Title :
Design of a wideband miniature dielectric-filled waveguide antenna for collision-avoidance radar
Author :
Hajian, M. ; Tran, D.P. ; Ligthart, L.P.
Author_Institution :
Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands
fDate :
2/1/2000 12:00:00 AM
Abstract :
This article presents a theoretical and experimental study of the design of a miniaturized wideband dielectric-filled waveguide (DFW) antenna. The operational frequency is X band, i.e., 9.0⩽f⩽10.5 GHz. The desired bandwidth is 1.5 GHz. The antenna uses an air-gap matching network to reduce its high aperture reflection. In order to ease the integration with antenna circuits and to increase the bandwidth, two E-plane steps are used. The antenna is designed to have -3 dB beamwidths of 60° and 100° for the E- and H-plane patterns, respectively. An input reflection of less than -10 dB for the desired bandwidth is observed. The gain of the antenna is 7 dBi. A cross-polar level of less than -25 dB is achieved. This article discusses the mathematical model for input reflection, the design scenarios, and the experimental results
Keywords :
antenna radiation patterns; collision avoidance; dielectric-loaded waveguides; mobile antennas; radar antennas; road vehicle radar; waveguide antennas; 1.5 GHz; 7 dB; 9.0 to 10.5 GHz; E-plane pattern; E-plane steps; H-plane pattern; X band; air-gap matching network; antenna circuits; aperture reflection; bandwidth; collision-avoidance radar; cross-polar level; design; gain; input reflection; wideband miniature dielectric-filled waveguide antenna; Air gaps; Antenna theory; Aperture antennas; Bandwidth; Broadband antennas; Dielectrics; Frequency; Optical reflection; Reflector antennas; Waveguide theory;
Journal_Title :
Antennas and Propagation Magazine, IEEE
