TY - GEN
T1 - THz leaky-wave antenna with high-directivity and beam-steering using CPW CRLH metamaterial resonators
AU - Si, Li Ming
AU - Sun, Hou Jun
AU - Lv, Xin
PY - 2009
Y1 - 2009
N2 - A novel coplanar waveguide (CPW)-based composite right/left-handed (CRLH) structure for terahertz (THz) leaky wave antennas (LWAs) application with high directivity and beam steering capability is introduced. The structure of the CRLH-TL was composed of a slot and embedded resonators termed metamaterial resonators using planar CPW technology. There were three steps involved to design the structure of metamaterial resonator and position distribution of metamaterial resonators in the composite right/left-handed (CRLH) transmission lines. First, equivalent circuit model method (also called "transmission line model method") was used to create an equivalent circuit model of the element of metamaterial resonator. Second, from the equivalent circuit model, it was possible to correspond to two basic equivalent circuit parameters "series impedance and shunt admittance" from artificial transmission line structure "CPW-based metamaterial resonator". Finally, the dimensions of metamaterial resonator were calculated and optimized according to the dispersion diagram. Meanwhile, ohmic loss needs to be considered because it is high at THz wave and above frequency region. The LWAs with CPW-based CRLH could implement high-directivity and backward-to-forward beam steering which differs from the conventional one. A balanced CPW CRLH LWA is designed at the transition frequency of 1485 GHz and performances of high-directivity and wide-angle continuous beam-steering are demonstrated.
AB - A novel coplanar waveguide (CPW)-based composite right/left-handed (CRLH) structure for terahertz (THz) leaky wave antennas (LWAs) application with high directivity and beam steering capability is introduced. The structure of the CRLH-TL was composed of a slot and embedded resonators termed metamaterial resonators using planar CPW technology. There were three steps involved to design the structure of metamaterial resonator and position distribution of metamaterial resonators in the composite right/left-handed (CRLH) transmission lines. First, equivalent circuit model method (also called "transmission line model method") was used to create an equivalent circuit model of the element of metamaterial resonator. Second, from the equivalent circuit model, it was possible to correspond to two basic equivalent circuit parameters "series impedance and shunt admittance" from artificial transmission line structure "CPW-based metamaterial resonator". Finally, the dimensions of metamaterial resonator were calculated and optimized according to the dispersion diagram. Meanwhile, ohmic loss needs to be considered because it is high at THz wave and above frequency region. The LWAs with CPW-based CRLH could implement high-directivity and backward-to-forward beam steering which differs from the conventional one. A balanced CPW CRLH LWA is designed at the transition frequency of 1485 GHz and performances of high-directivity and wide-angle continuous beam-steering are demonstrated.
KW - Composite right/left-handed (CRLH)
KW - Coplanar waveguide (CPW)
KW - Leaky-wave antenna (LWA)
KW - Metamaterial resonators
KW - Terahertz (THZ)
UR - http://www.scopus.com/inward/record.url?scp=70449627767&partnerID=8YFLogxK
U2 - 10.1117/12.834885
DO - 10.1117/12.834885
M3 - Conference contribution
AN - SCOPUS:70449627767
SN - 9780819476661
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 73851O
BT - International Symposium on Photoelectronic Detection and Imaging 2009 - Terahertz and High Energy Radiation Detection Technologies and Applications
T2 - International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications
Y2 - 17 June 2009 through 19 June 2009
ER -