scholarly journals Design of Optically Transparent Antenna with Directional Radiation Patterns

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yuan Yao ◽  
Wanzhong Chen ◽  
Xiaodong Chen ◽  
Junsheng Yu
Keyword(s):  
Radiation Pattern ◽  
Impedance Matching ◽  
Frequency Selective Surface ◽  
Radiation Patterns ◽  
Surface Acting ◽  
Dedicated Short Range Communication ◽  
Directional Radiation ◽  
Measurement Results ◽  
Optically Transparent ◽  
Frequency Selective

An optically transparent antenna with directional radiation pattern is proposed in this paper. This antenna consists of a radiation patch above the transparent glass substrate and a frequency selective surface acting as the ground of microstrip antenna on the back of the glass. The frequency selective surface (FSS) performs well as ground in the working frequency range to achieve directional radiation pattern. A SMA connector is used to feed the antenna. The antenna can operate at the on-board dedicated short-range communication band from 5.725 GHz to 5.85 GHz. Simulations and measurements are carried out to study the antenna performances in terms of impedance matching, gain, and radiation patterns. Both of the simulation and measurement results are shown to illustrate the good performance of the proposed antenna. It is very suitable for car network communication scene.

scholarly journals Optically Transparent Tri-Wideband Mosaic Frequency Selective Surface with Low Cross-Polarisation

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 622
Author(s):  
Nur Biha Mohamed Nafis ◽  
Mohamed Himdi ◽  
Mohamad Kamal A Rahim ◽  
Osman Ayop ◽  
Raimi Dewan
Keyword(s):  
Frequency Selective Surface ◽  
Performance Comparison ◽  
Unit Cell ◽  
Frequency Selective Surfaces ◽  
Transportation Services ◽  
Optically Transparent ◽  
Metallic Element ◽  
Frequency Selective ◽  
High Level ◽  
Polycarbonate Substrate

Acquiring an optically transparent feature on the wideband frequency selective surface (FSS), particularly for smart city applications (building window and transportation services) and vehicle windows, is a challenging task. Hence, this study assessed the performance of optically transparent mosaic frequency selective surfaces (MFSS) with a conductive metallic element unit cell that integrated Koch fractal and double hexagonal loop fabricated on a polycarbonate substrate. The opaque and transparent features of the MFSS were studied. While the study on opaque MFSS revealed the advantage of having wideband responses, the study on transparent MFSS was performed to determine the optical transparency application with wideband feature. To comprehend the MFSS design, the evolutionary influence of the unit cell on the performance of MFSS was investigated and discussed thoroughly in this paper. Both the opaque and transparent MFSS yielded wideband bandstop and bandpass responses with low cross-polarisation (−37 dB), whereas the angular stability was limited to only 25°. The transparent MFSS displayed high-level transparency exceeding 70%. Both the simulated and measured performance comparison exhibited good correlation for both opaque and transparent MFSS. The proposed transparent MFSS with wideband frequency response and low cross-polarisation features signified a promising filtering potential in multiple applications.

scholarly journals Optically transparent frequency selective surface based on nested ring metallic mesh

2016 ◽  
Vol 24 (23) ◽  
pp. 26109 ◽  
Author(s):  
Zhengang Lu ◽  
Yeshu Liu ◽  
Heyan Wang ◽  
Yunlong Zhang ◽  
Jiubin Tan
Keyword(s):  
Frequency Selective Surface ◽  
Optically Transparent ◽  
Metallic Mesh ◽  
Frequency Selective

Polarization independent bandstop frequency selective surface for X-band application

Circuit World ◽  
2019 ◽  
Vol 46 (1) ◽  
pp. 25-31
Author(s):  
Kanchana D. ◽  
Radha Sankararajan ◽  
Sreeja B.S. ◽  
Manikandan E.
Keyword(s):  
Frequency Selective Surface ◽  
Transverse Magnetic ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Content Type ◽  
Low Profile ◽  
X Band ◽  
Measurement Results ◽  
Frequency Selective ◽  
Polarization Independent

Purpose A novel low profile frequency selective surface (FSS) with a band-stop response at 10 GHz is demonstrated. The purpose of this designed FSS structure is to reject the X-band (8-12 GHz) for the application of shielding. The proposed FSS structure having the unit cell dimension of 8 × 8 mm2, the miniaturization of the FSS unit cell in terms of λ0 is 0.266 λ0 × 0.266 λ0, where λ0 is free space wavelength. The designed FSS provides 4 GHz bandwidth with insertion loss of 15 dB. The transverse electric (TE) and transverse magnetic (TM) modes of the proposed design are same because of polarization independent characteristics and hold the angularly stable frequency response for both TE and TM mode polarization. Both the simulation and measurement results are in good agreement to each other. Design/methodology/approach The proposed FSS design contains square-shaped PEC material, which is placed on the substrate and the shape of the circle and rectangle is etched over the PEC material. The PEC material of the patch dimension is 0.0175 mm. The substrate used for the proposed design is FR4 lossy with the thickness of 0.8 mm and permittivity εr = 4.3 having a loss tangent of 0.02. Findings To find a new design and miniaturized FSS structure is discussed. Originality/value 100%

Diffractive Characteristics of Optically Transparent Frequency Selective Surface

2013 ◽  
Vol 33 (8) ◽  
pp. 0831001
Author(s):  
于淼 Yu Miao ◽  
高劲松 Gao Jinsong ◽  
徐念喜 Xu Nianxi
Keyword(s):  
Frequency Selective Surface ◽  
Optically Transparent ◽  
Frequency Selective

Yagi-Uda Antenna for Navigational Aids Using HFSS

2017 ◽  
Vol 8 (3) ◽  
pp. 627
Author(s):  
Ramesh P. ◽  
V. Mathivanan
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
High Frequency ◽  
Return Loss ◽  
Impedance Matching ◽  
Radiation Patterns ◽  
Ultra High Frequency ◽  
Navigational Aids ◽  
The Stability ◽  
Uhf Band

<p>In this paper, the ultra high frequency of yagi-uda antenna for navigational has been designed to improve the usable bandwidth by improving the stability of the radiation patterns. The frequency band of ultra high frequency is 300-3000 MHZ. The main aim of this paper is to reduce the loss, improve the gain and also to enhance the efficiency of ultra high frequency yagi-uda antenna for utilizing the navigational aids. The proposed UHF band of Yagi-Uda antenna has been designed by using ANSYS HFSS tool for the application of navigational aids. The characteristics specifications of yagi-uda antenna such as Radiation pattern, S11 (return loss), impedance matching and gain are analyzed in this work.</p>

scholarly journals A Novel Wideband Miniaturized-Element Frequency Selective Surface

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Semyoung Oh ◽  
Hanjun Lee ◽  
Joo-Ho Jung ◽  
Gil-Young Lee
Keyword(s):  
Equivalent Circuit ◽  
Parametric Study ◽  
Equivalent Circuit Model ◽  
Frequency Selective Surface ◽  
Circuit Model ◽  
Operating Mechanism ◽  
Total Thickness ◽  
Measurement Results ◽  
Frequency Selective ◽  
The Operating Mechanism

This letter presents a novel wideband miniaturized-element frequency selective surface (MEFSS). The simulation and measurement results show that the bandwidth of the proposed MEFSS is remarkably enhanced compared to that of an original second-order MEFSS while its size and total thickness are still small. A parametric study is also conducted to understand the operating mechanism of the proposed structure. The phenomenon observed in the parametric study is explained with an equivalent circuit model.

Compact stepped slot antenna for ultra-wideband applications

2021 ◽  
pp. 1-7
Author(s):  
B. Hammache ◽  
A. Messai ◽  
I. Messaoudene ◽  
T. A. Denidni
Keyword(s):  
Radiation Pattern ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Back Side ◽  
Compact Size ◽  
Measurement Results ◽  
Operating Bandwidth ◽  
Uwb Applications

Abstract In this paper, a compact stepped slot antenna for ultra-wideband (UWB) applications is proposed. A very small size and UWB bandwidth operation are achieved by integrating a stepped slot in the back side of the antenna. This stepped slot is excited by using a 50 Ω-feed line in the top side of the antenna. The antenna is characterized by an impedance bandwidth between 3.05 GHz and more than 12 GHz. The dimensions of the antenna are 17 mm × 8 mm × 1.27 mm, which leads to the most compact size compared with other works in the literature. The integrated stepped slot is divided into additional elementary slots, where each elementary slot has a matching point. Adding these elementary slots allows to increase further the operating bandwidth. The radiation pattern of the compact stepped slot antenna is omnidirectional in the H-plane and bidirectional in the E-plane. The measurement results agree well with the simulated ones in terms of impedance matching and radiation pattern.

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