Low-Profile and Wideband Microstrip Antenna Using Quasi-Periodic Aperture and Slot-to-CPW Transition
Low-Profile and Wideband Microstrip Antenna Using Quasi-Periodic Aperture and Slot-to-CPW Transition
复制标题
使用准周期孔径和缝隙到 CPW 转换的薄型宽带微带天线
DOI：
10.1109/tap.2018.2874801
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发表时间：
2019-01-01
影响因子：
5.7
通讯作者：
Chen, Pai-Yen
中科院分区：
文献类型：
--
作者：
Sun, Wangyu;Li, Yue;Chen, Pai-Yen
在这次通信中，我们提出了一种新型紧凑型宽带共面波导（CPW）馈电微带天线。与传统的微带天线非常不同，所提出的设计具有通过缝隙到共面波导过渡馈送的准周期辐射孔径。通过优化准周期孔径和槽到共面波导过渡的几何形状，基本TM<sub>10</sub>模式和反相TM<sub>20</sub>模式可以在较宽的带宽上有效地激发、耦合和匹配。我们已经制造并表征了所提出的天线，并且发现测量结果和仿真结果之间具有良好的一致性。我们的实验结果表明，尽管天线的厚度仅为 <inline-formula> <tex-math notation="LaTeX">$0.052\lambda _{0}$ </tex-math></inline-formula> （<inline-formula> <tex-math notation="LaTeX">$\lambda _{0}$ </tex-math></inline-formula> 是中心频率处的自由空间波长），但具有 36.5% (3.96–5.73 GHz) 的 −10 dB 阻抗带宽、35.4% (4–5.72 GHz) 的 3 dB 增益带宽和 10.45 dBi 的最大可用增益。我们的研究结果可能为使用单层基板实现宽带微带天线提供可行的解决方案，具有独特的优点，例如薄型、低成本和易于制造。
In this communication, we propose a new type of compact and wideband coplanar waveguide (CPW)-fed microstrip antenna. Very different from traditional microstrip antennas, the proposed design has the quasi-periodic radiating aperture fed through the slot-to-CPW transition. By optimizing the geometry of the quasi-periodic aperture and the slot-to-CPW transition, the fundamental TM<sub>10</sub> mode and antiphase TM<sub>20</sub> mode can be efficiently excited, coupled, and matched over a broad bandwidth. We have fabricated and characterized the proposed antenna, and found a good agreement between measurement and simulation results. Our experimental results show that despite the antenna has a thickness of only <inline-formula> <tex-math notation="LaTeX">$0.052\lambda _{0}$ </tex-math></inline-formula> (<inline-formula> <tex-math notation="LaTeX">$\lambda _{0}$ </tex-math></inline-formula> is the free-space wavelength at the center frequency), it exhibits a −10 dB impedance bandwidth of 36.5% (3.96–5.73 GHz), a 3 dB gain bandwidth of 35.4% (4–5.72 GHz), and a maximum available gain of 10.45 dBi. Our findings may offer a feasible solution to realize wideband microstrip antennas using a single-layer substrate, with unique merits, such as low profile, low cost, and ease of fabrication.