发表机构
Liaocheng Key Laboratory of Industrial-Internet Research and Application; Space Engineering University（聊城工业互联网应用研究重点实验室; 航天工程大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种CPW馈电的PIN二极管可重构准八木天线，通过优化二极管位置与开关状态实现X/Ku波段双频及连续频带重构，实测验证了其频率可调性能。
AI 中文摘要
本文提出了一种由共面波导（CPW）馈电的PIN二极管可重构准八木天线，用于X波段和Ku波段的频率重构。PIN二极管被策略性地引入到有源振子与寄生振子之间，以控制有效表面电流路径，从而改变工作频率特性。通过优化二极管的位置、数量及开关状态，实现了两种不同的工作模式。在模式I中，获得了覆盖X波段和Ku波段的双频段工作，仿真阻抗带宽分别为9-11 GHz和12.2-18.8 GHz。在模式II中，实现了从10到14.2 GHz的仿真连续阻抗带宽。模式I和模式II对应的仿真峰值增益分别约为8 dBi和7 dBi。制作了原型样机，并对其S参数进行了实验表征，实测结果证实了所提天线的频率重构行为。进一步研究了PIN二极管数量和位置对阻抗特性的影响，以阐明它们在频率重构和设计复杂度中的作用。所提出的天线提供了一种紧凑的CPW馈电准八木配置，具有PIN控制的X波段和Ku波段频率重构能力。
英文摘要
A PIN-diode-reconfigurable quasi-Yagi antenna fed by a coplanar waveguide (CPW) is presented for X-band and Ku-band frequency reconfiguration. PIN diodes are strategically introduced between the driven and parasitic elements to control the effective surface-current paths and thereby modify the operating frequency characteristics. By optimizing the diode locations, number, and switching states, two distinct operating modes are achieved. In Mode I, dual-band operation covering the X-band and Ku-band is obtained, with simulated impedance bandwidths of 9-11 GHz and 12.2-18.8 GHz. In Mode II, a simulated continuous impedance bandwidth from 10 to 14.2 GHz is achieved. The corresponding simulated peak gains are approximately 8 and 7 dBi for Mode I and Mode II, respectively. A prototype is fabricated and experimentally characterized in terms of its S-parameters, and the measured results confirm the frequency-reconfiguration behavior of the proposed antenna. The effects of the number and placement of the PIN diodes on the impedance characteristics are further investigated to clarify their roles in frequency reconfiguration and design complexity. The proposed antenna provides a compact CPW-fed quasi-Yagi configuration with PIN-controlled X-band and Ku-band frequency reconfiguration.
Comments5 pages, 14 figures
