1. Iyer, K. and G. V. Eleftheriades, "Negative refractive index metamaterials supporting 2-D waves," IEEE MTT-S International Microwave Symposium Digest, Vol. 2, 1067-1070, 2002.
2. Caloz, C. and T. Itoh, "Application of the transmission line theory of left-handed (LH) materials to the realization of a microstrip `LH line' ," IEEE-AP-S USNC/URSI National Radio Science Meeting, Vol. 2, 412-415, 2002.
3. Oliner, A. A., "A periodic-structure negative-refractive-index medium without resonant elements," IEEE-AP-S USNC/URSI National Radio Science Meeting, Vol. 2, 41 2002.
4. Liu, L., C. Caloz, and T. Itoh, "Dominant mode (DM) leaky-wave antenna with backfire-to-endfire scanning capability," Electronic Letters, Vol. 38, No. 23, 1414-1416, 2002.
doi:10.1049/el:20020977
5. Iizuka, H., P. S. Hall, and A. L. Borja, "Dipole antenna with left-handed loading," IEEE Antennas and Wireless Propagation Letters, Vol. 5, No. 1, 483-485, 2006.
doi:10.1109/LAWP.2006.883082
6. Borja, A. L., P. S. Hall, Q. Liu, and H. Iizuka, "Omnidirectional loop antenna with left-handed loading," IEEE Antennas and Wireless Propagation Letters, Vol. 6, 495-498, 2007.
doi:10.1109/LAWP.2007.905016
7. Liu, Q., P. S. Hall, and A. L. Borja, "Efficiency of electrically small dipole antennas loaded with left-handed transmission lines," IEEE Transactions on Antennas and Propagation, Vol. 57, 3009-3017, 2009.
doi:10.1109/TAP.2008.2009743
8. Chu, L. J., "Physical limitations of omni-directional antennas," Journal of Applied Physics, Vol. 19, No. 12, 1163-1175, 1948.
doi:10.1063/1.1715038
9. Harrington, R. F., "Effect of antenna size on gain, bandwidth, and efficiency," Journal of Research of the National Bureau of Standards-D. Radio Propagation, Vol. 64, No. 1, 23-27, 1960.
10. Bowick, A., RF Circuit Design, 66-70, Newnes, Burlington, MA, 1982.