1. Song, Q. and X.-X. Zhang, "A study on wideband gap-coupled microstrip antenna arrays," IEEE Transactions on Antennas and Propagation, Vol. 43, No. 3, 313-317, 1995.
doi:10.1109/8.372003
2. Lee, C. S. and V. Nalbandian, "Impedance matching of a dual-frequency microstrip antenna with an air gap," IEEE Transactions on Antennas and Propagation, Vol. 41, No. 5, 680-682, 1993.
doi:10.1109/8.222288
3. Sze, J.-Y. and K.-L. Wong, "Slotted rectangular microstrip antenna for bandwidth enhancement," IEEE Transactions on Antennas and Propagation, Vol. 48, No. 8, 1149-1152, 2000.
doi:10.1109/8.884481
4. Maci, S., G. B. Gentili, P. Piazzesi, and C. Salvador, "Dual-band slot-loaded patch antenna," IEE Proceedings --- Microwaves, Antennas and Propagation, Vol. 142, No. 3, 225-232, 1995.
doi:10.1049/ip-map:19951932
5. Chai, W.-W., X.-J. Zhang, and S.-G. Liu, "Wideband microstrip antenna array using U-slot," PIERS Online, Vol. 3, No. 7, 1085-1088, 2007.
doi:10.2529/PIERS060906221340
6. Kumar, G., Broadband Microstrip Antennas, Artech House, 2003.
7. Ray, K. P., S. Ghosh, and K. Nirmala, "Compact broadband gap-coupled microstrip antennas," IEEE Antennas and Propagation Society International Symposium 2006, No. 9-14, 3719-3722, 2006.
doi:10.1109/APS.2006.1711430
8. Ramesh, M. and YIP KB, "Design formula for inset fed microstrip patch antenna," Journal of Microwaves and Optoelectronics, Vol. 3, No. 6, 5-10, 2003.
9. Basilio , L. I., M. A. Khayat, J. T. Williams, et al. "The dependence of the input impedance on feed position of probe and microstrip line-fed patch antennas," IEEE Transactions on Antennas and Propagation, Vol. 49, No. 1, 45-47, 2001.
doi:10.1109/8.910528
10. Hu, Y., D. R. Jackson, J. T. Williams, S. A. Long, and K. V. Rajan, "Characterization of the input impedance of the inset-fed rectangular microstrip antenna," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 10, 3314-3318, 2008.
doi:10.1109/TAP.2008.929532