Dissertations / Theses on the topic 'Monopole'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Monopole.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Moriyama, Sanefumi. "Noncommutative Monopole from Nonlinear Monopole." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149975.
Full textTemple-Raston, Mark Renwick. "Monopole motions." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276584.
Full textSomogyi, Robert. "Essays on capacity-constrained pricing." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX024/document.
Full textThis Ph.D. thesis is composed of three chapters. Since Kreps and Scheinkman's seminal article (1983) a large number of papers have analyzed capacity constraints' potential to relax price competition. However, the majority of the ensuing literature has assumed that products are either perfect or very close substitutes. Therefore very little is known about the interaction between capacity constraints and local monopoly power. The aim of the present paper is to shed light on this question using a standard Hotelling setup. The high level of product dierentiation results in a variety of equilibrium firm behavior and it generates at least one pure-strategy equilibrium for any capacity level. The second chapter, "Bertrand-Edgeworth Competition with Substantial Product Differentiation", studies the price-setting behavior of a monopoly facing two capacity constraints: one on the number of consumers it can serve, the other on the total amount of products it can sell. Facing two consumer groups that difer in their demands and the distribution of their willingness-to-pay, the monopoly's optimal non-linear pricing strategy consists of offering one or two price-quantity bundles. The characterization of the firm's optimal pricing as a function of its two capacities reveals a rich structure that also gives rise to some surprising results. In particular, I show that prices are non-monotonic in capacity levels. Moreover, there always exists a range of parameters in which weakening one of the capacity constraints decreases consumer surplus. In the long run, when the firms can choose how much capacity to build, prices and consumer surplus are monotonic in capacity costs. The third chapter, "Competition with Dual Capacity Constraints", studies duopoly pricing under dual capacity constraints, limiting both the total quantity and the number of consumers served. It extends both the analysis of monopoly pricing with dual capacity constraints and the symmetric models of Bertrand-Edgeworth competition with a singular capacity. By isolating parameter regions where a symmetric pure-strategy equilibrium exists, I nd that several types of equilibria are possible, depending on the model's specications. For some of them, duopoly prices are identical to monopoly prices. Equilibrium prices are non-monotonic in capacity levels if consumers' valuations are suciently heterogeneous. Moreover, I show that despite their ability to price discriminate, competition may lead firms to charge identical prices across markets
Sakarya, Emre. "Kaluza-klein Monopole." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608673/index.pdf.
Full textde, Vries Erik Jan. "Supersymmetric monopole dynamics." Thesis, Heriot-Watt University, 2009. http://hdl.handle.net/10399/2230.
Full textPhilippe, Alice. "Le monopole de fait." Thesis, Toulouse 1, 2018. http://www.theses.fr/2018TOU10064.
Full textThe "monopole de fait" is promoted in the French Constitution’s 9th preambular paragraph of October 27, 1946, according to which: "any good, any enterprise, whose exploitation has or acquires the characteristics of a national public service or a "monopole de fait", must become the property of the collectivity". In apparent clarity, the wording is nonetheless enigmatic for the jurist. While this policy seemed to justify nationalization (which explains the punctual nature of the studies that are made to it), the condemnation of the "monopole de fait" is a timeless logic: that of the participation of the market to the realization of the public interest. This is what the origins of the "monopole de fait", both economic and political, leads to. This euphemism, is useful to precisely designate economic feudalism and market failure. The "monopole de fait" is a threat, and when it is rife it prevents the realization of what the French scholars called an economic and social democracy. Should we mention those companies which, having a large market power, opt for aggressive corporate strategies; GAFA, banks and insurance companies, the incumbent operators in the network sectors, the agribusiness giants, are all flagrant examples of "monopole de fait". It is therefore straightforward that we must condemn it by collective appropriation. Notion that moves to the confines of law and economics, the "monopole de fait" is the cornerstone of what could be called market law. This branch of law would mitigate, mutatis mutandis, market failures. Nothing morenecessary, then, than to characterize the "monopole de fait". In this field, the different situations all have the same characteristic and all tend to achieve the same result: it is an abusive exploitation resulting in a rent situation. It is these two aspects combined that make possible the identification of "monopole de fait", in law. Strong of this first step, the sanction through collective appropriation must be redefined. The purely proprietary approach that prevailed allowed, in part, collective appropriation (because public property is, more than the others, held by the public interest). But it is neglected in this study in favor of a more pragmatic analysis focusing on the various parties involved and the legitimate interests harmed by "monopole de fait". To echo the 1946’s 9th preambular paragraph, it could be said that the de facto monopoly regime must enable stakeholders to assert their right (s) against companies
Borg, André. "Le monopole officinal : étude sur l’influence du monopole officinal sur l’exercice professionnel du pharmacien." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0333.
Full textThe French pharmacist monopoly is a privilege with important counterparts and obligations that only a pharmacist can assume. Qualified as a pharmaceutical exception, it is intended to meet the protection of public health. Currently, the pharmacy sector is going through a deep crisis and is at a major turning point in its development. The current model seems unsuitable and obsolete to face the issues and challenges of the profession. Is it still likely to endure as it exists? Increasingly small despite ever-increasing demands, it is fragmented to such an extent that the structuring of the drug's retail distribution network has turned into an unidentified object. Hesitation between commercial activity and liberal activity, questioning of the principle of indivisibility, the pharmacist evolves within a normative framework which is no longer buoyant, not to say recessive. Subject to excesses and controversies, the French system is called into question both from a National and Community point of view. What if this questioning would not constitute an opportunity for the pharmacist rather than an inevitability?
Lourens, Jako. "A wideband monopole antenna design." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80026.
Full textENGLISH ABSTRACT: The successful operation of a man-pack VHF jamming system requires a compact and efficient antenna operating over a wide bandwidth. The design of such an antenna is the focus of this thesis. The antenna should be of a practical size for a portable system and it must radiate energy efficiently across a frequency bandwidth in excess of a decade. A practical „target‟ specification of such an antenna has been drawn up based on the performance of a commercially available system. Several possible antenna topologies, each with a variety of loading section options, are tested using “Full wave” electromagnetic modelling (FEKO). Each topology/loading-section is numerically optimised for load element values by considering both its gain and reflection coefficient. Results of the „optimally loaded‟ solution for each topology are then compared to each other to arrive at the best overall design. The best result is found to be the traditional monopole whip-type antenna, with four R-L loading sections spread along its length. The simulated results show that the proposed antenna can be expected to meet the target standing wave ratio (SWR) specifications while offering a gain advantage of between 5 and 10 dBi higher than is available commercially. The selected design is constructed and its performance measured.
AFRIKAANSE OPSOMMING: Die suksesvolle werking van ʼn mobiele VHF "jammer‟ benodig ʼn kompakte antenna met ʼn bruikbare benuttingsgraad wat oor ʼn wyeband funksioneer. Die ontwerp van so ʼn antenna is die fokus van hierdie tesis. Die antenna moet kompak genoeg wees om draagbaar te wees en moet ʼn bruikbare benuttingsgraad hê oor ʼn frekwensie-bandwydte van meer as 10:1. ʼn Praktiese spesifikasie is opgestel vir die antenna deur te kyk na die sigblaaie van beskikbare stelsels. “Volgolf” elektromagnetiese modelleringsagteware is daarna gebruik om ʼn parametriese ondersoek te loods van verskillende antennas. Verskillende topologieë is getoets met ʼn verskeidenheid van belaaide seksies waar die topologieë ge-optimaliseer was vir wins en weerkaatskoëffisiënt. Die resultate vir elke optimale oplossing is vergelyk.Opgrond van hierdie resultate is bevind dat die beste topologie die tradisionele monopoolmas "whip-type‟ antenna is met vier RL lading afdelings langs die lengte versprei. Analise word gebruik om te wys dat verwag kan word dat dit aan die aanwins en staande golf verhouding (SGV) spesifikasies sal voldoen met n 10 dB verhoging in aanwins vir n laer SGV. Die geselekteerde ontwerp is gebou en gemeet om te verifieer dat dit aan die spesifikasies voldoen.
DAS, GUPTA SHINJINEE. "Electric Monopole Transition in 160Er." Doctoral thesis, Università degli Studi di Camerino, 2011. http://hdl.handle.net/11581/401864.
Full textKronenberger, Vincent. "Le monopole des alcools en Finlande : exemple de la mutation des monopoles publics en droit communautaire." Toulouse 1, 1999. http://www.theses.fr/1999TOU10001.
Full textThe Finnish alcohol monopoly has gone through an unprecedented transformation following Finland’s accession to the European community in 1995. Pursuing a public health mission, the state monopoly had obtained extensive exclusive rights and privileges. Today, there remains only the retail sale monopoly which is entirely independent from other parts of the formerly integrated monopoly. This research on the particularly interesting example of the Finnish monopoly, draws up a typology and sets a model for transformation of state monopolies in EC law, which is applicable to all monopolistic sectors currently under liberalisation (postal services, railways, electricity. . . ). This study retains both a functional and institutional definition of state monopolies and therefore of their transformation. First, a functional transformation consisting in both liberalisation and separation of economical and regulatory functions of the monopoly. The shape of the monopoly is reduced but its existence is not necessarily condemned, as recent case-law indicates. Second, an institutional transformation: unbundling and + distanciation; from the state. The monopoly is even more isolated. In the end, besides the EC treaty's legal basis, the Finnish monopoly example reveals a genuine judicial policy of community institutions towards monopolies. The former daringly liberal interpretation of the treaty has been replaced today by a more neutral approach which tolerates monopolies, provided their + confinement. However this phase is expected not to be the final step of EC law
Schlub, Robert Walter, and n/a. "Practical Realization of Switched and Adaptive Parasitic Monopole Radiating Structures." Griffith University. School of Microelectronic Engineering, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040610.112148.
Full textSchlub, Robert Walter. "Practical Realization of Switched and Adaptive Parasitic Monopole Radiating Structures." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366803.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Microelectronic Engineering
Full Text
Dougall, Triston. "Monopole pair production via photon fusion." Ann Arbor, Mich. : ProQuest, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1440255.
Full textTitle from PDF title page (viewed Mar. 18, 2008). Source: Masters Abstracts International, Volume: 45-02, page: 0889. Adviser: Jingbo Ye. Includes bibliographical references.
Heinemann, Andreas. "Grenzen staatlicher Monopole im EG-Vertrag /." München : Beck, 1996. http://www.gbv.de/dms/spk/sbb/recht/toc/27220174X.pdf.
Full textNash, Oliver. "Differential geometry of monopole moduli spaces." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437029.
Full textVuillemin, Karine. "Du monopole des sociétés de Bourse." Paris 2, 1993. http://www.theses.fr/1993PA020133.
Full textThe french markets were made up for over two and a half centuries of the physical grouping of stock brokers who had a monopoly for market transactions and whose numbers where limited by the authorities. The market reform resulting from the january twenty twoth, nineteen hundred eighty height law has caused in-depth change in the system. It has resulted in the stock brokers, i. E. Law officials, being replaced bybrokerage firms. The monopoly for transactions was sustained in favor of the latter, and the numerus clausus seems to have been abolishe nevertheless, the monopoly hazs tended to disapeear ever since, whereas a new form of member firms selection has tended to be reintroduced through the "seat" concept. The european community seems to be confirmed this trend
Marchiani, Charles-Stéphane. "Le monopole de l'Etat sur l'expropriation." Paris 2, 2007. http://www.theses.fr/2007PA020008.
Full textBadra, Yassine. "Equilibres de Nash en Prix avec Stocks d’Invendus, Monopole et Bien-être." Thesis, Paris 2, 2018. http://www.theses.fr/2018PA020066.
Full textAfter a general introduction and a survey of literature, the contribution of this thesis is to determine the role of the demand in the emergence of unsold stock of goods based on consumer’s preferences argument. Throughout the thesis, we consider a strategic game with two players under perfect information, certainty and price flexibility. Consumers are of two types: with appreciation to the display and without. A modified monopoly chooses both the price and the display. Chapter 2 presents an original model to determine the optimal markup for both elastic and inelastic goods (unlike the Lerner index that is used only for elastic goods). Chapter 3 is an extension of the previous one. It is about the determination of an optimal markup with the presence of unsold stock of goods. The fourth and final Chapter analyzes under which conditions an unsold stock of goods is supported by a pure strategy Nash equilibrium. All the models developed present a welfare analysis
Tränkle, Stefan. "Halten kantonale Monopole einer strengen Verhältnismässigkeitsprüfung stand?" St. Gallen, 2008. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/04605655004/$FILE/04605655004.pdf.
Full textSun, Xiaolei, and 孙肖磊. "Dual-band and frequency-reconfigurable monopole antennas." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899880.
Full textpublished_or_final_version
Electrical and Electronic Engineering
Doctoral
Doctor of Philosophy
Davies, N. Michael. "Semiclassical monopole calculations in supersymmetric gauge theories." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4360/.
Full textSchreiber, Adam Wesley. "Efficient analysis of loaded cylindrical monopole antennas." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1256570757/.
Full textKemp, Graham. "Algebra and geometry of Dirac's magnetic monopole." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12508.
Full textÅberg, Lindell Matilda. "Magnetic Monopole Searches : with AMANDA and other detectors." Thesis, Uppsala University, Nuclear and Particle Physics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125649.
Full textMagnetic monopoles are hypothetical particles carrying isolated magnetic charges, analogous to electrically charged particles. They have never been observed in experiments, but there are theoretical indications that they might exist. Several experiments have been carried out over the years in order to detect monopoles, or to set upper limits on their abundance in the Universe.
In this work, underlying theory of the properties of magnetic monopoles is presented, together with some of the experiments performed in the past, the present and the future. Emphasis is put on AMANDA and other Cherenkov neutrino telescopes. Results of the described experimental searches are summarized.
Rol, Jan. "Characterization of monopole induced air showers using CORSIKA." Thesis, Uppsala universitet, Högenergifysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328049.
Full textShen, Zhongxiang. "Modal expansion analysis of monopole and microstrip antennas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/NQ30645.pdf.
Full textEriksson, Oscar, and Kaj Dahl. "Magnetic Monopole Current in Artificial Square Spin Ice." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-154229.
Full textNya teoretiska och experimentella resultat har uppvisat förekomsten av magnetiska monopoler, i form av kvasi-partiklar, både i kondenserade material kallade spinn-is, och i tvådimensionella artificiella versioner av samma material. I den här rapporten undersöks först en tvådimensionell Isingmodell, därefter en artificiell kvadratisk spinn-is-modell med hjälpav en dipolapproximation, där hänsyn endast tas till närmaste och näst närmaste grannar. Metropolis-algoritmen används för beräkna energi, specifika värmekapaciteten och entropinsom funktioner av temperatur. I den senare modellen simuleras även monopolskoncentrationen och monopolsströmmen. De två modellerna uppvisar snarlikt kvantitativt beteende med avseende på ovan nämnda fysikaliska storheter, jämfört med varandra och tidigare publicerade resultat. Under inverkan av ett magnetfält observeras en snabbt avtagande monopolsström, i den artificiella kvadratiska spinn-is-modellen, som avtar snabbare med högre temperaturer. Storleken på det pålagda magnetfältet har markant betydelse för alstrande av monopolsströmmen, och ingen direkt effekt av fasövergången observeras.
Langer, Thomas [Verfasser]. "Monopole als Handlungsinstrumente der öffentlichen Hand. / Thomas Langer." Berlin : Duncker & Humblot, 2019. http://d-nb.info/1238278019/34.
Full textBlais, Angeline. "Monopole antennas for microwave catheter ablation of the myocardium." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq20903.pdf.
Full textEvitts, Lee J. "Electric monopole transition strengths in the stable nickel isotopes." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/841703/.
Full textBessis, Jean-Louis. "Le Droit pénal des ondes du monopole au pluralisme." Paris 1, 1990. http://www.theses.fr/1990PA010306.
Full textOmerani, Driss. "Le monopole d'une ressource non-renouvelable en situation d'incertitude." Toulouse 1, 1991. http://www.theses.fr/1991TOU10011.
Full textThe behaviour of a monopoly, carrying out the extraction of a stock of an exhaustible resource, is examined under different situations bearing uncertainties. From this exam we firstly underline the impact of the uncertainty on the way the monopoly manages its stock and practices the discrimination through prices when the resource has two distinct uses. Then, the part played by the remaining stock as a variable influencing the decision of other firms to supply a substitute. And finally, the part of learning in the strategies of the monopoly
Mouhssine, Najat. "L'exercice illégal de la pharmacie et le monopole pharmaceutique." Bordeaux 1, 1988. http://www.theses.fr/1988BOR1D008.
Full textLEGALLY, "NO ONE IS ALLOWED TO PRATISE PHARMACY IF HE DOES NOT FULFIL THE RIQUIRED CONDITIONS FOR THIS PURPOSE" ARTICLE L. 514 OF THE "PUBLIC HEALTH" CODE. WHOEVER INFRINGES THIS CLAUSE COMMITS THE INDICTABLE OFFENCE OF ILLEGAL PRACTISE OF PHARMACY, AN OFFENCE ANTICIPTED AND PENALIZED BY THE L. 517 ARTICLE OF THE "PUBLIC HEALTH" CODE. NOW, WE HAVE BEEN NOTICING SINCE A CERTAIN TIME A CONSIDERABLE DEVELOPMENT OF THE ACTIVITY OF CERTAIN IMPORTANT DISTRIBUTORS WHO, IN ORDER TO "SMACK" WHAT THEY REGARD AS UNLAWFUL RESTRICTIONS TO COMPETITION, "TACKLE" NOT ONLY THE PARA-PHARMACY MARKET - OF WHICH THE EXCLUSIVE RIGHTS CONSTITUTED, ACCOR- DING TO THEM, A COMPETITIVE PRACTISE INTOLERABLE AND ILLICIT - BUT ALSO AND PARTICULARY THE MARKET OF MEDECINE BY COMMERCIALIZING PRODUCTS without ANY NOTICE ON THEIR PACKING, AS THOUGH NOT ALLEGING THERAPEUTIC PROPERTIES TO THE PRODUCT WAS SUFFICIENT TO RENDER IT A NON-MEDICINAL PRODUCT, THEREFORE A HARMLESS PRODUCT FOR CURRENT CONSUMPTION. THESE NEW FORMS OF DISTRIBUTION HAVE RESTARTED THE DEBATE ON WHAT BE- LONGS TO THE PHARMACY BY RIGHT AND WHAT SHOULD BE SOLD FREELY without ANY HARM FOR THE PUBLIC HEALTH. AT THE INTERSECTING POINT OF THESE QUERIES, IS TO BE
Hurley, Robert C. "Computation of monopole antenna currents using cylindrical harmonic expansions." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/22966.
Full textThis thesis investigates the viability of a new method for numerically computing the input impedance and the currents on simple antenna structures. This technique considers the antenna between two ground planes and uses multiregion cylindrical harmonic expansions with tangential field continuity to obtain the surface currents and input impedance. The computed results are compared to the results obtained from the Numerical Electromagnetics Code for various physical parameters to assess computational accuracy.
http://archive.org/details/computationofmon00hurl
Lieutenant, United States Navy
Falter, Manuela. "Russlands natürliche Monopole Deregulierung am Beispiel der russischen Stromwirtschaft." Berlin BWV, Berliner Wiss.-Verl, 2007. http://d-nb.info/991503376/04.
Full textMouhssine, Najat. "L'Exercice illégal de la pharmacie et le monopole pharmaceutique." Lille 3 : ANRT, 1989. http://catalogue.bnf.fr/ark:/12148/cb37616747m.
Full textWong, Shui Nam. "On the geometry of the space of monopole-clusters." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/10183/.
Full text蔡文益. "Broadband Fractal Circular-Monopole Antenna." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/ejrb2e.
Full text景文科技大學
電腦與通訊研究所
99
In this paper, a novel broadband Fractal circular-monopole antenna is presented. This antenna consists of printed circular iteration with two iterating level and ground-plane with radius 25mm, making it easy to making it easy to combine directional, high gain and wide bandwidth. A prototype is designed to operate at 1.5GHz-5.86GHz, the measured 10 dB bandwidth is nearly 1:2 at the center frequency of 3.775GHz. Experimental results are shown to verify the validity of theoretical work. Fractal monopole antenna is formed with hollow of circle, which featuring of minification, multi-frequency bands and wide bands. The planar fractal monopole antenna is based on the Sierpinski carpet concept and to modified, the Sierpinski fractal has generated two iterations, use the decomposition algorithm by circular, and compare these with integrators and initiator type. Firstly, base on generally circular disc to generate hollow of circular, this initiator has a circumference of and 1mm trace width. In the decomposition algorithm, a geometric ratio of circle is taken and joining the midpoints of union of the circles central, reduce the circle to 1/3 diameter and canonical Sierpinski carpet algorithm to fill the circle with twice mathematics equals 1/9 diameter by 2nd iteration.The geometrical structure and dimensions of the proposed monopole type antenna is printed on FR4 substrate and is simulated by using FEM based electromagnetic simulator, Ansoft HFSS. All of them describe a multiband behavior of fractal antenna. This behavior is consistent from the input return loss and gain; moreover radiation patterns planes of view. The same scale factor existing among similar structures in the fractal circular-shape. It can be summarized that the self-similarity properties of the fractal structure are translated into its electromagnetic behavior. The current density distributions have a similar and vary in complicated among bands as well. Such distributions allows flexibility in matching multi- and width band operations in which a larger frequency required, such as FemtoCell and UMTS base station application including LTE, UMTS, GPS L1, WIFI, and WiMax. The circular monopole type is based on fractal structure and refers to the Sierpinski gasket self-similarity algorithm, a prototype of the design is successfully implemented with close agreement between measurement and simulation. The fractal geometry and overall size can be effectively utilized ID or Logo surface for integrating with other components in IT products.
Huang, Hao-Shiang, and 黃晧翔. "Circularly Polarized Monopole Antenna Designs." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/07486773061579913898.
Full text國立高雄海洋科技大學
電訊工程研究所
102
In this dissertation, circularly polarized (CP) monopole antenna designs for industrial, scientific and medical (ISM) band are proposed. First, by properly introducing dual strip-sleeves shorting at the ground plane, the antenna design provides the impedance bandwidths (RL≧10 dB) of 270 / 988 MHz and the 3 dB axial-ratio (AR) bandwidth of about 85/710 MHz for 2.4/5.2 GHz wireless local area network (WLAN) applications, respectively. The proposed planar antenna reduces the antenna size by at least 22% since the overall antenna size is only 40 × 40 × 1.6 mm3. Meanwhile, the measured peak gains and antenna efficiencies are about 4.2/3.2 dBic and 95/90% across the operating bands, respectively. Next, two spiral monopole antennas with radial and axial circular polarization, respectively, are proposed with the impedance bandwidth of 135/218 MHz and the 3 dB axial-ratio (AR) bandwidth of about 108/125 MHz across 2.45 GHz operating band. Furthermore, the measured peak gains and antenna efficiencies are about 9/10 dBic and 85/80%, respectively. Finally, the analysis of the body specific absorption rate (SAR) for two proposed spiral monopole antennas are discussed and less than 1.6W/kg for 1-g body tissue.
CHEN, GUAN-LIN, and 陳冠霖. "Circularly Polarized Monopole Antenna Designs." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/80716486991789568103.
Full text逢甲大學
電機工程學系
105
This paper studied the circularly polarized RFID reader antenna. The first antenna is a compact circularly polarized monopole antenna. It is fed by a microstrip line. By adjusting the parameters of the left branch and right branch, a circularly polarization with good impedance matching can be obtained. The overall dimension of the first proposed antenna is 60×60×0.8 mm3. The measured 10-dB return loss bandwidth of the antenna is 93.4 MHz (901 – 993.4 MHz, 9.3%), 3-dB axial ratio bandwidth is 12 MHz (916 – 928 MHz, 1.3%), the maximum gain and radiation efficiency are -1.1 dBic and 70%, and antenna has bidirectional radiation characteristics. The half-power beamwidths antenna in XZ plane and YZ plane are 170 degrees and 115 degrees respectively. The first proposed antenna is a low profile, compact size, low cost antenna, which is suitable for portable UHF RFID reader application. The second proposed antenna uses AMC reflector to enhance the gain of the antenna. The AMC reflector periodic structure is placed 9 mm away from the bottom of the antenna for the optimal configuration. The measured 10-dB return loss bandwidth is 650 MHz (2.08 – 2.73 GHz, 27%), 3-dB axial ratio bandwidth is about 120 MHz (2.6 – 2.72 GHz, 4.5 %); the best axis ratio is 1.29 (2.65 GHz), and the measured gain is 6.5 dBic. The front-to-ratios in XZ plane and YZ plane are both about 22 dB. The overall dimension of the second antenna is 80×80×12.2 mm3.
Lane, Charles E. "GUT Monopole Detection with Scintillator." Thesis, 1988. https://thesis.library.caltech.edu/7495/9/lane-ce-1988.pdf.
Full textSearches for the monopoles predicted by Grand Unified Theories (GUTs) have required new approaches, since these monopoles should be both slow and highly penetrating. The ability of scintillator to respond to particles of velocity < 10⁻³ c has been demonstrated, indicating that scintillator detectors should be useful in GUT monopole searches.
A small monopole detector prototype at the Earth's surface was operated in an effort to understand the problems and possibilities of monopole detection. The design philosophy, techniques, and the lessons learned from the prototype detector could then be applied to much larger monopole detectors. The prototype was not able to set new limits for the GUT monopole flux in cosmic rays, but in a more general analysis it was found that new limits could be set on the flux of lightly ionizing particles of mass ~ 10¹⁰ GeV.
When GUT monopole detectors are scaled up to the size needed to challenge astrophysical limits, it becomes more likely that a flux could be found. This motivates a more careful examination of the scintillator counters, since their signal should be clear and unambiguous for a monopole candidate. The performance of the liquid scintillator counters for the MACRO (Monopole And Cosmic Ray Observatory) experiment was given considerable scrutiny, both to try to understand the observed behavior of these counters, and also to improve them for monopole detection.
The results of these tests indicate that MACRO should be able either to establish a monopole flux or to limit it to a small fraction of the 'missing mass' of the universe.
Lin, Yen-Chih, and 林彥鋕. "CPW-Fed Circularly Polarized Monopole Antenna." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/36587086447920777634.
Full text逢甲大學
產業研發碩士班
95
In this thesis, a CPW-fed circularly polarized monopole antenna has been implemented and investigated. The simulated and measured results of the antennas are detailed and analyzed. First, a new antenna possessing linear polarization and circular polarization for applications of the global positioning system (GPS) and digital communication system (DCS) has been designed. The proposed antenna consists of two parts: a quasi-C-shaped monopole antenna and an inverted L-shaped strip connecting to ground plane. By introducing a gap between the monopole antenna and inverted L-shaped strip, a traveling-wave current is excited on a loop trace. Meanwhile, by utilizing the electromagnetic coupling effect inside the gap, the vertical and horizontal electric fields with the phase difference of 90 degree and the equal magnitude result in the circularly polarized radiation in the free space at the 1.5 GHz band (GPS). The resonant band at 1.8 GHz (DCS band) is determined by the effective length of the quasi-C-shaped monopole antenna. Finally, the optimal dimensional values of the antenna are derived by tuning the critical parameters in order to obtain the maximum bandwidth and desired circular polarization。 The advantages of the new proposed antenna are miniaturization, dual-system operation, circular polarization and easy fabrication. The proposed antenna can be a candidate of the RX/TX radiator for the integration of GPS and DCS systems.
WANG, JIAN-CHENG, and 王健丞. "CPW Monopole Antenna Application Circular Polorization." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/26wa3a.
Full text大葉大學
電機工程學系
104
This paper presents to the CPW fed monopole antenna can be use in global positioning system(GPS)and 4G(LTE).This antenna thourgh suitable cutting one side of a metal ground plane, so that the original monopole resonance disappears, forming a dipole resonance, and output and has two orthogonal linearly polarization 90° to achieve circular polarization. On the other side of the metal ground plane, with inverted L-shaped metal patch antenna bandwidth is increased so that the coating on the 4G(LTE)band.In addition, the antenna design can be simple,low -cost production, and easy to combine with the microwave components.
Chang, Teng-Yuan, and 張燈元. "Dual Broadband Bow-Tie Monopole Antenna." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/26574087388647171013.
Full text國立澎湖科技大學
電資研究所
102
This paper presents the designs of three dual broadband bow-tie monopole antennas. The frequencies are designed to meet the applications of the four bands GSM/WLAN/WiMAX/LTE. That is, the low-frequency and high-frequency bands cover 1.71~2.69 GHz (44.55%) and 5.18~5.825 GHz (11.72 %) individually, with input reflection coefficient -10dB level. The first antenna is formed by a bow-tie monopole antenna and a rectangular ring antenna, which is named ringed dual broadband bow-tie antenna. The second antenna is named half-wavelength slot dual broadband bow-tie antenna, which is a broadband bow-tie antenna embedded a half-wavelength slot to generate dual broadband. The third antenna is named quarter wavelength slot dual broadband bow-tie antenna, which is embedded with two open-end quarter-wavelength slots. Using the above mentioned three different methods to design dual broadband monopole antenna, simulated frequency bands are all up to 30% bandwidth. Ring dual broadband bow-tie antenna is implemented and measured. The low-frequency band is 2.19~3.06 GHz (33.14%) and the high-frequency band is 5.3~6.45 GHz (19.57%). The measured results of this half-wavelength slot dual broadband bow-tie antenna are the low-frequency band 1.95~2.65 GHz (30.43%) and the high-frequency band 4.79~6.8 GHz (34.69%). The last 1/4 wavelength slot dual broadband bow-tie antenna with the largest bandwidth can cover GSM/WLAN/WiMAX/LTE band, which the experimental measurements are included the low-frequency band 1.66~2.73 GHz (48.75%) and the high frequency band 4.89~7.00 GHz (35.49%). In addition, as measured results, the S11 and radiation pattern of the designed antenna are roughly consistent with the numerical simulation to verify the feasibility of the antenna design methods mentioned in this paper.
LEE, Kuo-ching, and 李國清. "Planar Triple-band Monopole Antenna Design." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/83782110877053611411.
Full text國立臺灣科技大學
電子工程系
96
The aim of this thesis is to design the triple-bands mono-pole antenna, which was made by common material named FR4 board purchased from the market. Literature survey studied from dual-bands and triple-bands’ papers and these as the fundamental structure; the implementation performed by electromagnetic analysis program named IE3D to do fine tuning antenna and come out simulation results. The optimized parameters had been resolved for making actual antenna product. The proposed planar mono-pole antenna has excellent function upon WiMAX and WLAN frequency bands (2500-2690/3400-3690/ 5250-5850 MHz for WiMAX) and (2.4-2.484 GHz and 5.15-5.35 GHz、5.725-5.825 GHz for WLAN); This antenna also could support frequency bands for PCS(1.85 ~ 1.99 GHz) and UMTS (1.92 ~ 2.17 GHz) with acceptable performances. It should be a good product applying to industrial enterprise.
Chien, Wu-cheng, and 簡武正. "BROADBAND MONOPOLE ANTENNA FOR DVB-T." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/54365269513755483306.
Full text大同大學
通訊工程研究所
99
In the thesis, a wideband monopole antenna for the European DVB-T (Digital Video Broadcast-Terrestrial) system specification is proposed. This paper uses the theory of traditional monopole antenna and impedance matching with the appropriate adjustment method to meet the DVB-T frequency band specification(470 MHz to 862 MHz), the monopole antenna in order to meet the DVB-T specification, firstly, adjusted the length and width of antenna to meet the low-frequency part of the DVB-T, followed by a patch with inset feeding configuration is used and adjust the feed line to the appropriate width ratio, and effective enough to increase the impedance bandwidth to cover the DVB-T requirements specification band. After actual results of the measurement of the impedance bandwidth and radiation characteristics are consistent with the simulation, the proposed antenna can be applied to DVB-T.
Kao, Ping-Chi, and 高鈵騏. "Designs of CPW-fed Monopole Antennas." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/ufdst6.
Full text國立虎尾科技大學
光電與材料科技研究所
94
In recent years, the fast development of the wireless communication network has already provided much convenience to human being’s livings. The size and radiation characteristic of an antenna embedded in a wireless communication network will thus apparently affect the transceiving efficiency of the communication devices. Therefore, design of an antenna with suitable operating band, sufficient bandwidth, compact size, simple structure, and easy implementation for improving the mobility of a wireless communication device becomes the purpose of this study. The subject of this thesis is design of planar printed antennas for application to wireless communication systems. Two feed techniques of coplanar waveguide(CPW)feed and probe feed are utilized in this research to design three CPW-fed antennas with different impedance characteristics and one probe-fed antenna with circular-polarization characteristic. These proposed antenna designs include(1)a CPW-fed inverted triangular patch antenna for ultra-wideband operation(2)a CPW-fed inverted triangular patch antenna with a frequency band notch function for ultra-wideband operation(3)a compact CPW-fed dual folded-strip monopole antenna for 5.8 GHz RFID application, and(4)a square slotted patch antenna for circular polarization. The theoretical simulation, implementation of antenna prototypes, and measurement of antenna characteristics including impedance bandwidth, radiation patterns, and antenna gain, are all detailedly described and discussed in this thesis.
Luo, Shih-Cing, and 羅仕清. "Study of Broadband Monopole Slot Antenna Feed." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/03680026198637219053.
Full text明新科技大學
電機工程系碩士班
104
In this thesis, we study separately the asymmetric coplanar waveguide fed and the U-shaped coplanar waveguide fed monopole slot antennas. The Implement of antenna is carried out with printing circuit boards, which are easy to be integrated, low cost and enhancing convenience production characteristics. In this study, two different locations of feed are applied for the monopole slot antenna. The resonant modes of the antenna are excited by different current paths. In asymmetric coplanar waveguide feed case, by changing the location and shape of the feed, the asymmetric coplanar waveguide fed monopole slot antenna has operating frequency from 2.55GHz to 6.2GHz with operating bandwidth 85%. The U-shaped coplanar waveguide fed monopole slot antenna has operating frequency between 2.3GHz and 5.4GHz with bandwidth is 82%. The operating bands of these antennas are including Bluetooth ,WLAN and WI-MAX, which can be applied for wireless network. The bandwidth is more than 25% (500MHz above) and fits in the definition of ultra wide band.
LU, BO-RU, and 盧柏儒. "Broadband C-Shaped Circularly Polarized Monopole Antenna." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/87950526255852096732.
Full text大葉大學
電機工程學系
104
This thesis discusses is designed and improve the Broadband C-Shaped monopole. The antenna is reference by C-Shaped, and add a rectangle and open-loop in ground plan to achieve width bandwidth and axial ratio. Advantages of the antenna are simple structure, compact size , width bandwidth and axial ratio. Objective to cover the WLAN 5 GHz (4.915 - 5.825 GHz) bandwidth.
CHIU, PEI-YUAN, and 邱培源. "Printed monopole antenna designs for WLAN applications." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/81988507648488590921.
Full text國立高雄師範大學
物理學系
94
In this thesis, printed monopole antenna designs for the purpose of wider impedance bandwidths which can cover the 2.4/5.2/5.8 GHz triple-band WLAN operations are presented. Firstly, two innovative printed monopole antenna designs of different shape are proposed in Chapter 2 and 3, both designs have two different resonant paths for controlling the lower and upper resonances easily. Secondly, the printed monopole antenna design with one resonant path, and folded by a shorting pin is studied in Chapter 4. Simply by adding the parasitic element, as well as the generating of electromagnetic coupling between the resonant paths, all designs above-mentioned can easily achieve the WLAN 2.4/5.2/5.8 GHz triple-band operations.