A New Broadband Microstrip Leaky – Wave Antenna
Keywords:
A New Broadband Microstrip Leaky – Wave AntennaAbstract
This paper presents a novel design of a curve tapered leaky-wave antenna (LWA). An FDTD code was used to extract the propagation constant of a microstrip LWA and to run a simple algorithm to design its layout. A physical grounding structure along the length of the antenna allows the adoption of a simple feeding planar line and the reduction of sidelobes. Moreover, the proposed design of LWA has interesting performance both for its bandwidth, (up to 33% for VSWR< 2) and for its gain (more than 12 dBi peak power gain at 10.5 GHz), compared with conventional planar microstrip LWAs which work in the same frequency range but with narrower bandwidth (20% VSWR< 2) and peak power gain less than 10 dBi. A prototype of a LWA proposed, was made showing a good agreement between experimental and theoretical results.
Downloads
References
W. Menzel, “A new traveling-wave antenna in
microstrip,” Arch. Elek. Uhertragung. , vol. 33, pp.
-140, 1979.
A. Oliner, “Leakage from higher modes on
microstrip line with application to antennas,” Radio
Science, vol. 22, pp. 907-912, 1987.
G. M. Zelinski, M. L. Hastriter, M. J. Havrilla, J. S.
Radcliffe, A. J. Terzuoli, and G. A. Thiele, “FDTD
analysis of a new leaky traveling wave antenna,”
Wireless Communications and Applied
Computational IEEE/ACES 2005 Intl. Conf .,
pp.152-155, Apr. 2005.
T. Itoh and R. Mittra, “Spectral domain approach for
calculating the dispersion characteristics of
microstrip lines,”IEEE Trans. Microwave Theory
Techn., vol. MTT-21, pp. 496-499, 1973.
E. F. Kuester, R. T. Johnk, and D. C. Chang, “The
thin-substrate approximation for reflection from the
end of a slab-loaded parallel-plate waveguide with
application to microstrip patch antennas,” IEEE
Trans. Antennas and Propagation, vol. AP-30, no. 5,
Sep. 1982.
W. Hong, T. L. Chen, C. Y. Chang, J. W. Sheen, and
Y. D. Lin, “Broadband tapered microstrip leaky-
wave antenna,” IEEE Trans. Antennas and
Propagation, vol. 51, pp. 1922-1928, 2003.
Y. Qian, B. C. C. Chang, T. Itoh, K. C. Chen, and C.
K. C. Tzuang, “High efficiency and broadband
excitation of leaky mode in microstrip structures,”
IEEE MTT-S Microwave Symposium Digest, vol. 4,
pp. 1419-1422, 1999
