Low-Profile and Broadband Dual-Linearly Polarized Offset Dual-Reflector Antenna for W-Band Applications

IF 4.6 1区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Antennas and Propagation Pub Date : 2024-09-17 DOI:10.1109/TAP.2024.3458183

Thi-Kim-Ngan Nguyen;Jérôme Taillieu;David González-Ovejero;Ronan Sauleau

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Abstract

A low-profile, broadband, dual-linearly polarized offset dual-reflector antenna is presented for high-gain operation at W-band (75–110 GHz). The dual-linear polarization is achieved by exciting two orthogonal modes in an overmoded parallel-plate waveguide (PPW), namely, the quasi-transverse electromagnetic (TEM) mode and the quasi-TE1 mode. The offset dual-reflector system is illuminated by a dual-mode corrugated feed horn in the PPW. Since the reflector system only collimates the beam in one plane, an exponentially flared section is integrated at the end of its radiating aperture to collimate the beam in the orthogonal plane. The antenna is built in aluminum and fabricated as a split block using computer numerical control (CNC) milling. Experimental results show an input reflection coefficient better than −10 dB over a fractional bandwidth exceeding 38% for the two modes of operation. A good agreement is observed between simulated and measured far-field patterns for both operating modes, thus validating the antenna concept. The measured gain remains stable over the entire W-band with a maximum value of 28.8 and 28.5 dBi for the quasi-TEM mode and the quasi-TE1 mode, respectively.

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用于 W 波段应用的扁平宽带双线性偏振偏移双反射器天线

本文介绍了一种用于 W 波段（75-110 GHz）高增益工作的扁平、宽带、双线性极化偏置双反射器天线。双线性极化是通过激发过编码平行板波导（PPW）中的两个正交模式（即准横向电磁（TEM）模式和准 TE1 模式）来实现的。偏置双反射器系统由 PPW 中的双模波纹馈源喇叭照射。由于反射器系统只能在一个平面内准直光束，因此在其辐射孔的末端集成了一个指数扩口部分，以便在正交平面内准直光束。天线由铝制成，并通过计算机数控（CNC）铣削加工成分体块。实验结果表明，在两种工作模式下，输入反射系数优于-10 dB，分数带宽超过 38%。在两种工作模式下，模拟和测量的远场模式都非常吻合，从而验证了天线的概念。在整个 W 波段，测量增益保持稳定，准 TEM 模式和准 TE1 模式的最大值分别为 28.8 和 28.5 dBi。

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来源期刊

IEEE Transactions on Antennas and Propagation 工程技术-电信学

CiteScore

10.40

自引率

28.10%

发文量

968

审稿时长

4.7 months

期刊介绍： IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques