volume | PIER Journals

Abstract

This is the first communication reporting a compact broadband printed circular slot antenna with stair shaped ground plane in which bandwidth is enhanced mainly in the lower frequency band on adding 19 strips at regular space intervals in the partial ground plane. The impedance matching at specific band (7.1-8.4 GHz) takes place as a result of circular slot in the patch. The proposed structure is printed on an FR4 substrate with ε_r = 4.3 and 0.025 loss tangent over a compact volume of 20×25×1.5 mm³. The impedance bandwidth (S₁₁ < -10 dB) of the proposed antenna is 133.7 % (3.0-15.1 GHz). The antenna exhibits 4.9 dB peak gain and 74 % peak radiation efficiency in the operating band. Satisfactory results and such a simple and easy to fabricate design with compact space make the proposed antenna a suitable choice for UWB applications, 5.2/5.8 GHz WLAN bands, 3.5/5.5 GHz Wi-MAX bands, X band (8-12 GHz) and other wireless communication systems. Measured and simulated results are in good agreement, affirming the simulation process. Omnidirectional radiation patterns are generally observed in the operating band of the designed antenna.

1. Wong, K. L., Compact and Broadband Microstrip Antennas, John Wiley & Sons, 2002.
doi:10.1002/0471221112

2. Samsuzzaman, M. and M. T. Islam, "A semi-circular shaped super wideband patch antenna with high bandwidth dimension ratio," Microwave and Optical Technology Letters, Vol. 57, No. 2, 445-452, Feb. 2015.
doi:10.1002/mop.28872 Google Scholar

3. Baudha, S. and D. K. Vishwakarma, "Miniaturized dual broadband printed slot antenna with parasitic slot and patch," Microwave and Optical Technology Letters, Vol. 56, No. 10, 2260-2265, Oct. 2014.
doi:10.1002/mop.28567 Google Scholar

4. Ojaroudi, N. and M. Ojaroudi, "Novel design of dual band-notched monopole antenna with bandwidth enhancement for UWB applications," IEEE Antennas and Wireless Propag. Letters, Vol. 12, 698-701, 2013.
doi:10.1109/LAWP.2013.2264713 Google Scholar

5. Telsang, T. M. and A. B. Kakade, "Ultra wideband slotted semicircular patch antenna," Microwave and Optical Technology Letters, Vol. 56, No. 2, 362-369, Feb. 2014.
doi:10.1002/mop.28102 Google Scholar

6. Baudha, S. and D. K. Vishwakarma, "A compact broadband printed monopole antenna with Ushaped slit and rectangular parasitic patches for multiple applications," International Journal of Microwave and Wireless Technologies, No. 4, Apr. 2014. Google Scholar

7. Moghadasi, M. N., R. Hafezifard, R. A. Sadeghzadeh, H. Seyyedhatami, and M. Torkamani, "Small circular-shaped UWB antenna for wireless communication applications," Microwave Optical Technology Letters, Vol. 54, No. 12, 2885-2888, Dec. 2012.
doi:10.1002/mop.27201 Google Scholar

8. Baudha, S. and D. K. Vishwakarma, "Bandwidth enhancement of a planar monopole microstrip patch antenna," International Journal of Microwave and Wireless Technologies, No. 12, Dec. 2014. Google Scholar

9. Karli, R., H. Ammor, J. Terhzaz, M. Chaibi, and A. M. Sanchez, "Design and construction of miniaturized UWB microstrip antenna with slots for UWB applications," Microwave and Optical Technology Letters, Vol. 57, No. 2, 460-463, Feb. 2015.
doi:10.1002/mop.28869 Google Scholar

10. Lu, J. H. and C. H. Yeh, "Planar broadband arc-shaped monopole antenna for UWB system," IEEE Trans. Antennas Propag., Vol. 60, No. 7, 3091-3094, Jul. 2012.
doi:10.1109/TAP.2012.2196954 Google Scholar

11. Ray, K. P., S. S. Thakur, and A. A. Deshmukh, "Slot cut printed elliptical UWB monopole antenna," Microwave and Optical Technology Letters, Vol. 56, No. 3, 631-635, Mar. 2014.
doi:10.1002/mop.28134 Google Scholar

12. Baudha, S. and D. K. Vishwakarma, "Corner truncated broadband patch antenna with circular slots," Microwave and Optical Technology Letters, Vol. 57, No. 4, 845-849, Apr. 2015.
doi:10.1002/mop.28968 Google Scholar

13. Sze, J. Y. and K. Wong, "Bandwidth enhancement of a microstrip line-fed printed wide-slot antenna," IEEE Trans. Antennas Propag., Vol. 49, No. 7, 1020-1024, Jul. 2001.
doi:10.1109/8.933480 Google Scholar

14. Jan, J. Y. and J. W. Su, "Bandwidth enhancement of a printed wide-slot antenna with a rotated slot," IEEE Trans. Antennas Propag., Vol. 53, No. 6, 2111-2114, Jun. 2005.
doi:10.1109/TAP.2005.848518 Google Scholar

15. Jan, J. Y. and L. C. Wang, "Printed wideband rhombus slot antenna with a pair of parasitic strips for multiband applications," IEEE Trans. Antennas Propag., Vol. 57, No. 4, 1267-1270, Apr. 2009.
doi:10.1109/TAP.2009.2015859 Google Scholar

16. Sung, Y., "Bandwidth enhancement of a microstrip line-fed printed wide-slot antenna with a parasitic centre patch," IEEE Trans. Antennas Propag., Vol. 60, No. 4, 1712-1716, Apr. 2012.
doi:10.1109/TAP.2012.2186224 Google Scholar

Dr. Sudeep Baudha

Dr. Kumar Vishwakarma Dinesh