DOCSLIB.ORG

Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic applied sciences Article Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station Li Hui Dai 1, Chong Tan 2 and Yong Jin Zhou 1,* 1 Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China; [email protected] 2 Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; [email protected] * Correspondence: [email protected] Received: 23 February 2020; Accepted: 31 March 2020; Published: 2 April 2020 Abstract: Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results. Keywords: vivaldi antenna; miniaturized; high gain; surface plasmons; ultrawideband 1. Introduction The fifth-generation (5G) mobile communication systems have found various applications, such as autonomous driving [1], telemedicine [2], and virtual reality [3]. Considering radio wave propagation and available bandwidth, the bands between 3 and 5 GHz have been allocated for 5G services in many regions, such as 3.4–3.8 GHz in Europe, 3.7–4.2 GHz in the USA, and 3.3–3.6 and 4.8–4.99 GHz in China [4]. Hence, in the 2G/3G/4G/5G base station applications, the wide bandwidth covers the 2G, 3G, and 4G bands (1.7–2.7 GHz) and the new sub-6 GHz 5G frequency bands. It is urgent to investigate and design ultra-wideband antennas to cover the aforementioned bands and maintain good impedance matching within the entire frequency bands of interest, with a stable half-power bandwidth (HPBW) and a smaller structure. Crossed dipole antennas are widely used in wireless communication systems due to their advantages of wide bandwidth, stable radiation patterns, and ease of fabrication [5]. Various crossed dipoles were utilized to achieve a wide impedance bandwidth, such as magnetoelectric dipole antennas [6], bow-tie dipole [7], fan-shaped dipole [8], octagonal loop dipole [9], and double-loop dipole [10]. For most of them, the wide impedance bandwidth only covers 2G/3G/4G bands. Furthermore, the antenna profile is not low due to the necessary broadband feeding part. The microstrip antennas have advantages of low profile, light weight, and ease of conformability. However, their impedance bandwidth and isolation are not good enough. Some attractive techniques have been proposed to broaden the impedance bandwidth by using parasitic patches [11], loading H-slot [12] and U-slot [13], using a multiresonant structure [14], and using a fractal structure [15]. Although the shorted-dipoles printed antenna fed by integrated baluns [16] and the dual-band folded dipole antenna [17] cover 2G/3G/4G/5G frequency band, the gain and radiation pattern of these antennas are unstable over the operating frequency band. Another typical ultra-wideband antenna is based on tapered slot technique. As one of the most typical types, Vivaldi antenna was firstly introduced in [18] and has found many applications [19,20]. Appl. Sci. 2020, 10, 2429; doi:10.3390/app10072429 www.mdpi.com/journal/applsci Appl. Sci. 2020, 10, x FOR PEER REVIEW 2 of 9 Appl. Sci. 2020, 10, 2429 2 of 9 Another typical ultra-wideband antenna is based on tapered slot technique. As one of the most typical types, Vivaldi antenna was firstly introduced in [18] and has found many applications However,[19,20]. However, its sizeis its still size large. is still Surface large. plasmons Surface (SPs)plasmons are collective (SPs) are electron–photon collective electron oscillations–photon confinedoscillations to confined the metal to surface, the metal which surface, are characterizedwhich are characterized by subwavelength by subwavelength confinement confinement and field enhancementand field enhancement in optical spectrumin optical [21 spectrum]. Spoof SPs[21]. could Spoof be SPs obtained could by be constructing obtained by periodic constructing metal surfacesperiodic tometal get the surfaces characteristics to get the of SPscharacteristics in the microwave of SPs frequenciesin the microwave [22,23]. frequenc They haveies been [22,23 explored]. They inhave many been antenna explored applications in many antenna such as holo-graphicapplications such antenna as holo [24,25-gr],aphic metasurface antenna planar [24,25], lenses metasurface [26,27], andplanar metasurface lenses [26 superstrate,27], and metasurface [28,29]. It has superstrate been shown [28 that,29 by]. loadingIt has been plasmonic shown metamaterials, that by loading the antennaplasmonic can metamaterials, be efficiently miniaturizedthe antenna can [30 ].be efficiently miniaturized [30]. Here,Here, byby loadingloading plasmonicplasmonic metamaterials, a modif modifiedied antipodal Vivaldi antenna (AVA) isis designeddesigned andand measured, measured which, which is composedis composed of the ofAVA the andAVA the and loaded the periodicloaded slots.periodic The slots designed. The operatingdesigned operating frequency frequency is from 1.8 is GHz from to 1.8 6 GHz,GHz whichto 6 GHz covers, which 2G/ 3Gcovers/4G/5G 2G/3G/4G/5G frequency band. frequency The simulatedband. The resultssimulated and measuredresults and results measured agree re well.sults It agree shows well. that It the shows radiation that patternthe radiation of the plasmonicpattern of AVAthe plasmonic is stable and AVA the is average stable and gain the is 7.24average dBi overgain is the 7.24 operating dBi over frequency the operating band. frequency band. 2.2. Methods and Principles TheThe typicaltypical monopolemonopole antenna antenna and and the the plasmonic plasmonic monopole monopole antenna antenna are are illustrated illustrated in Figurein Figure1a. Usually,1a. Usually the, plasmonicthe plasmonic monopole monopole antenna antenna is composed is composed of the of corrugated the corrugated monopole monopole antenna antenna with grooveswith grooves along along the metal the metal wire. wire. Here, Here we use, we meanderuse meander wires wires to simulate to simulate the etheffects effects of the of groovesthe grooves for simplicity.for simplicity The. dispersionThe dispersion relations relations of both o antennasf both antennas are calculated are calculated and plotted and in plotted Figure 1inb. WhenFigure the1b. grooveWhen the depth grooveb is 0depth mm, itb is is 0 the mm, typical it is the monopole typical antenna.monopole From antenna. Figure From1b, it Figure can be 1b seen, it can that be when seen thethat groove when depththe groove is increased depth (fromis increased 0 mm to(from 3.6 mm), 0 mm the to corresponding 3.6 mm), the asymptoticcorresponding frequencies asymptotic are decreasedfrequencies and are the decreased dispersion and curves the dispersion are lowered. curves It canare lower be concludeded. It can that be concluded when the wavethat when vector theβ iswave fixed, vector the operating β is fixed, frequency the operating is lower frequency for the plasmonicis lower for monopole the plasmonic antenna monopole with deeper antenna grooves. with Hence,deeper thegrooves electrical. Hence, size ofthe the electrical plasmonic size monopole of the plasmonic antenna would monopole be smaller, antenna compared would withbe smaller, that of thecompar traditionaled with monopole that of the antenna. traditional monopole antenna. FigureFigure 1.1. ((aa)) The The typical typical and and plasmonic plasmonic monopole monopole antenna. antenna The. T dimensionshe dimension of thes of antennas:the antennah =s25: h mm= 25, amm,= 0.65 a = mm,0.65 bmm,= 1.4 b = mm, 1.4 mm, and rand= 0.5 r = mm. 0.5 mm. (b) The (b) The dispersion dispersion relations relations of both of both antennas. antennas. TheThe eefficienciesfficiencies ofof the the typical typical and and plasmonic plasmonic monopole monopole antennas antennas are are calculated calculated and and illustrated illustrated in Figurein Figure2. Figure 2. Figure2b shows 2b shows the e ffitheciencies efficiencies of the of plasmonic the plasmonic monopole monopole antenna antenna with di ffwitherent different groove depthsgroove fromdepths 1 mm from to 1 4 mm mm. to From 4 mm Figure. From2b, Figure it can be2b, seen it can that be the seen operating that the frequenciesoperating frequencies red-shifts (correspondingred-shifts (corresponding to longer wavelengths) to longer wavelengths) when the groove when depththe groove is increased depth foris increase the fixedd heightfor the of fixed the monopoleheight of the antenna monopole (25 mm). antenna Especially, (25 mm) the. Especially, efficiency curvesthe efficiency corresponding curves corresponding to three typical to groove three depthstypical aregroove plotted depths in Figure are 2plottedc. It can in be Figure clearly 2c observed. It can be that clearly the central observed operating that the frequency central red-shiftsoperating whenfrequency the groovered-shifts depth whenb is the 0 mmgroove (typical depth monopole b is 0 mm antenna),(typical monopole 1.4 mm, andantenna) 3.6 mm,, 1.4 respectively.mm, and 3.6 Meanwhile,mm, respectively. we can Meanwhile, observe that we there can is observe an optimized that there efficiency is an whenoptimized tuning efficiency the groove when depth. tuning Hence, the itgroove indicates depth. that Hence, the plasmonic it indicates theory that providesthe plasmonic a scheme theory for provides miniaturization a scheme and for optimizationminiaturization of theand antenna. optimization of the antenna. Appl. Sci. 2020, 10, x FOR PEER REVIEW 3 of 9 Appl. Sci. 2020, 10, 2429 3 of 9 Appl. Sci. 2020, 10, x FOR PEER REVIEW 3 of 9 Figure 2. (a) The efficiencies of the typical monopole antenna with different lengths (h); (b) the efficiencies of the plasmonic monopole antenna with different groove depths (h = 25 mm); and (c) the Figure 2.
Load more

Recommended publications
  • Vivaldi Antenna for Rf Energy Harvesting
    666 J. SCHNEIDER, M. MRNKA, J. GAMEC, ET AL., VIVALDI ANTENNA FOR RF ENERGY HARVESTING Vivaldi Antenna for RF Energy Harvesting Jan SCHNEIDER1, Michal MRNKA 2, Jan GAMEC1, Maria GAMCOVA1, Zbynek RAIDA2 1 Dept. of Electronics and Multimedia Communications, Technical University of Košice, Park Komenského 13, 041 20 Košice, Slovak Republic 2 Dept. of Radio Electronics, Brno University of Technology, Technická 12, 616 00 Brno, Czech Republic [email protected], [email protected], [email protected], [email protected], [email protected] Manuscript received November 13, 2015 Abstract. Energy harvesting is a future technology for capturing ambient energy from the environment to be recy- cled to feed low-power devices. A planar antipodal Vivaldi antenna is presented for gathering energy from GSM, WLAN, UMTS and related applications. The designed antenna has the potential to be used in energy harvesting systems. Moreover, the antenna is suitable for UWB appli- cations, because it operates according to FCC regulations (3.1–10.6 GHz). The designed antenna is printed on Fig. 1. Block diagram of the energy harvesting system. ARLON 600 substrate and operates in frequency band The antennas for energy harvesting may be divided from 0.810 GHz up to more than 12 GHz. Experimental into several categories by the operating frequency band. results show good conformity with simulated performance. The 900 MHz slot-dipole antenna on a flexible substrate was discussed in [4]. In [5], the slot-dipole antenna was improved and integrated with energy harvesting circuit. Due to the narrow-band operation and the directive radia- Keywords tion, the slot-dipole antenna harvests energy from one RF energy harvesting, UWB, Vivaldi antenna source only.
    [Show full text]
  • Frequency Reconfigurable Vivaldi Antenna with Switched Resonators for Wireless Applications
    (IJACSA) International Journal of Advanced Computer Science and Applications, Vol. 10, No. 5, 2019 Frequency Reconfigurable Vivaldi Antenna with Switched Resonators for Wireless Applications 1 4 Rabiaa Herzi , Ali Gharsallah Mohamed-Ali Boujemaa2, Fethi Choubani3 Unit of Research CSEHF Faculty of Sciences of Tunis INNOVCOM Laboratory, SUPCOM, University of El Manar, Tunis 2092, Tunisia Carthage, Tunis, Tunisia Abstract—In this paper, a frequency reconfigurable Vivaldi There are many types of frequency reconfigurable antenna with switched slot ring resonators is presented. The antennas such as switching between different narrow bands, principle of the method to reconfigure the Vivaldi antenna is wideband to notch band reconfiguration, wideband to based on the perturbation of the surface currents distribution. narrowband switching [10-11]. Switched ring resonators that act as a bandpass filter are printed in specific positions on the antenna metallization. This structure Achieving an antenna which has the capacity of wideband has the ability to reconfigurate between wideband mode and four to multi-narrow bands reconfiguration is very important and narrow-band modes which cover significant wireless essential for several applications such as a cognitive radio that applications. Combination of the bandpass filters and tapered uses wideband sensing and multi-bands communications [10, slot antenna characteristics achieve an agile antenna capable to 12, 13]. operate in UWB mode from 2 to 8 GHz and to generate multi- narrow bands at 3.5 GHz, 4GHz, 5.2 GHz, 5.5 GHz, 5.8 GHz and Because of their better radiation performances as well as 6.5 GHz. The measurement and simulation results show good Ultra-wide bandwidth, elevated gain, and compact structure agreement.
    [Show full text]
  • Amorphous Silicon Solar Vivaldi Antenna
    Technological University Dublin ARROW@TU Dublin Articles School of Electrical and Electronic Engineering 2016-3 Amorphous Silicon Solar Vivaldi Antenna Oisin O'Conchubhair Technological University Dublin Kansheng Yang Technological University Dublin Patrick McEvoy Technological University Dublin, [email protected] See next page for additional authors Follow this and additional works at: https://arrow.tudublin.ie/engscheleart2 Part of the Electrical and Electronics Commons, Electromagnetics and Photonics Commons, and the Electronic Devices and Semiconductor Manufacturing Commons Recommended Citation O'Conchubhair, O., Yang, K, McEvoy, P & Ammann, Max. (2016) Amorphous Silicon Solar Vivaldi Antenna, IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 893-896. doi: 10.1109/LAWP.2015.2479189. This Article is brought to you for free and open access by the School of Electrical and Electronic Engineering at ARROW@TU Dublin. It has been accepted for inclusion in Articles by an authorized administrator of ARROW@TU Dublin. For more information, please contact [email protected], [email protected]. This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License Funder: Part funded by the Irish Higher Education Authority Authors Oisin O'Conchubhair, Kansheng Yang, Patrick McEvoy, and Max Ammann This article is available at ARROW@TU Dublin: https://arrow.tudublin.ie/engscheleart2/196 > REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 1 Amorphous Silicon Solar Vivaldi Antenna Oisin O’Conchubhair, Kansheng Yang, Patrick McEvoy, Senior Member, IEEE and Max J. Ammann, Senior Member, IEEE A 2.4 - 2.46 GHz Vivaldi antenna made of copper produced Abstract— An ultra-wideband solar Vivaldi antenna is a 0 dBi gain to feed a rectifier [8].
    [Show full text]
  • Miniaturized Antipodal Vivaldi Antenna with Improved Bandwidth Using Exponential Strip Arms
    electronics Article Miniaturized Antipodal Vivaldi Antenna with Improved Bandwidth Using Exponential Strip Arms Mohammad Mahdi Honari * , Mohammad Saeid Ghaffarian and Rashid Mirzavand Intelligent Wireless Technology Laboratory, Electrical and Mechanical Engineering Department, University of Alberta, 9211 116 Street NW, Edmonton, AB T6G 1H9, Canada; [email protected] (M.S.G.); [email protected] (R.M.) * Correspondence: [email protected] Abstract: In this paper, a miniaturized ultra-wideband antipodal tapered slot antenna with exponen- tial strip arms is presented. Two exponential arms with designed equations are optimized to reduce the lower edge cut-off frequency of the impedance bandwidth from 1480 MHz to 720 MHz, resulting in antenna miniaturization by 51%. This approach also improves antenna bandwidth without com- promising the radiation characteristics. The dimension of the proposed antenna structure including the feeding line and transition is 158 × 125 × 1 mm3. The results show that a peak gain more than 1 dBi is achieved all over the impedance bandwidth (0.72–17 GHz), which is an improvement to what have been reported for antipodal tapered slot and Vivaldi antennas with similar size. Keywords: antipodal Vivaldi antenna (AVA); tapered slot antenna (TSA); ultra-wideband (UWB) 1. Introduction Due to the rapid development of wireless communication, ultra-wideband anten- nas/systems are becoming highly attractive in many wideband applications, such as broad Citation: Honari, M.M.; Ghaffarian, band wireless communications, ultra-wideband interference, and imaging systems [1,2]. M.S.; Mirzavand, R. Miniaturized They can be used in electromagnetic compatibility (EMC) test and measurement of emerg- Antipodal Vivaldi Antenna with ing wireless technology devices and UWB security radar detection [3].
    [Show full text]
  • A Compact High-Gain Vivaldi Antenna with Improved Radiation Characteristics
    Progress In Electromagnetics Research Letters, Vol. 68, 127–133, 2017 A Compact High-Gain Vivaldi Antenna with Improved Radiation Characteristics Jingya Zhang, Shufang Liu*, Fusheng Wang, Zhanbiao Yang, and Xiaowei Shi Abstract—In this paper, a miniaturized Vivaldi antenna for C- to X-bands is proposed and fabricated. An H-Shaped Resonator (HSR) and transverse slot structures are employed in this design, which improve the gain through the entire band, especially at the high frequency band. These simulated results show that the modified Vivaldi antenna has a maximum gain increment of 4 dBi and peak gain of 9.9 dBi. Furthermore, the modified Vivaldi antenna has narrower half-power beam width (HPBW), higher front- to-back ratio (FBR) and better radiation characteristics. The measured results are in good agreement with the simulated ones. 1. INTRODUCTION Vivaldi antenna, a broadband antenna that was originally introduced by Gibson in 1979, not only satisfies the requirement of UWB, but also has a planar structure, low profile and high efficiency in contrast to other UWB antennas [1]. However, the most referenced antennas are relatively large in size [2], which cannot fit our need for the limited space. In recent years, with the miniaturization of the Vivaldi antenna, the gain decreases sharply [3, 4]. In [3], the small antipodal Vivaldi antenna has a wide bandwidth from 3.1 to 10.6 GHz, but this design is at the cost of low gain, whose gain is only 5.2 dBi. In order to improve the gain, some approaches have been proposed. Using array of Vivaldi antenna [5] is the conventional way to obtain high gain, but it is complicated and bulky for compact wireless systems.
    [Show full text]
  • Ultra-Wideband Diversity MIMO Antenna System for Future Mobile Handsets
    sensors Article Ultra-Wideband Diversity MIMO Antenna System for Future Mobile Handsets Naser Ojaroudi Parchin 1,* , Haleh Jahanbakhsh Basherlou 2 , Yasir I. A. Al-Yasir 1 , Ahmed M. Abdulkhaleq 1,3 and Raed A. Abd-Alhameed 1,4 1 Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK; [email protected] (Y.I.A.A.-Y.); [email protected] (A.M.A.); [email protected] (R.A.A.-A.) 2 Bradford College, West Yorkshire, Bradford BD7 1AY, UK; [email protected] 3 SARAS Technology Limited, Leeds LS12 4NQ, UK 4 Department of Communication and Informatics Engineering, Basra University College of Science and Technology, Basra 61004, Iraq * Correspondence: [email protected]; Tel.: +44-734-143-6156 Received: 12 March 2020; Accepted: 14 April 2020; Published: 22 April 2020 Abstract: A new ultra-wideband (UWB) multiple-input/multiple-output (MIMO) antenna system is proposed for future smartphones. The structure of the design comprises four identical pairs of compact microstrip-fed slot antennas with polarization diversity function that are placed symmetrically at different edge corners of the smartphone mainboard. Each antenna pair consists of an open-ended circular-ring slot radiator fed by two independently semi-arc-shaped microstrip-feeding lines exhibiting the polarization diversity characteristic. Therefore, in total, the proposed smartphone antenna design contains four horizontally-polarized and four vertically-polarized elements. The characteristics of the single-element dual-polarized UWB antenna and the proposed UWB-MIMO smartphone antenna are examined while using both experimental and simulated results.
    [Show full text]
  • A Wideband End-Fire Conformal Vivaldi Antenna Array Mounted on a Dielectric Cone Zengrui Li Communication University of China
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Department of Electrical & Computer Engineering, Department of Electrical and Computer Engineering 2016 A Wideband End-Fire Conformal Vivaldi Antenna Array Mounted on a Dielectric Cone Zengrui Li Communication University of China Xiaole Kang Communication University of China, [email protected] Jianxun Su Communication University of China Qingxin Guo Communication University of China Yaoqing (Lamar) Yang University of Nebraska - Lincoln, [email protected] See next page for additional authors Follow this and additional works at: https://digitalcommons.unl.edu/electricalengineeringfacpub Part of the Computer Engineering Commons, and the Electrical and Computer Engineering Commons Li, Zengrui; Kang, Xiaole; Su, Jianxun; Guo, Qingxin; Yang, Yaoqing (Lamar); and Wang, Junhong, "A Wideband End-Fire Conformal Vivaldi Antenna Array Mounted on a Dielectric Cone" (2016). Faculty Publications from the Department of Electrical and Computer Engineering. 498. https://digitalcommons.unl.edu/electricalengineeringfacpub/498 This Article is brought to you for free and open access by the Electrical & Computer Engineering, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Department of Electrical and Computer Engineering by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors Zengrui Li, Xiaole Kang, Jianxun Su, Qingxin Guo, Yaoqing
    [Show full text]
  • A Small UWB Tapered Slot Antenna Design for Microwave Imaging System
    International Journal of Latest Engineering and Management Research (IJLEMR) ISSN: 2455-4847 www.ijlemr.com || Volume 06 - Issue 03 || March 2021 || PP. 01-06 A Small UWB Tapered Slot Antenna Design for Microwave Imaging System Swathiga Guruswamy1, Ramya Chinniah2, Kesavamurthy Thangavelu3 1(Research Scholar, ECE Department, PSG College of Technology, India) 2,3(Associate Professor, ECE Department, PSG College of Technology, India) Abstract: The main challenge present in microwave imaging applications is to retrieve the information that a sensitive microwaves carry. The characteristics of the antenna is known to have a direct impact on the imaging system’s performance. In this manuscript, a novel UWB Vivaldi Antenna embedded with rectangular,semicircular slots and a sequence of director elements is designed. Theproposed antenna is designed with the optimized size of 50×48.23mm2 to achievesatisfactory impedance matchingand good radiation characteristics in the frequency band from 2.9 GHz- 11 GHz. The loading of slots and passive directors helps to concentrate the field towards the radiation aperture and thereby helps in increasing the gain. The antenna exhibits a stable radiation pattern and the gain between 2-7.8 dB in the operating frequency band. Besides, the time domain analysis shows the proposed antenna exhibits a flat group delay and a high-fidelity factor. Keywords: Vivaldi Antenna, Microwave Imaging, Ultra-Wide Bandwidth I. INTRODUCTION The MicrowaveImaging (MWI) system consists of transmitting and receiving antennas that surrounds the object of interest. The antennas are the ultimate part of the system and therefore have a huge impact on the resulting image quality [1]. The type of antenna used in the imaging system is deeply impacted by the frequency range, dielectric characteristics, target, and the immersion medium.
    [Show full text]
  • Wide Band Embedded Slot Antennas for Biomedical, Harsh Environment, and Rescue Applications
    University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 5-2015 Wide Band Embedded Slot Antennas for Biomedical, Harsh Environment, and Rescue Applications Yun Seo Koo University of Tennessee - Knoxville, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Part of the Biomedical Commons, and the Electromagnetics and Photonics Commons Recommended Citation Koo, Yun Seo, "Wide Band Embedded Slot Antennas for Biomedical, Harsh Environment, and Rescue Applications. " PhD diss., University of Tennessee, 2015. https://trace.tennessee.edu/utk_graddiss/3379 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Yun Seo Koo entitled "Wide Band Embedded Slot Antennas for Biomedical, Harsh Environment, and Rescue Applications." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Electrical Engineering. Aly E. Fathy, Major Professor We have read this dissertation and recommend its acceptance: Syed K. Islam, Seddik M. Djouadi, Seung J. Baek Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Wide Band Embedded Slot Antennas for Biomedical, Harsh Environment, and Rescue Applications A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Yun Seo Koo May 2015 Copyright © 2015 by Yun Seo Koo.
    [Show full text]
  • Design, Development and Fabrication of Patch Compensated Wideband Vivaldi Antenna and Its Analysis in Radome Chamber
    Design, Development and Fabrication of Patch Compensated Wideband Vivaldi Antenna and Its Analysis in Radome Chamber A Dissertation submitted towards the partial fulfilment of requirement for the award of degree of MASTER OF ENGINEERING IN WIRELESS COMMUNICATION Submitted by Rajveer Dhawan Roll No. 801463020 Under the guidance of Dr. Vinay Kumar Assistant Professor, ECED Thapar University, Patiala ELECTRONICS AND COMMUNICATION ENGINEERING DEPARTMENT THAPAR UNIVERSITY (Established under the section 3 of UGC Act, 1956) PATIALA – 147004, PUNJAB, INDIA JULY-2016 i ii ABSTRACT Design, development and fabrication of micro-stripline based Vivaldi Antenna for frequency range of 5.5-8.5 GHz has been presented. The Vivaldi antenna is a planner antenna, fabricated at micro-strip by having an exponentially tapered slot profile on it. A parametric study is done to clearly understand the antenna design and parametric variation effects on the radiation pattern. After that an optimized computer aided design has been developed and simulated where the results obtained are for the desired radiation parameters in terms of the VSWR, directionality, beam-width and bandwidth. The optimized design has been fabricated and tested. Wherever results are not found in agreement to simulation; problem has been comprehensively investigated and analysed. This is found associated with discontinuity at feed line, fabrication tolerance constraints and parasitic capacitance at edges or bent of micro-stripline which introduce the parasitic reactance in antenna design. A generalized theoretical procedure has been developed which explores that the associated problems can be compensated by incorporating inductive patch on feed line. The developed theory is applied in fabrication and effectively compensated the associated problems where test results are found in good agreement with simulation results.
    [Show full text]
  • Design of Compact Vivaldi Antenna Arrays for Uwb See Through Wall Applications
    Progress In Electromagnetics Research, PIER 82, 401–418, 2008 DESIGN OF COMPACT VIVALDI ANTENNA ARRAYS FOR UWB SEE THROUGH WALL APPLICATIONS Y. Yang, Y. Wang, and A. E. Fathy EECS Department University of Tennessee 1508 Middle Drive, Knoxville, TN 37996, USA Abstract—Two different types of Vivaldi antenna arrays have been designed for UWB see through wall applications. The first is a 16 × 1 antipodal Vivaldi antenna covering 8–12 GHz, and the second is an 8×1 tapered slot antenna for 2–4 GHz frequency range. The array elements are optimized to have a compact size and almost constant gain with frequency. Wilkinson power dividers were designed and fabricated to compose the feed network for the Vivaldi antenna arrays. Measured results of the manufactured antipodal and tapered slot Vivaldi antenna arrays are in excellent agreement with the simulated ones, with a gain of more than 13dBi and 12 dBi respectively within their respective operating band. The first array is geared towards see through dry wall with high resolution, while the second is designed at lower frequencies to allow see through concrete wall applications. Full arrays were manufactured and connected to multi-throw switches and have been utilized as part of synthetic aperture radar. 1. INTRODUCTION For See-Through-Wall (STW) application, the transmitting and receiving antennas must be compact and lightweight for portability. Besides the requirements on their physical size, the antenna must be able to transmit UWB pulses with minimal distortion [1, 2]. The antenna radiation pattern needs to be accounted for — since significant image distortion might be seen due to the radiation pattern angle dependence.
    [Show full text]
  • Radio Frequency (Rf) Energy Harvesting Using
    University of Wollongong Research Online University of Wollongong in Dubai - Papers University of Wollongong in Dubai 2018 Radio frequency (Rf) energy harvesting using metamaterial structure for antenna/rectenna communication network: A review Nornikman Hassan Universiti Teknikal Malaysia Melaka Badrul Ahmad Universiti Teknikal Malaysia Melaka Mohd Fareq Abdul Malek University of Wollongong in Dubai, [email protected] Mohamad Zoinol Abi Aziz Universiti Teknikal Malaysia Melaka Hamizan Abu Bakar Universiti Teknikal Malaysia Melaka, [email protected] See next page for additional authors Publication Details Hassan, N., Ahmad, B. Hisham., Abd Malek, M. Fareq., Aziz, M. Zoinol Abidin Abd., Bakar, H., Azizi, M. Syafiq oorN . & Ismail, M. Khairy. 2018, 'Radio frequency (Rf) energy harvesting using metamaterial structure for antenna/rectenna communication network: A review', Journal of Theoretical and Applied Information Technology, vol. 96, no. 6, pp. 1538-1550. Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library: [email protected] Authors Nornikman Hassan, Badrul Ahmad, Mohd Fareq Abdul Malek, Mohamad Zoinol Abi Aziz, Hamizan Abu Bakar, Muhammad Syafiq ooN Azizi, and M Ismail This journal article is available at Research Online: http://ro.uow.edu.au/dubaipapers/976 Journal of Theoretical and Applied Information Technology 31st March 2018. Vol.96. No 6 © 2005 – ongoing JATIT & LLS ISSN: 1992-8645 www.jatit.org E-ISSN: 1817-3195 RADIO FREQUENCY
    [Show full text]