Didde Sekhar, Dubey Raghvendra Sarvjeet, Panda Sampad Kumar, Babu Gandla Satheesh
Department of ECE, Koneru Lakshmaiah Education Foundation, Greenfields, Vaddeswaram, Guntur, Andhra Pradesh 520002, India.
Department of Electronics & Communication Engineering, Swarnandhra College of Engineering and Technology, Seetharamapuram, Narsapur, Andhra Pradesh 534280, India.
ACS Omega. 2023 Oct 5;8(41):38064-38071. doi: 10.1021/acsomega.3c03983. eCollection 2023 Oct 17.
Miniaturization of microstrip patch antennas (MPAs) is vital in applications such as wireless networks, mobile devices, global positioning satellites, and upcoming wireless terminals. This miniaturization has led to a demand for new materials with higher permittivity compared to the existing ones. Zinc aluminate (ZnAlO) ceramic is an exceptional and versatile material in this context, thanks to its high dielectric permittivity and low tangent loss, making it suitable for microwave applications. This article explores the feasibility of sol-gel-prepared Ca-doped ZnAlO ceramic nanoparticles to be useful in fabricating a MPA. These nanoparticles were examined using X-ray diffraction, which confirmed their polycrystalline structure, and the morphological investigation evidenced the spherical grains having a mean diameter of 16 nm. The dielectric permittivity of the ZnAlOCa nanoparticles is 21.11, with a tangential loss of 0.0247. A prototype MPA made by using Ca-doped ZnAlO nanoparticles showed a return loss of -20.92 dB at a resonance frequency of 6.8 GHz with a bandwidth of 600 MHz. These results indicate that Ca-doped ZnAlO ceramic nanoparticles possess exceptional dielectric characteristics, which make them a promising candidate for MPA applications.
微带贴片天线（MPA）的小型化在无线网络、移动设备、全球定位卫星及即将出现的无线终端等应用中至关重要。这种小型化导致了对与现有材料相比具有更高介电常数的新材料的需求。在这种情况下，铝酸锌（ZnAlO）陶瓷是一种特殊且用途广泛的材料，这得益于其高介电常数和低损耗角正切，使其适用于微波应用。本文探讨了溶胶 - 凝胶法制备的钙掺杂ZnAlO陶瓷纳米颗粒用于制造MPA的可行性。使用X射线衍射对这些纳米颗粒进行了检测，证实了它们的多晶结构，形态学研究表明其球形颗粒的平均直径为16 nm。ZnAlOCa纳米颗粒的介电常数为21.11，损耗角正切为0.0247。使用钙掺杂ZnAlO纳米颗粒制成的MPA原型在6.8 GHz的谐振频率下具有-20.92 dB的回波损耗，带宽为600 MHz。这些结果表明，钙掺杂ZnAlO陶瓷纳米颗粒具有优异的介电特性，这使其成为MPA应用的有前途的候选材料。
