Series-Fed Millimeter-Wave Antenna Array Based on Microstrip Line Structure
Series-Fed Millimeter-Wave Antenna Array Based on Microstrip Line Structure
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DOI：
10.1109/ojap.2023.3248610
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发表时间：
2023
影响因子：
4
通讯作者：
Sumin David Joseph;E. Ball
中科院分区：
文献类型：
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作者：
Sumin David Joseph;E. Ball
提出了一种低副瓣毫米波串馈微带线天线阵。在毫米波波束形成应用中，要求串联馈电阵列具有很小的水平宽度和很低的旁瓣。建议的阵列由一个微带线周期性地放置在一个引导波长间隔的阶梯状倒锥短截线部分。在理想微带线的两边对称地引入半波长偏移的倒锥短截线，可以改变每个波导波长处的表面电流抵消。通过控制倒锥形短截线部分的尺寸和位置，可以改变等效表面电流并将其聚焦在锥形短截线部分上，从而产生有效的阵列辐射。制作的天线阵列谐振频率为28 GHz，阻抗带宽为1.3 GHz。在28 GHz时实现的峰值增益为10.2 dBi，在E和H平面测得的旁瓣电平优于−15 dB。所提出的具有低旁瓣的微带线天线阵列还受益于简单的制造和高集成能力，这使得它在毫米波段的紧凑波束形成方案中具有吸引力。
This paper presents a millimeter wave series-fed microstrip line antenna array with low side lobes. For millimeter-wave beam forming applications, compact series fed arrays with very small horizontal width and low side lobes are very much required. The proposed array consists of a microstrip line with periodically placed stepped inverted-cone stub sections at a guided wavelength spacing. Surface current cancellation at each guided wavelength in an ideal microstrip line can be altered by symmetrically introducing the inverted-cone stub sections on two edges with a half wavelength offset. By controlling the dimensions and location of the inverted-cone stub sections, the equivalent surface currents can be altered and focused on the cone stub sections, resulting in an effective array radiation. The fabricated antenna array is resonating at 28 GHz and has an impedance bandwidth of 1.3 GHz. Peak realized gain of 10.2 dBi is achieved at 28 GHz and the measured side lobe levels are better than −15 dB in the E and H plane. The proposed microstrip line antenna array with low side lobes also benefits from simple fabrication and high integration ability, which makes it attractive for compact beamforming scenarios in millimeter-wave bands.