A High Gain and Compact CPW-fed UWB Antenna Based on a Novel Frequency Selective Surface with Angular Stability

IF 1.5 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Fatemeh Zadehparizi
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Abstract

This study presents a compact co-planar waveguide (CPW) ultra-wideband (UWB) antenna integrated with a novel frequency selective surface (FSS) for gain improvement. The novel FSS is created by etching some slots on a square patch and adding different patches during five steps. The presented FSS provides transmission coefficient lower than − 10 dB and reflection coefficient close to 0 dB across the frequency bands of 3–15.7 GHz, and 3.6–15.1 GHz for transverse electric (TE) and transverse magnetic (TM) modes with adequate angular stability, respectively. Angular stability is maintained up to θ = 85° and 40° in the TE and TM planes, respectively. Furthermore, the reflection phase decreases linearly piecewise, making it appropriate for radiation enhancement of the antenna. A 4 × 4 array of the proposed FSS unit cells is positioned below the circular CPW antenna at an optimized distance of 20 mm. Then, to improve the reflection coefficient, a rectangular notch is etching on the radiating patch. The modified structure operates over an impedance bandwidth (S11 < − 10 dB) of 3.4–13.8 GHz for UWB applications with a peak gain of 7.40 dBi at 12.5 GHz. The overall physical and electrical volumes of the proposed antenna are 32 × 32 × 23.2 mm3 and 0.36λL × 0.36λL × 0.26λLL is the wavelength at the lower frequency), respectively that is considerably compact. The proposed antenna is fabricated, and the comparison of the simulated and measured results shows a good agreement.

Abstract Image

基于具有角度稳定性的新型选频表面的高增益紧凑型 CPW 馈电 UWB 天线
本研究介绍了一种与新型频率选择表面(FSS)集成的紧凑型共面波导(CPW)超宽带(UWB)天线,以提高增益。新型 FSS 是通过在方形贴片上蚀刻一些槽并在五个步骤中添加不同的贴片而形成的。该 FSS 在 3-15.7 GHz 和 3.6-15.1 GHz 频段内分别为横向电(TE)和横向磁(TM)模式提供了低于 - 10 dB 的传输系数和接近 0 dB 的反射系数,并具有足够的角度稳定性。在 TE 和 TM 平面上,角度稳定性分别高达 θ = 85° 和 40°。此外,反射相位呈线性片状减小,因此适用于天线的辐射增强。拟议的 FSS 单元阵列为 4 × 4,位于圆形 CPW 天线下方,优化间距为 20 毫米。然后,为了提高反射系数,在辐射贴片上蚀刻了一个矩形缺口。改进后的结构工作在 3.4-13.8 GHz 的阻抗带宽(S11 < - 10 dB)上,适用于 UWB 应用,在 12.5 GHz 时的峰值增益为 7.40 dBi。该天线的物理和电气体积分别为 32 × 32 × 23.2 mm3 和 0.36λL × 0.36λL × 0.26λL (λL 为低频波长),非常紧凑。所提议的天线已经制作完成,模拟结果和测量结果的比较显示出良好的一致性。
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来源期刊
CiteScore
5.50
自引率
4.20%
发文量
93
审稿时长
>12 weeks
期刊介绍: Transactions of Electrical Engineering is to foster the growth of scientific research in all branches of electrical engineering and its related grounds and to provide a medium by means of which the fruits of these researches may be brought to the attentionof the world’s scientific communities. The journal has the focus on the frontier topics in the theoretical, mathematical, numerical, experimental and scientific developments in electrical engineering as well as applications of established techniques to new domains in various electical engineering disciplines such as: Bio electric, Bio mechanics, Bio instrument, Microwaves, Wave Propagation, Communication Theory, Channel Estimation, radar & sonar system, Signal Processing, image processing, Artificial Neural Networks, Data Mining and Machine Learning, Fuzzy Logic and Systems, Fuzzy Control, Optimal & Robust ControlNavigation & Estimation Theory, Power Electronics & Drives, Power Generation & Management The editors will welcome papers from all professors and researchers from universities, research centers, organizations, companies and industries from all over the world in the hope that this will advance the scientific standards of the journal and provide a channel of communication between Iranian Scholars and their colleague in other parts of the world.
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