A double-side radiating leaky-wave antenna based on composite right/left-handed (CRLH) coplanar-waveguide (CPW) is proposed. Dispersion diagram of the unit cell is investigated, and balanced property is confirmed. Thus, the CRLH leaky-wave antenna can have backfire radiation due to the left-handed property of the CRLH structure and broadside radiation at the balancing frequency point. The measured results show that the proposed antenna can offer a scanning angle covering almost backfire-to-endfire directions.
2. Caloz, C. and T. Itoh, Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications, Wiley, New York, 2005.
3. Rahman, A., Y. Hao, Y. Lee, and C. G. Parini, "Effect of unit-cell size on performance of composite right/left-handed transmission line based leaky-wave antenna," Electronics Letters, Vol. 44, No. 13, 788-790, 2008.
4. Caloz, C. and T. Itoh, "Novel microwave devices and structures based on the transmission line approach of meta-materials," IEEE-MTT Int'l Symp., Vol. 1, 195-198, Jun. 2003.
5. Casares-Miranda, F. P., E. Marquez-Segura, P. Otero, and C. Camacho-Penalosa, "Composite right/left-handed transmission line with wire bonded interdigital capacitor," IEEE Microwave Wireless Compon. Lett., Vol. 16, No. 11, 624-626, Nov. 2006.
6. Gao, J. and L. Zhu, "Characterization of infinite- and finite-extent coplanar waveguide metamaterials with varied left- and right-handed passbands ," IEEE Microwave Wireless Compon. Lett., Vol. 15, No. 11, 805-807, Nov. 2005.
7. Horii, Y., C. Caloz, and T. Itoh, "Super-compact multilayered left-handed transmission line and diplexer application," IEEE Trans. Microwave Theory and Techniques, Vol. 53, No. 4, 1527-1534, Apr. 2005.
8. Yu, A., F. Yang, and A. Z. Elsherbeni, "A dual band circularly polarized ring antenna based on composite right and left handed metamaterials ," Progress In Electromagnetics Research, Vol. 78, 73-81, 2008.
9. Jimenez Martin, J. L., V. Gonzalez-Posadas, J. E. Gonzalez-Garcia, F. J. Arques-Orobon, L. E. Garcia Munoz, and D. Segovia-Vargas, "Dual band high efficiency class CE power amplifier based on CRLH diplexer," Progress In Electromagnetics Research, Vol. 97, 217-240, 2009.
10. De Castro-Galan, D., L. E. Garcia Munoz, D. Segovia-Vargas, and V. Gonzalez-Posadas, "Diversity monopulse antenna based on a dual-frequency and dual mode CRLH rat-race coupler," Progress In Electromagnetics Research B, Vol. 14, 87-106, 2009.
11. Abdelaziz, A. F., T. M. Abuelfadl, and O. L. Elsayed, "Leaky wave antenna realization by composite right/left-handed transmission line," Progress In Electromagnetics Research Letters, Vol. 11, 39-46, 2009.
12. Liu, C. Y. and Q. X. Chu, A novel coplanar-waveguide-based composite right/left-handed transmission line, Microwave and Millimetre-wave Symposium of China, 1324-1326, May 2009.