Title :
Evanescent-mode dielectric metamaterial structure excited by NRD guide and its application to leaky wave antenna
Author :
Michishita, Naobumi ; Ueda, Tetsuya ; Lai, Anthony ; Itoh, Tatsuo
Author_Institution :
Univ. of California, Los Angeles
Abstract :
The end coupling between the 1-D DR-based CRLH TL and a NRD guide has been proposed and investigated for impedance matching. Numerical simulations confirmed that the impedance matching can be realized for both the balanced and unbalanced CRLH TLs with the NRD guide feed. A leaky wave antenna based on the 1-D CRLH TL fed by NRD guide was designed, and the numerical and measured radiation patterns are used to verify the leaky backward wave propagation along the designed CRLH TL structure. The evanescent-mode CRLH TL has potential as a low-loss circuit in the millimeter-wave region and beyond.
Keywords :
antenna feeds; antenna radiation patterns; coupled transmission lines; dielectric materials; electromagnetic wave propagation; impedance matching; leaky wave antennas; metamaterials; nonradiative dielectric waveguides; CRLH TL; NRD guide feed; end coupling; evanescent-mode dielectric metamaterial structure; impedance matching; leaky backward wave propagation; leaky wave antenna; low-loss circuit; millimeter-wave region; radiation patterns; Antenna measurements; Antenna radiation patterns; Dielectrics; Feeds; Impedance matching; Leaky wave antennas; Metamaterials; Millimeter wave circuits; Millimeter wave measurements; Numerical simulation;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0877-1
Electronic_ISBN :
978-1-4244-0878-8
DOI :
10.1109/APS.2007.4396002
