Editor-in-Chief Zhi Ning Chen Duixian Liu · Hisamatsu Nakano Editors Xianming Qing · Thomas Zwick Handbook of Antenna Technologies 1 3 Reference Handbook of Antenna Technologies Zhi Ning Chen Editor-in-Chief (cid:129) Duixian Liu Hisamatsu Nakano (cid:129) Xianming Qing Thomas Zwick Editors Handbook of Antenna Technologies With2473Figuresand176Tables Editor-in-Chief ZhiNingChen DepartmentofElectricalandComputer Engineering NationalUniversityofSingapore Singapore,Singapore Editors DuixianLiu HisamatsuNakano IBMT.J.WatsonResearchCenter FacultyofScienceandEngineering YorktownHeights,NY,USA HoseiUniversity Koganei,Tokyo,Japan XianmingQing ThomasZwick InstituteforInfocommResearch KarlsruheInstituteofTechnology Singapore,Singapore Karlsruhe,Baden-Wurttemberg,Germany ISBN978-981-4560-43-6 ISBN978-981-4560-44-3(eBook) ISBN978-981-4560-45-0(printandelectronicbundle) DOI10.1007/978-981-4560-44-3 LibraryofCongressControlNumber:2016934309 #SpringerScience+BusinessMediaSingapore2016 Thisworkissubjecttocopyright.AllrightsarereservedbythePublisher,whetherthewholeorpartofthe materialisconcerned,specificallytherightsoftranslation,reprinting,reuseofillustrations,recitation, broadcasting,reproductiononmicrofilmsorinanyotherphysicalway,andtransmissionorinformation storageandretrieval,electronicadaptation,computersoftware,orbysimilarordissimilarmethodology nowknownorhereafterdeveloped. Theuseofgeneraldescriptivenames,registerednames,trademarks,servicemarks,etc.inthispublication doesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfromtherelevant protectivelawsandregulationsandthereforefreeforgeneraluse. Thepublisher,theauthorsandtheeditorsaresafetoassumethattheadviceandinformationinthisbook arebelievedtobetrueandaccurateatthedateofpublication.Neitherthepublishernortheauthorsorthe editorsgiveawarranty,expressorimplied,withrespecttothematerialcontainedhereinorforanyerrors oromissionsthatmayhavebeenmade. Printedonacid-freepaper ThisSpringerimprintispublishedbySpringerNature TheregisteredcompanyisSpringerNatureSingaporePteLtd. The registered company address is: 152 Beach Road, #22-06/08 Gateway East, Singapore 189721, Singapore To my father Mr. Chen Liang and my mother Mrs. Wang Ruizhi for my inheriting their patience, persistence, and perseverance. (To my father I dedicate this volume in token of affection and gratitude.) To my wife Mrs. Liu Lin and my twin sons Shifeng and Shiya for their fully understanding and supporting me to work on this huge project. Foreword It is my great pleasure to write a foreword for this very important Antenna Hand- book. This, the sesquicentennial year of the completion of Maxwell’s equations in 1865, is a conspicuous year to publish this handbook. Even though antenna tech- nologyhasbeenaroundforaboutahundredyears,itsimportanceremainshitherto. The key experiment done by Heinrich Hertz in 1886 proved that wireless signal transfer was possible. Furthermore, the work of Guglielmo Marconi in 1895 underscored the importance of wireless communications. He subsequently used simple antennas to transmit radio signals over the earth’s surface: the antenna was a quarter wave dipole mounted on the earth’s surface, and the receiver was a long stringofwireraisedbywindpower,namely,akite.Ontheotherhand,NicolaTesla was investigating the use of induction coil for wireless power transfer as far back as1891. Communication, remote sensing, and radar technologies have induced antenna technology to grow by leaps and bounds. Some of the most notable ones are the Yagi-Udaantennainventedin1926,hornantenna,antennaarray,reflectorantenna, andpatchantenna.PatchormicrostripantennawassuggestedbyGeorgeDeschamps in1953,andlaterdevelopedfurtherbymanyworkers,includingYuenTseLo.Also, PaulMayesworkedonbroadbandantennas,suchasthelog-periodicarrayantenna, which morphed from the Yagi-Uda antenna. Deschamps, Lo, and Mayes were my former close colleagues. The importance of antenna technology is more recently magnifiedbythedemandinthecellphoneindustry,callingforeversmallerantennas andcontinuousminiaturization. The advent of computer technology instillsthe growth of numerical methods to model antenna structures. The growth of numerical methods which are robust, efficient,andfastalgorithmstosolveproblemsgivesrisetoasleuthofcommercial softwaretosimulateantennaperformance.Antennascanbevirtuallyprototypedina computer, and their performance optimized before their actual fabrication. This processgivesrisetogreatcostreduction,aswellastheopportunityforcut-and-try engineeringwithoutincurringexorbitantcosts. Theeaseofantennadesignisgreatlyaidedbytheavailabilityofmanycommer- cialsimulationsoftwaresuites.Moreover,thesesoftwaresuitesunleashthecreative energy of many antenna engineers, expanding their design space. Examples of the numerical methods that have found their ways into commercial software suites are vii viii Foreword thefiniteelementmethod,methodofmoments,andfastmultipolealgorithms.Many morewillemergeincommercialsoftware:thegenerallagtimebetweenconception inresearchandmigrationtocommercialapplicationsisaboutadecadeortwo.The growthofcomputationalelectromagneticsinantennadesign,inadditiontohardware gainsincomputertechnology,isalsopropelledbytheemergenceoffastsolverssuch as fast multipole solvers, hierarchical matrix solvers, and reduced rank matrix solvers. Antenna design is also an interesting area where wave physics meets circuit physics.Thewayenergyisfedintoanantennaisviadesignofmatchingnetworks drawing upon the vast knowledge in circuit design. However, the way energy is transmitted from antenna to antenna is via wave physics; hence the concept of antennaaperture,gain,radiationpattern,andpolarizationareinstrumentalinantenna design. Therefore, low frequency as well as high frequency electromagnetics are equallyimportant.Infact,formanyreflectorantennas,thewavesareintheirquasi- opticalregime,allowingtheiranalysiswithhigh-frequencytechniquesandapprox- imations. On the other hand, the interface with circuit physics calls for multiscale analysiswhichisaferventareaofresearchincomputationalelectromagnetics. Due to the rapid growth of nanofabrication technology, nanostructures on the orderofopticalwavelengthsarenowpossible.Thisspursthegrowthofnanoantenna technologyintheopticalregime.Manyantennaconceptsinthemicrowaveregime need to be revisited or reused in the optical regime. This has been used for spontaneous and stimulated emission, and the enhancement of the Purcell factor. Thisisanareainneedofnewideasaswell. Iamalsoveryhappytoseethatthecollectionofthesechaptersisdoneunderthe leadership of Prof. Zhi Ning Chen at the National University of Singapore. I have knownProf.ChensincehewasayoungmaninChina,andduringmyveryfirsttrip to China in 1994. Being born overseas, my first trip to China was full of clash betweenfantasyandreality.ButProf.Chenimpressedmeasaforthrightyoungman with great curiosity. The economic growth of the pacific-rim region, including Singapore, also touches a resounding chord in me since I grew up in Malaysia when it was still one country with Singapore. I was happy to learn of the creative researchofProf.CheninbothNationalUniversityofSingapore(NUS)andInstitute of Infocomm Research (I2R) in Singapore on my various trips to Singapore. This handbook, being published on SG50, the 50th anniversary year of the founding of Singaporein1965,alsobearsspecialmeaning. October10,2015 WengChoCHEW UniversityofIllinoisatUrbana-Champaign Preface AcenturyandahalfhavepassedsinceJamesClerkMaxwell(1831–1879)published ADynamicalTheoryoftheElectrodynamicField,whichfeaturestheoriginalsetof Maxwell’sequations.Through these equations,Maxwell mathematically described the diffusion of light and electromagnetic waves travelling through space at the speed of light. His equations have been undoubtedly the most important break- throughfollowingIsaacNewton’sformulationofthelawsofmotionandgravity.His contributionhadaffected–andcontinuestoaffect–thephysicsworldandourdaily life. He is considered the founder of the field of electromagnetic theory. The publication of the Handbook of Antenna Technologies is dedicated to the 150th AnniversaryofMaxwell’sEquations. Withtherapiddevelopmentofverylargescaleintegration(VLSI)andcomputer science, wireless technologies have quickly penetrated all aspects of our daily life; almost everyone has at least one wireless device such as a mobile phone, laptop, contactlesssmartcard,orsmartwatchonthemove.Asthekeydeviceofradiation and induction of electromagnetic waves or fields, antennas have certainly played a unique and irreplaceable role in all wireless systems. As a result, these new appli- cations have greatly driven the focus on antenna technology to high performance, smallsize,andembeddableconfiguration,especiallyinthepastthreedecades. The state-of-the-artantenna hasbeen electrically controllable, or regarded as an intelligent sub-system integrated with a signal processing unit instead of only a passive hardware component. As such, beamforming, multiple-input-multiple-out- put (MIMO), massive MIMO, multibeam antenna systems, and so on have been widely implemented in advanced mobile communications, radars, and imaging systems. With more and more complicated functions for antenna technologies, the designandoptimizationofantennasmustbecarriedoutatasystemlevel.Toachieve the desired system performance, the antennas should be designed closely with radiofrequency (RF) channels, RF front ends, and even signal processing unit, of which MIMO systems have been an excellent example. Also, the groundbreaking antennatechnologiesstronglyrelyontheprogressinnewmaterialsandfabrication processes. Like the existing printed circuit board (PCB) and low-temperature co-fired ceramic (LTCC) processes, the recently developed additive process-based three-dimensional (3D) printing has started a new phase for antenna design and fabrication. Unfortunately, we do not have too many new materials for antennas. ix
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