed for bandwidth broadening applications. This study presents a transmission line feed to modify the U-slot stacked rectangular micro-strip patch antenna for Ultra-Wide Band (UWB) communications. The modified antenna has a U-cut loaded with parallel slits and corner slots and is printed on a dielectric substrate of FR4 with relative permittivity (εr) of 4.4, the thickness of 1.59 mm and the tangent loss of 0.025. The results show that the proposed antenna achieves an impedance bandwidth of 11.55 GHz (2.1 – 13.65 GHz) with the return loss < (-10) dB. This antenna can be employed for ultra-wideband applications in S Band, C Band and X Band. The proposed patch antenna is designed and simulated by using IE3D 14.0 software. Simulation results are presented in terms of the resonant frequency, the return loss, VSWR, the impedance bandwidth and the impedance matching.


Main Subjects

[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.