Grating lobe suppression of narrow-wall slotted hollow waveguide millimeter-wave planar antenna for arbitrarily linear polarization

被引：36
作者：
Mizutani, Akiyoshi [1 ]
Sakakibara, Kunio
Kikuma, Nobuyoshi
Hirayama, Hiroshi
机构：
[1] Denso Corp, Aichi 4458502, Japan
[2] Nagoya Inst Technol, Dept Comp Sci & Engn, Nagoya, Aichi 4668555, Japan
[3] Nagoya Inst Technol, Dept Comp Sci & Engn, Nagoya, Aichi 4668555, Japan
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2007年 / 55卷 / 02期
关键词：
arrays; millimeter wave antennas; planar arrays; power dividers; slot antennas; waveguides;
D O I：
10.1109/TAP.2006.889815
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：313 / 320
页数：8
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