DocumentCode :
1088399
Title :
Grating Lobe Suppression of Narrow-Wall Slotted Hollow Waveguide Millimeter-Wave Planar Antenna for Arbitrarily Linear Polarization
Author :
Mizutani, Akiyoshi ; Sakakibara, Kunio ; Kikuma, Nobuyoshi ; Hirayama, Hiroshi
Author_Institution :
Dept. of Comput. Sci. & Eng., Nagoya Inst. of Technol.
Volume :
55
Issue :
2
fYear :
2007
Firstpage :
313
Lastpage :
320
Abstract :
A high-gain and high-efficiency slotted waveguide planar antenna is developed in the millimeter-wave band. Forty-five degree inclined polarization is required for automotive radar systems. In the design of slotted waveguide array for arbitrarily linear polarization, slot spacing is one guide wavelength which is larger than a wavelength in free space. Consequently, grating lobes appear in the radiation pattern. So, we developed a slotted waveguide planar antenna composed of post-loaded narrow-wall slots and a single-layer alternating-phase feeding circuit. A planar antenna with suppressed grating lobes has been fabricated and its RF performance has been measured. The measured gain is 33.2 dBi and antenna efficiency is 56% at 76 GHz. Grating lobe level is -28.6 dB lower than main lobe level. Since the proposed structure remains simple, the antenna is expected to be manufactured by metal injection molding for low cost
Keywords :
antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; injection moulding; millimetre wave antenna arrays; planar antenna arrays; radar antennas; slot antenna arrays; 76 GHz; automotive radar system; grating lobe suppression; metal injection molding; millimeter-wave band; polarization; post-loaded narrow-wall slots; radiation pattern; single-layer alternating-phase feeding circuit; slot spacing; slotted waveguide planar antenna; Antenna measurements; Arrayed waveguide gratings; Automotive engineering; Hollow waveguides; Millimeter wave radar; Planar arrays; Planar waveguides; Polarization; Radar antennas; Wavelength measurement; Arrays; millimeter wave antennas; planar arrays; power dividers; slot antennas; waveguides;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2006.889815
Filename :
4084795
Link To Document :
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