CST – Computer Simulation Technology

Title:
Double Periodic Composite Right/Left Handed Transmission Line and Its Applications to Compact Leaky-Wave Antennas
Author(s):
Cheng Jin, Arokiaswami Alphones, Makoto Tsutsumi
Source:
IEEE Transactions on Antennas and Propagation
Vol./Issue/Date:
Volume: 59, Issue: 10, October 2011
Year:
2011
Page(s):
3679-3686
Keywords:
Double periodic composite right/left handed transmission line (DP-CRLH TL), left-handed, microstrip line, triple band leaky-wave antenna
Abstract:
A double periodic composite right/left handed transmission line (DP-CRLH TL) is proposed and analyzed based on transmission line theory. Besides the composite right/left handed property, a new leaky-wave radiation is observed at a lower frequency with narrow bandwidth. Dispersion characteristics of the structure are obtained and the cutoff frequencies are investigated by changing the ratio of inductances ?? ??  or capacitances ?? ?? . Experiments are performed using microstrip lines with double periodically loaded shunt shorted-stub inductors and series interdigital capacitors. Frequency response, dispersion behavior and radiation characteristics are measured from the prototype structure and they display the expected novel forward leaky-wave radiation in the direction of   and gain of 4.12 dBi at 1.6 GHz, the left-handed backward radiation in the direction of   and gain of 8.62 dBi at 3.3 GHz, and the conventional right-handed forward radiation in the direction of   and gain of 8.78 dBi at 3.9 GHz.
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