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A Novel 70 GHz Circularly Polarized Fully-Planar Leaky-Wave Antenna with X-shaped Slots for Millimeter-Wave Radar Applications | ||
| Journal of Modeling and Simulation in Electrical and Electronics Engineering | ||
| دوره 6، شماره 2 - شماره پیاپی 24، شهریور 2026، صفحه 33-41 اصل مقاله (1.05 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/mseee.2026.40021.1241 | ||
| نویسنده | ||
| Yalda Torabi* | ||
| Electrical Engineering Department, University of Zanjan, Zanjan, Iran. | ||
| تاریخ دریافت: 20 آذر 1404، تاریخ بازنگری: 16 بهمن 1404، تاریخ پذیرش: 03 اسفند 1404 | ||
| چکیده | ||
| This paper presents a novel, fully planar circularly polarized periodic leaky-wave antenna (CP-PLWA) designed for wide-beam scanning in the 70 GHz band for millimeter-wave radar applications. A complementary split ring resonator half-mode substrate integrated waveguide (CSRR-HMSIW) feed structure is employed, offering a low-loss, and readily manufacturable implementation. The key innovation is the integration of cascaded X-shaped slots within the radiating patch, which facilitates controlled surface current perturbation and optimized excitation of orthogonal E-field components, resulting in a significantly enhanced circular polarization bandwidth. This design enables backward-to-forward beam scanning while maintaining a fully planar, via-free architecture. Simulated results demonstrate a 20.1% impedance bandwidth (64.4–77.75 GHz), an axial ratio bandwidth exceeding 13.6% (66–75 GHz, AR < 3 dB), and a wide scan angle from –15° to +60°. A gain exceeding 13 dBi (peaking at 16 dBi) is achieved with a simulated radiation efficiency greater than 97%. This compact, fully planar design, fabricated on a Rogers RT/duroid 5880 substrate, advances the state-of-the-art in CP LWAs for 70 GHz millimeter-wave radar systems by simultaneously addressing critical limitations of prior art: achieving wide CP bandwidth in a planar configuration, eliminating fabrication-via complexity, and maintaining high efficiency across a wide scanning range. The proposed antenna offers a promising solution for future high-performance radar applications requiring compact, wideband, and frequency-scanned circularly polarized radiation. | ||
| کلیدواژهها | ||
| Circularly-Polarized (CP)؛ Leaky-Wave Antenna (LWA)؛ Half-Mode Substrate Integrated Waveguide (HMSIW)؛ 70 GHz band؛ Wide-Beam Scanning؛ Planar؛ Metamaterial؛ CSRR | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 134 تعداد دریافت فایل اصل مقاله: 90 |
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