ABSTRACT

The demand for designing antennas having multiband operations along with very compact dimensions is increased recently. Compact and low-profile antennas are required which can be used with multiple communication standards in a portable device. This work presents the smallest form factor multiband antenna, which is very compact, low profile, and covers triple-band for wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications, simultaneously. The proposed smallest form factor antenna comprises two asymmetric meandered-shaped elements and a partial ground plane for triple-band operations. Designed on a standard and low-cost FR4 substrate, the physical size of the antenna is 20 × 20 mm² equivalent to 0.15 λ_° × 0.15 λ_° that has been found to be resonating in three bands, i.e. 2.4–2.53, 3.3–4.15, and 5.13–6.2 GHz. An experimental prototype shows that the antenna is satisfying the WLAN (2.40/5.20/5.80 GHz) bands and WiMAX (3.50/5.50 GHz) frequency bands and exhibits acceptable gain in the passbands, good radiation performance and advantageous radiation patterns in the resonant frequencies. The proposed smallest form factor antenna will establish its place for future wireless communication with its promising compactness and extraordinary performance.

摘要

最近对设计具有多频带操作以及非常紧凑的尺寸的天线的需求增加了。需要可在便携式设备中与多种通信标准一起使用的紧凑型和薄型天线。这项工作提出了最小的外形尺寸多频带天线，它非常紧凑、低调，同时涵盖无线局域网 (WLAN) 的三频带和微波接入 (WiMAX) 应用的全球互操作性。所提出的最小形状因子天线包括两个不对称的曲折形元件和一个用于三频段操作的部分接地平面。设计在标准低成本 FR4 基板上，天线物理尺寸为 20 × 20 mm ²相当于 0.15  λ _°  × 0.15 λ _°已被发现在三个频带中谐振，即2.4–2.53、3.3–4.15 和 5.13–6.2 GHz。实验样机表明，该天线满足WLAN（2.40/5.20/5.80 GHz）频段和WiMAX（3.50/5.50 GHz）频段，通带增益可接受，辐射性能好，谐振频率辐射方向图有利。所提议的最小尺寸天线将以其有前途的紧凑性和非凡的性能为未来的无线通信奠定基础。