Printed Flexible Antenna for Energy Harvesting Do Hanh Ngan Bui

Total Page:16

File Type:pdf, Size:1020Kb

Printed Flexible Antenna for Energy Harvesting Do Hanh Ngan Bui Printed flexible antenna for energy harvesting Do Hanh Ngan Bui To cite this version: Do Hanh Ngan Bui. Printed flexible antenna for energy harvesting. Optics / Photonic. Université Grenoble Alpes, 2017. English. NNT : 2017GREAT062. tel-01721461 HAL Id: tel-01721461 https://tel.archives-ouvertes.fr/tel-01721461 Submitted on 2 Mar 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. THÈSE Pour obtenir le grade de DOCTEUR DE LA COMMUNAUTE UNIVERSITE GRENOBLE ALPES Spécialité : Optique et Radiofréquences Arrêté ministériel : 25 mai 2016 Présentée par Do Hanh Ngan BUI Thèse dirigée par Philippe BENECH Professeur, Université Grenoble-Alpes et codirigée par Tan-Phu VUONG, Professeur, Grenoble INP, et Jacques VERDIER, Maître de conférences, INSA de Lyon préparée au sein du Laboratoire IMEP-LAHC dans l'École Doctorale Électronique, Électrotechnique, Automatique et Traitement du signal (EEATS) Antennes souples imprimables pour la récupération d’énergie de champs électromagnétiques ambiants Thèse soutenue publiquement le 25 Octobre 2017, devant le jury composé de : M. Bruno ALLARD Professeur, INSA de Lyon, Président M. Ke WU Professeur, Polytechnique Montréal, Rapporteur M. Laurent CIRIO Professeur, Université Paris-Est Marne-la-Vallée, Rapporteur Mme. Valérie VIGNERAS Professeur, Institut Polytechnique de Bordeaux, Examinatrice M. Philippe BENECH Professeur, Université Grenoble-Alpes, Membre M. Tan-Phu VUONG Professeur, Grenoble INP, Membre M. Jacques VERDIER Maître de conférences, INSA de Lyon, Membre M. Emmanuel DREINA Docteur, Schneider Electric, Membre M. Gael DEPRES Docteur, Arjowiggins, Membre Remerciements Le travail de thèse a été financé par la région Auvergne Rhône-Alpes dans le cadre du projet ARC4-Energies. Ces travaux de thèse ont été réalisés aux Laboratoire IMEP LAHC à Grenoble et aux Laboratoire AMPERE à Lyon et rattaché à l’Institut Polytechnique de Grenoble. Je tiens à remercier Monsieur Bruno Allard, Professeur de INSA de Lyon, pour l’intérêt porté à mes travaux et m’avoir fait honneur de présider le jury de ma thèse. J’adresse toute ma connaissance à Monsieur Ke Wu, Professeur à Université Polytechnique Montréal – Canada et Monsieur Laurent Cirio, Professeur à Université Paris- Est Marne-la-Valée, qui ont cordialement accepté d’être rapporteurs de ce travail. Un très grand merci à Madame Valérie Vigneras, professeuse à l’Institut Polytechnique de Bordeaux, Monsieur Emmanuel Dreina, docteur de Schneider Electric et Monsieur Gael Depres, docteur d’Arjowiggins Creative, pour avoir accepté d’être membre de jury de ma thèse. Je remercie très chaleureusement mes directeurs de thèse, Monsieur Philippe Benech, Professeur à Université Grenoble Alpes, Monsieur Tan-Phu Vuong, Professeur à l’Institut Polytechnique de Grenoble et Monsieur Jacques Verdier, Maître de conférences à INSA de Lyon. Merci beaucoup pour vos conseils précieux, votre soutien, et surtout toute la confiance que vous avez su m’accorder. J’adresse mes sincères remerciements à Monsieur Nicolas Corrao, Responsable de la plate-forme de caractérisation Hyperfréquences pour m’aider de réaliser les circuits et les mesures. Je tiens à remercier Monsieur Xavier Mescot, Responsable de la plate-forme de caractérisation électrique et physique pour votre aide de mettre à disposition du matériel et les explications techniques. Je tiens également à remercier Monsieur Antoine Pisa, technicien à Phelma, pour votre aide de fabriquer les circuits, toujours dans le meilleur délai. Merci à tous les membres de l’IMEP-LAHC, en particulier mes collègues pour tous vos aides, vos encouragements et le temps qu’on a passé ensemble. Enfin, je tiens à remercier ma famille et mes chers amis qui m’ont encouragé durant toutes ces années. Contents Introduction ............................................................................................................................................................... 13 1. State of the art ................................................................................................................................................ 17 1.1 Solutions of energy harvesting ................................................................................................................ 17 1.1.1 Ambient energy harvesting ............................................................................................................... 17 1.1.2 Promising frequencies for ambient RF energy harvesting ................................................... 18 a. Limitation standard ..................................................................................................................... 19 b. Available power densities ......................................................................................................... 20 1.2 Rectenna structures for ambient RF energy harvesting ............................................................ 21 1.2.1 Techniques to increase RF-to-DC conversion efficiency of rectenna ............................... 22 a. Nonlinear device choices ........................................................................................................... 22 b. Circuit topologies choices ......................................................................................................... 24 c. Harmonic termination techniques ........................................................................................ 25 d. Impedance matching ................................................................................................................... 26 1.2.2 Techniques to increase the harvested power ............................................................................ 28 a. Combining techniques ................................................................................................................ 28 b. Single-frequency: Multiple antennas in RF-combiner configuration ...................... 29 c. Single-frequency: Multiple antennas in DC-combiner configuration ..................... 30 d. Single-frequency: Multi-input of an antenna in DC-combiner configuration ...... 31 e. Multi-frequency: Multiple single-band antennas and single-tone rectifiers ....... 32 f. Multi-frequency: Wideband/Multiband antenna and single-tone rectifiers ....... 33 g. Multi-frequency: Wideband/Multiband antenna and multi-tone rectifier .......... 34 1.3 Flexible antenna in energy harvesting system ............................................................................... 36 1.3.1 Antenna using flexible material ....................................................................................................... 36 a. Textile material ............................................................................................................................. 36 b. Paper-based and polymer-based material ......................................................................... 37 1.3.2 Techniques to increase realized gain of flexible antenna ..................................................... 38 1.3.3 Integration of flexible antenna in energy harvesting system .............................................. 39 1.4 Conclusion ........................................................................................................................................................... 43 2. Antenna ............................................................................................................................................................. 45 2.1 Requirements of antenna for ambient energy harvesting ....................................................... 45 2.2 3D flexible multi-band antenna ............................................................................................................... 46 1 2.2.1 Dipole-based antenna .......................................................................................................................... 47 a. Antenna Configuration ............................................................................................................... 47 b. Simulation and measurement results .................................................................................. 48 c. Applying for printed antenna on flexible substrate ....................................................... 53 2.2.2 Coplanar-based antenna ..................................................................................................................... 55 a. Antenna configuration ................................................................................................................ 55 b. Bending and folding analysis ................................................................................................... 58 c. Fabrication and measurement ................................................................................................ 60 d. Conclusion ....................................................................................................................................... 64 2.3 Technique to overcome high-loss substrate ...................................................................................
Recommended publications
  • A Wideband Conformal Antenna with High Pattern Integrity for Mmwave 5G Smartphones
    Progress In Electromagnetics Research Letters, Vol. 84, 1–6, 2019 A Wideband Conformal Antenna with High Pattern Integrity for mmWave 5G Smartphones Gulur S. Karthikeya*,MaheshP.Abegaonkar,andShibanK.Koul Abstract—In this paper, a co-planar waveguide fed circular slot antenna with an operational impedance bandwidth of 20–28 GHz is proposed. In order to reduce the effective occupied volume when the antenna is integrated onto a typical mmWave 5G smartphone, a conformal topology is investigated. Since the radiating aperture is not backed by an electrically large ground plane, it leads to a bidirectional beam resulting in an inherently low forward gain of 4 dBi with a front to back ratio of 1 dB. Hence, a compact exponentially tapered copper film reflector is integrated electrically close (0.046λ at 28 GHz) to the radiating aperture to achieve a forward gain of 8–9 dBi with an effective radiating volume of 0.24λ3. The impedance bandwidth is from 25 to 30 GHz (18.2%) with a 1-dB gain bandwidth of 34.7% indicating high pattern integrity across the band. Since the proposed antenna element offers wideband with high gain, it is a potential candidate for mmWave 5G smartphones. 1. INTRODUCTION The phenomenal growth in the smartphone users over the years has provoked researchers in academia and industry to design future-proof transceivers facilitating high data-rates, which in turn need high carrier frequencies, such as 28 GHz band. The 28 GHz band is projected as a potential candidate for future 5G cellular communication systems. The fundamental challenge for deployment of 28 GHz radios is the inherent high path loss.
    [Show full text]
  • Directional Or Omnidirectional Antenna?
    TECHNOTE No. 1 Joe Carr's Radio Tech-Notes Directional or Omnidirectional Antenna? Joseph J. Carr Universal Radio Research 6830 Americana Parkway Reynoldsburg, Ohio 43068 1 Directional or Omnidirectional Antenna? Joseph J. Carr Do you need a directional antenna or an omnidirectional antenna? That question is basic for amateur radio operators, shortwave listeners and scanner operators. The answer is simple: It depends. I would like to give you a simple rule for all situations, but that is not possible. With radio antennas, the "global solution" is rarely the correct solution for all users. In this paper you will find a discussion of the issues involved so that you can make an informed decision on the antenna type that meets most of your needs. But first, let's take a look at what we mean by "directional" and "omnidirectional." Antenna Patterns Radio antennas produce a three dimensional radiation pattern, but for purposes of this discussion we will consider only the azimuthal pattern. This pattern is as seen from a "bird's eye" view above the antenna. In the discussions below we will assume four different signals (A, B, C, D) arriving from different directions. In actual situations, of course, the signals will arrive from any direction, but we need to keep our discussion simplified. Omnidirectional Antennas. The omnidirectional antenna radiates or receives equally well in all directions. It is also called the "non-directional" antenna because it does not favor any particular direction. Figure 1 shows the pattern for an omnidirectional antenna, with the four cardinal signals. This type of pattern is commonly associated with verticals, ground planes and other antenna types in which the radiator element is vertical with respect to the Earth's surface.
    [Show full text]
  • A Conceptual Design for Load Triggering by Extracting Power from the Conventional Wireless Signal with Frequency Matched to Ism Band (2.4 Ghz)
    International Journal of Mechanical Engineering and Technology (IJMET) Volume 9, Issue 5, May 2018, pp. 725–732, Article ID: IJMET_09_05_080 Available online at http://iaeme.com/Home/issue/IJMET?Volume=9&Issue=5 ISSN Print: 0976-6340 and ISSN Online: 0976-6359 © IAEME Publication Scopus Indexed A CONCEPTUAL DESIGN FOR LOAD TRIGGERING BY EXTRACTING POWER FROM THE CONVENTIONAL WIRELESS SIGNAL WITH FREQUENCY MATCHED TO ISM BAND (2.4 GHZ) V. Prabhakaran Research Scholar, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India Dr. P. Shankar Principal, Aarupadai Veedu Institute of Technology, Chennai, India Dr. P.C. Kishore Raja Professor and Head, Department of Electronics and Communication Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India ABSTRACT In recent scenario, the usage of Non-renewable sources is tremendously aggregated to meet the ever increasing load demand. Though renewable sources are used as a supplement, still the load demand cannot be matched. In this paper, a new conceptual inverter design is formulated which powers the load through conventional wireless signals (ISM Band – 2.4 GhZ) by a novel “Rectenna design” with an output amplification factor of (~7 times) than input signal. This design is simulated in MATLAB and the output factors are analyzed for ISM (Industrial, Scientific and Medical Radio) band signals. Keywords: Rectenna Design, Boost Converter, ISM band signals, Inverter Cite this Article: V. Prabhakaran, Dr. P. Shankar and Dr. P.C. Kishore Raja, A Conceptual Design for Load Triggering by Extracting Power from the Conventional Wireless Signal with Frequency Matched to ISM Band (2.4 GHZ), International Journal of Mechanical Engineering and Technology, 9(5), 2018, pp.
    [Show full text]
  • Performance Analysis of Helical Antenna for Different Physical Structure
    International Journal of Innovative Research in Electronics and Communications (IJIREC) Volume 5, Issue 4, 2018, PP 21-25 ISSN 2349-4050 (Online) & ISSN 2349-4042 (Print) DOI: http://dx.doi.org/10.20431/2349-4050.0504004 www.arcjournals.org Performance Analysis of Helical Antenna for Different Physical Structure Rahul koshti1, Simran Yadav2, Shikha Sharma3 MPSTME, NMIMS, Shirpur *Corresponding Author: Rahul koshti, MPSTME, NMIMS, Shirpur Abstract: Wireless technology is such of the potent areas of scan in the presence of communication systems today and a design of communication systems is incomplete without a perspective of the activity and fabricatio n of antennas. Helical antenna is used as easily done and shrewd radiators completely the get by few decades, this antenna can be utilized as an encourage for an explanatory dish for higher additions.. So in this we have varied various parameters of helical antenna. Manipulations for this helical antenna antenna have been done with the assist of Matlab softwar Keywords: helical antennas, Antenna gain, Directivity. 1. INTRODUCTION In 1946 Kraus invented the helix form of antenna that is helical antenna. For longer period of time this helical antenna gets famous. [1] Helical antennas are further called as unfiled helix. By the all of diameter D in large helical antenna is revitalizing by a coaxial line along the little ground plane. In communication system helical antenna have a very large approach, so there is a foist of broadband circular polarized antennas [2].This antenna is most significantly used nowadays in point communications, telephone, and television and Information communication. The normal mode helical antenna is particularly attractive for mobile communication and adaptable equipment [3].The shape of helix antenna is a cross breed of two straightforward emanating essentials, the dipole and circle reception apparatuses.
    [Show full text]
  • Conformal Microstrip Printed Antenna
    Conformal microstrip printed antenna K. Elleithy H. Bajwa A. Elrashidi ([email protected]) ([email protected]) ([email protected]) University of Bridgeport 126 Park Avenue Bridgeport, CT 06604 Abstract 4. With planer arrays the radiation pattern changes In this paper, the comprehensive study of the with the direction of scan, while conformal arrays conformal microstrip printed antenna is presented. The main with rotational symmetry (cylindrical profile) can advantages and drawbacks of a microstrip conformal have scan-invariant pattern [5]. antenna are introduced. The earlier researches in cylindrical- 5. Cylindrical conformal gives nearly Omni- rectangular patch and conformal microstrip array are directional radiation pattern [6]. summarized. The effect of curvature on the conformal 6. It gives large angle coverage. Microstrip antenna patch on conical and spherical surfaces is studied. Some new flexible antenna is given for different Because of the advantages of conformal antennas, it is very frequencies. Finally, simulation software is used to study the popular in the different flight aircrafts [7]. effect of the curvature on the input impedance, return loss, On the other side, a conformal microstrip antenna has some voltage standing wave ratio, and resonance frequency. drawbacks due to bedding [8], those drawbacks are illustrated below: Keywords: Microstrip antenna, conformal antenna, Printed 1. The dielectric material will undergo stretching and antenna, resonance frequency, curvature, input impedance, compression along the inner and outer surfaces, return loss, and voltage standing wave ratio. respectively. Stretching of copper traces will result in phase, impedance, and resonance frequency 1. Introduction error. 2. Shaping the material can also result in a change in Microstrip antennas have been widely studied in recent both the dielectric constant and material thickness.
    [Show full text]
  • Broadband Antenna 1
    Broadband Antenna Broadband Antenna Chapter 4 1 Broadband Antenna Learning Outcome • At the end of this chapter student should able to: – To design and evaluate various antenna to meet application requirements for • Loops antenna • Helix antenna • Yagi Uda antenna 2 Broadband Antenna What is broadband antenna? • The advent of broadband system in wireless communication area has demanded the design of antennas that must operate effectively over a wide range of frequencies. • An antenna with wide bandwidth is referred to as a broadband antenna. • But the question is, wide bandwidth mean how much bandwidth? The term "broadband" is a relative measure of bandwidth and varies with the circumstances. 3 Broadband Antenna Bandwidth Bandwidth is computed in two ways: • (1) (4.1) where fu and fl are the upper and lower frequencies of operation for which satisfactory performance is obtained. fc is the center frequency. • (2) (4.2) Note: The bandwidth of narrow band antenna is usually expressed as a percentage using equation (4.1), whereas wideband antenna are quoted as a ratio using equation (4.2). 4 Broadband Antenna Broadband Antenna • The definition of a broadband antenna is somewhat arbitrary and depends on the particular antenna. • If the impendence and pattern of an antenna do not change significantly over about an octave ( fu / fl =2) or more, it will classified as a broadband antenna". • In this chapter we will focus on – Loops antenna – Helix antenna – Yagi uda antenna – Log periodic antenna* 5 Broadband Antenna LOOP ANTENNA 6 Broadband Antenna Loops Antenna • Another simple, inexpensive, and very versatile antenna type is the loop antenna.
    [Show full text]
  • Helical Feed Manipulation for Parabolic Reflector Antenna Gain Control
    International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-4 Issue-2, December 2014 Helical Feed Manipulation for Parabolic Reflector Antenna Gain Control Zohair Mohammed Elhassan Hussein, Abdelrasoul jabar kizar alzubaidi Abstract Helical antennas have long been popular in A sketch of a typical helical antenna is shown in Figure (1). applications from VHF to microwaves requiring circular The radiating element is a helix of wire, driven at one end polarization, since they have the unique property of naturally and radiating along the axis of the helix. A ground plane at providing circularly polarized radiation. One area that takes the driven end makes the radiation unidirectional from the advantage of this property is satellite communications. Where far (open) end. There are also configurations that radiate more gain is required than can be provided by a helical antenna alone, a helical antenna can also be used as a feed for perpendicular to the axis, with an unidirectional pattern. a parabolic dish for higher gains. The helical antenna can be W e shall only consider the axial-mode configuration. an excellent feed for a dish, with the advantage of circular Typical helix dimensions for an axial-mode helical antenna polarization. One limitation is that the usefulness of the have a helix circumference of one wavelength at the center circular polarization is limited since it cannot be easily frequency, with a helix pitch of 12 to 14 degrees. Kraus reversed to the other sense, left- handed to right-handed or defines the pitch angle α as: vice-versa. This paper deals with applying an electronic technique to control the helical feed of the parabolic reflector = ………………..(1) feed.
    [Show full text]
  • Various Types of Antenna with Respect to Their Applications: a Review
    INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY SCIENCES AND ENGINEERING, VOL. 7, NO. 3, MARCH 2016 Various Types of Antenna with Respect to their Applications: A Review Abdul Qadir Khan1, Muhammad Riaz2 and Anas Bilal3 1,2,3School of Information Technology, The University of Lahore, Islamabad Campus [email protected], [email protected], [email protected] Abstract– Antenna is the most important part in wireless point to point communication where increase gain and communication systems. Antenna transforms electrical signals lessened wave impedance are required [45]. into radio waves and vice versa. The antennas are of various As the knowledge about antennas along with its application kinds and having different characteristics according to the need is particularly less thus this review is essential for determining of signal transmission and reception. In this paper, we present various antennas and their applications in different systems. comparative analysis of various types of antennas that can be differentiated with respect to their shapes, material used, signal In this paper a detailed review of various types of antenna bandwidth, transmission range etc. Our main focus is to classify which developed to perform useful task of communication in these antennas according to their applications. As in the modern different field of communication network is presented. era antennas are the basic prerequisites for wireless communications that is required for fast and efficient II. WIRE ANTENNA communications. This paper will help the design architect to choose proper antenna for the desired application. A. Biconical Dipole Antenna Keywords– Antenna, Communications, Applications and Signal There is no restriction to the data transfer capacity of an Transmission infinite constant-impedance transmission line however any pragmatic execution of the biconical dipole has appendages of constrained extend forming an open-circuit stub in the same I.
    [Show full text]
  • Wideband Rectenna System for Microwave Power Transfer
    Wideband Rectenna System for Microwave Power Transfer by Mohammed Aldosari A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Master of Applied Science in Electrical and Computer Engineering Waterloo, Ontario, Canada, 2018 ©Mohammed Aldosari 2018 AUTHOR'S DECLARATION I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. ii Abstract One of the fundamental devices in Microwave Power Transfer (MPT) is the rectenna or rectifying antenna, which collects the electromagnetic energy from the free space and convert it directly to a useful DC power. Although many designs of rectenna systems have been proposed, most of them operate in a narrowband frequency and/or a certain level of incident power, which limits the output DC power and the uses of the rectenna. In this work, three novel designs of the rectenna that operate in broadband frequency and wide range of received power are developed. The design methodology for such critical characteristics for the rectenna has been discussed in details. Furthermore, the presented wideband rectennas have the best results comparing to the literature in terms of frequency bandwidth and power range, which indicates great achievement in terms of increasing the output DC power significantly as a result of decreasing the effect of the variation of the frequency and incident power and the ability of harvesting multiple frequencies simultaneously. Furthermore, the wideband rectenna can be considered as an approach to minimize the number of the used rectennas by having a single rectenna that operates in a wide frequency bandwidth and wide range of incident power.
    [Show full text]
  • Experimental Demonstration of Conformal Phased Array Antenna
    www.nature.com/scientificreports OPEN Experimental demonstration of conformal phased array antenna via transformation optics Received: 2 November 2017 Juan Lei1,2, Juxing Yang1, Xi Chen1, Zhiya Zhang1, Guang Fu1 & Yang Hao2 Accepted: 9 February 2018 Transformation Optics has been proven a versatile technique for designing novel electromagnetic Published: xx xx xxxx devices and it has much wider applicability in many subject areas related to general wave equations. Among them, quasi-conformal transformation optics (QCTO) can be applied to minimize anisotropy of transformed media and has opened up the possibility to the design of broadband antennas with arbitrary geometries. In this work, a wide-angle scanning conformal phased array based on all-dielectric QCTO lens is designed and experimentally demonstrated. Excited by the same current distribution as such in a conventional planar array, the conformal system in presence of QCTO lens can preserve the same radiation characteristics of a planar array with wide-angle beam-scanning and low side lobe level (SLL). Laplace’s equation subject to Dirichlet-Neumann boundary conditions is adopted to construct the mapping between the virtual and physical spaces. The isotropic lens with graded refractive index is realized by all-dielectric holey structure after an efective parameter approximation. The measurements of the fabricated system agree well with the simulated results, which demonstrate its excellent wide- angle beam scanning performance. Such demonstration paves the way to a robust but efcient array synthesis, as well as multi-beam and beam forming realization of conformal arrays via transformation optics. Phased array antennas have received increasing attention in recent years for applications in modern wireless com- munications and radar systems etc.
    [Show full text]
  • Reflector Spacings of Helical Beam Antennas by Donald O Marriage A
    Reflector spacings of helical beam antennas by Donald O Marriage A THESIS Submitted to the Graduate Committee in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering Montana State University © Copyright by Donald O Marriage (1954) Abstract: Antennas possessing circular polarization characteristics have become increasingly important in recent years. Such an antenna finds an important use in aircraft to airfield and missile to control station communications as a means of stabilising random polarization changes of the received signal. The dimensional ,requirements for a helix to radiate in the axial or beam mode are discussed and a test helix is designed using an average of each dimension A radiation pattern is calculated for the test antenna, and radiation patterns are plotted for various reflector to first turn spacings, The reflector spacing for maximum gain is indicated# and pattern beam width is discussed. A method of obtaining, linear polarisation with a possible gain increase is suggested. :: REELECTOR SPACIMGS OE HELICAL BEAM ANTENNAS by DONALD O.. MARRIAGE 't A BESIS Submitted to the Graduate Committee’ ,, ■ , • ■ .... : , in - V " ‘ , ■ : : partial fulfillment of the requirement's ■' .:n: ■ ' ■ ■ ' ■' for the degree of %' Master of Scienbe in Electrieal Engineering i, -'V ,- at - > ■ Montana State College . • Approved? -V . ■ ) ■ ■ /:. ".V Siaizraan6 ExAmihg Copaittee iSanfl Graduate ^!vision ■ Bosemans Montana Junes 1954 ' '! lVuV- I,.'; 1 ' I I. ,• p!\ 3 A cIr -2 C - ■ 2— I TABLE OF CONTENTS ACKNOWLEDGMENT......................................... 3 ABSTRACT.............................................. 4 INTRODUCTION........................................... 5 THE HELICAL ANTENNA IN GENERAL.......................... 7 THE AXIAL MODE OF RADIATION.............................. 11 CONSTRUCTION OF THE TEST ANTENNA..........................15 SUMMARY OF RESULTS...................................... 22 CONCLUSIONS............................................
    [Show full text]
  • Taoglas Catalog
    Product Catalog 2 Taoglas Products & Services Catalog Wireless communications are positively Our new line of LPWA antennas plays a major role changing the world, and we’re here to in realizing the value of low connectivity cost and help. Our product lineup brings the latest reduced power consumption. innovations in IoT and Transportation antenna solutions. Our Sure GNSS high precision series includes the AQHA.50 and AQHA.11 antennas to support At Taoglas we work hard to develop the next the growing demand for high precision GNSS wave of cutting-edge antenna solutions to add solutions. Our product offering comprises of both to our already market-leading product offering. embedded and external antennas for timing, Inside this catalog, you will find our ever-growing location and RTK applications. product range presented by frequency bands, giving you what you need at your fingertips to Our Antenna Builder and Cable Builder, available build your solution with complete confidence. online makes it easy for our customers to build and customize antenna and cabling solution with Taoglas continues to make significant the promise of product delivery within as little as investments in our production and infrastructure. two days. Our IATF-16949 certification approval is the global standard for quality assurance for the Our range of services continues to support automotive industry. some of the world’s leading IoT brands, helping them to optimize their products to ensure Staying on the cutting-edge of innovation, reliable performance on a global scale with we have developed new Beam Steering IoT endless design solutions including LDS. Utilizing antenna solutions.
    [Show full text]