DocumentCode :
1366419
Title :
Millimeter-Wave Substrate Integrated Waveguide Long Slot Leaky-Wave Antennas and Two-Dimensional Multibeam Applications
Author :
Cheng, Yu Jian ; Hong, Wei ; Wu, Ke ; Fan, Yong
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Volume :
59
Issue :
1
fYear :
2011
Firstpage :
40
Lastpage :
47
Abstract :
Two types of substrate integrated waveguide (SIW) long slot leaky-wave antennas with controllable sidelobe level are proposed and demonstrated in this paper. The first prototype is able to achieve an excellent sidelobe level of -27.7 dB by properly meandering a long slot etched on the broadside of a straight SIW section from the centerline toward the sidewall then back. But it is known that an asymmetrically curved slot would worsen the cross-polar level. To overcome this drawback, a modified leaky-wave antenna is proposed, which has a straight long slot etched on the broadside of a meandering SIW section. It yields an outstanding sidelobe level of -29.3 dB and also improves the cross-polar level by more than 11 dB at 35 GHz. Experimental results agree well with simulations, thus validating our design. Then, a two-dimensional (2-D) multibeam antenna is developed by combining such 14 leaky-wave antennas with an SIW beamforming network (BFN). It has features of scanning both in elevation orientation by varying frequency and in cross-plane direction by using the BFN. Excited at ports 1-10 of such a 2-D multibeam antenna at 35 GHz, angular region of 86.6° in azimuth can effectively be covered by 3 dB beam-width of ten pencil beams. Varying frequency from 33 GHz to 37 GHz, the angular region of 37.5° and 38.9° in elevation can be covered by 3 dB beam-width of those continuous scanning beams excited at ports 6 and 8 respectively.
Keywords :
leaky wave antennas; slot antennas; substrate integrated waveguides; SIW beamforming network; cross-plane direction; elevation orientation; frequency 33 GHz to 37 GHz; long slot leaky-wave antennas; millimeter-wave substrate integrated waveguide antennas; pencil beams; scanning beams; two-dimensional multibeam antenna; varying frequency; Antenna measurements; Antenna radiation patterns; Fabrication; Leaky wave antennas; Shape; Substrates; Frequency scanning antenna; leaky-wave antenna; long slot; low sidelobe level; substrate integrated waveguide (SIW); two-dimensional (2-D) multibeam;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2010.2090471
Filename :
5617222
Link To Document :
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