研究用 Li3MgNbO5 微波介质陶瓷制作的圆柱形介质谐振器天线

Dinesh M A, Vinay Kumar, Raghvendra Kumar, Vibha Rani Gupta, Subramanian Venkatachalam, V. Dayal
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摘要

这项研究旨在利用低温烧结 Li3MgNbO5 微波介质陶瓷作为谐振器,以 HEM11ẟ 模式激发,制造单馈电线圆柱介质谐振器天线(CDRA)。采用传统固态路线合成的陶瓷是一种单相材料,具有 Fm-3m 空间群的立方结构。随后,利用哈基-科尔曼方法对陶瓷的密集圆柱盘在 TE01δ 模式下的微波介电行为进行了表征。介电常数(εr)为 14.4,损耗因子(tan δ)几乎等于 4.01×10-4,温度系数(τf)为 -50.9 ppm/°C。天线设计是利用高频结构模拟器设计软件进行的,采用介质陶瓷作为谐振器,铜带作为馈线,FR4 作为基板。当谐振器放置在基板上 11.75 毫米处时,耦合到天线上的能量最大。利用适当的模拟参数,制造出的 CDRA 共振频率为 7.67 GHz,回波损耗 (S11) 为 -32.64 dB,阻抗带宽为 10.73%。此外,CDRA 的电压驻波比为 1.04,确保了附近的理想阻抗匹配和 810 MHz 的带宽,从而支持高速数据传输。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating a Cylindrical Dielectric Resonator Antenna Fabricated with Li3MgNbO5 Microwave Dielectric Ceramic
This work aims to fabricate a single-feed line Cylindrical Dielectric Resonator Antenna (CDRA) using low-temperature sintered Li3MgNbO5 microwave dielectric ceramic as a resonator, excited in HEM11ẟ mode. The ceramic synthesized using the conventional solid-state route resulted in a single-phase material exhibiting a cubic structure with an Fm-3m space group. The densely packed cylindrical disk of the ceramic was subsequently characterized for its microwave dielectric behaviour in TE01δ mode using the Hakki-Coleman method. The dielectric permittivity (εr) measures 14.4, with a loss factor (tan δ) nearly equal to 4.01×10-4 and a temperature coefficient (τf) of -50.9 ppm/°C. The antenna design was executed using the high-frequency structure simulator design software, utilizing the dielectric ceramic as the resonator, Cu strip as the feedline, and FR4 as the substrate. The maximum energy was coupled to the antenna when the resonator was placed at 11.75 mm on the substrate. The fabricated CDRA, using appropriate simulated parameters, resonated at 7.67 GHz, offering a return loss (S11) of -32.64 dB and an impedance bandwidth of 10.73%. Furthermore, the CDRA displayed a voltage standing wave ratio of 1.04, ensuring a nearby ideal impedance match and a bandwidth of 810 MHz to support high-speed data transmission.
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