A printed slot antenna fed by a microstrip line with a diamond-shaped tuning stub for bandwidth enhancement is proposed and experimentally validated. The simulated results show that the impedance matching of the proposed rotated slot antenna is greatly affected by the dimension of the slot and by the size and the position of the diamond-shaped tuning stub. The experimental results demonstrate that the impedance bandwidth is over 123% for |S11|≤-10 dB ranging from 2.80 to 11.81 GHz. Moreover, the proposed antenna has a small size, and stable and omnidirectional radiation patterns are observed within the operating bandwidth.
2. Kraus, J. D. and R. J. Marhefka, Antennas: For All Applications, McGraw-Hill, New York, 2002.
3. Bakariya, P. S. and S. Dwari, "A new compact planar ultra-wideband microstrip patch antenna," 2013 Third International Conference on Advanced Computing and Communication Technologies (ACCT), 151-153, 2013.
doi:10.1109/ACCT.2013.36
4. Nakano, H. and J. Yamauchi, "Printed slot and wire antennas: A review," Proceedings of the IEEE, Vol. 100, No. 7, 2158-2168, 2012.
doi:10.1109/JPROC.2011.2180269
5. Sze, J. Y. and K. L. Wong, "Bandwidth enhancement of a microstrip-line-fed printed wide-slot antenna," IEEE Transactions on Antennas and Propagation, Vol. 49, No. 7, 1020-1024, 2001.
doi:10.1109/8.933480
6. Liu, Y. F., et al., "Experimental studies of printed wide-slot antenna for wide-band applications," IEEE Antennas and Wireless Propagation Letters, Vol. 3, No. 1, 273-275, 2004.
doi:10.1109/LAWP.2004.837510
7. Dastranj, A., A. Imani, and M. Naser-Moghaddasi, "Printed wide-slot antenna for wideband applications," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 10, 3097-3102, 2008.
doi:10.1109/TAP.2008.929459
8. Cheng, S., P. Hallbjorner, and A. Rydberg, "Printed slot planar inverted cone antenna for ultrawideband applications," IEEE Antennas and Wireless Propagation Letters, Vol. 7, 18-21, 2008.
doi:10.1109/LAWP.2007.914115
9. Dastranj, A. and H. Abiri, "Bandwidth enhancement of printed E-shaped slot antennas fed by CPW and microstrip line," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 4, 1402-1407, 2010.
doi:10.1109/TAP.2010.2041164
10. Liang, X. L., et al., "Printed binomial-curved slot antennas for various wideband applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 4, 1058-1065, 2011.
doi:10.1109/TMTT.2011.2113990
11. Jan, J. Y. and J. W. Su, "Bandwidth enhancement of a printed wide-slot antenna with a rotated slot," IEEE Transactions on Antennas and Propagation, Vol. 53, No. 6, 2111-2114, 2005.
doi:10.1109/TAP.2005.848518
12. Chen, W. L., G. M. Wang, and C. X. Zhang, "Bandwidth enhancement of a microstrip-line-fed printed wide-slot antenna with a fractal-shaped slot," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 7, 2176-2179, 2009.
doi:10.1109/TAP.2009.2021974
13. Sung, Y., "Bandwidth enhancement of a microstrip line-fed printed wide-slot antenna with a parasitic center patch," IEEE Transactions on Antennas and Propagation, Vol. 60, 1712-1716, 2012.
doi:10.1109/TAP.2012.2186224
14. Fan, S. T., et al., "Bandwidth enhancement of a printed slot antenna with a pair of parasitic patches," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 1230-1233, 2012.
doi:10.1109/LAWP.2012.2224311