Bandwidth Enhancement in CPW Fed Compact Rectangular Patch Antenna

Authors: Kirti Vyas, P. K. Singhal

Abstract:

This paper presents a novel CPW fed patch antenna supporting a wide band from 2.7 GHz – 6.5 GHz. The antenna is compact with size 32 x 30 x 1.6mm³, built over FR4-epoxy substrate (ε_r=4.4). Bandwidth enhancement has been achieved by using the concept of modified ground structure (MGS). For this purpose structural design has been optimized by parametric simulations in CST MWS. The proposed antenna can perform well in variety of wireless communication services including 5.15 GHz- 5.35 GHz and 5.725 GHz- 5.825 GHz WLAN IEEE 802.11 g/a, 5.2/ 5.5/ 5.8 GHz Wi-Fi, 3.5/5.5 GHz WiMax applications  and 3.7 - 4.2 GHz C band satellite communications bands. The measured experimental results show that bandwidth (S₁₁ < -10 dB) of antenna is 3.8 GHz. The performance of antenna is studied in terms of reflection coefficient, radiation characteristics, current distribution and gain.

Keywords: Broad band antenna, Compact, CPW fed, WLAN, Wi-Fi, Wi-Max, CST MWS.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1091758

References:

[1] Bhobe, A. U., C. L. Holloway, M. Piket-May, and R. Hall, "Wide-band slot antennas with CPW feed lines: Hybrid and log-periodic designs,” IEEE Trans. Antennas Propag.,Vol. 52, No. 10, pp.2545-2554, October 2004.
[2] Lin, X. C. and C.-C. Yu, "A dual-band CPW-fed inductive slot-monopole hybrid antenna,” IEEE Trans. Antennas Propag.,Vol. 56, No. 1, pp. 282-285, January 2008.
[3] Chen, J.-S., "Dual-frequency annular-ring slot antennas fed by CPW feed and microstrip line feed,” IEEE Trans. Antennas Propag.,Vol. 53, No. 1, pp.569-573, January 2005.
[4] Jiao, J. J., G. Zhao, F. S. Zhang, H.-W. Yuan, and Y.-C. Jiao, "A broadband CPW-fed T-shape slot antenna,” Progress In Electromagnetics Research,Vol. 76, pp.237-242, 2007.
[5] Dastranj, A. and H. Abiri, "Bandwidth enhancement of printed E-shaped slot antennas fed by CPW and microstrip line,” IEEE Trans. Antennas Propag.,Vol. 58, No. 4, Apr. 2010.
[6] J. H. Yoon "Fabrication and Measurement of Rectangular Ring with Open Ended CPW Fed Monopole Antenna for 2.5/5.2-GHz WLAN Operation”, Microw. Opt. Tech. Lett.,Vol. 48, No. 8, pp. 1480-1483, August 2006.
[7] Chiou, J.-Y, J.-Y. Sze, and K.-L. Wong, "A broad-band CPW-fed strip-loaded square slot antenna,” IEEE Trans. Antennas Propag., Vol. 51, No. 4, 719–721, April 2003.
[8] Chen, H.-D., "Broadband CPW-fed square slot antenna with a widened tuning stub,” IEEE Trans. Antennas Propag., Vol. 51,No. 8, 1982–1986, August 2003.
[9] T. Shanmuganantham, K. Balamanikandan, and S. Raghavan "CPW-Fed Slot Antenna for Wideband Applications”, Hindawi Publishing Corporation, International Journal of Antennas and Propagation, Volume 2008, Article ID 379247, doi:10.1155/2008/379247.
[10] M. Miao, B. L. Ooi, P. S. Kooi, "Broad band CPW fed wide slot antenna,” Microwave optical technol. Letter ,Vol 25, no. 3, pp 206-211, May 2002.
[11] Chang-Ju Wu, I-Fong Chen, and Chia-Mei Peng, "A Dual Polarization Bow-tie Slot Antenna for Broadband Communications,” Progress In Electromagnetics Research Symposium Proceedings, Marrakesh, Morocco, Mar. 20-23, 2011.
[12] Kirti Vyas, Garima Sanyal, Arun Kumar Sharma and Pramod Kumar Singhal, "Gain Enhancement Over a Wideband in CPW-Fed Compact Circular Patch Antenna,” International Journal of Microwave and Wireless Technologies, doi: 10.1017/S1759078713001037.