LEADER 00755nam0-2200289---450- 001 990009158570403321 005 20100311100639.0 035 $a000915857 035 $aFED01000915857 035 $a(Aleph)000915857FED01 035 $a000915857 100 $a20100311d1980----km-y0itay50------ba 101 0 $aita 102 $aIT 105 $a--------001yy 200 1 $aAmbiente di lavoro$fNicola Messina 210 $aRoma$cIPSOA informatica$d1980 215 $a234 p.$d24 cm 225 1 $aDocumenti del lavoro$v5 700 1$aMessina,$bNicola$0507116 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990009158570403321 952 $aDPR 29-276$b8341$fDEC 959 $aDEC 996 $aAmbiente di lavoro$9777885 997 $aUNINA LEADER 05447nam 2200697 a 450 001 9910463924203321 005 20200520144314.0 010 $a1-283-14337-2 010 $a9786613143372 010 $a1-61344-081-2 010 $a1-84816-492-0 035 $a(CKB)3360000000001156 035 $a(EBL)731093 035 $a(OCoLC)741492794 035 $a(SSID)ssj0000509527 035 $a(PQKBManifestationID)12168684 035 $a(PQKBTitleCode)TC0000509527 035 $a(PQKBWorkID)10572466 035 $a(PQKB)11125836 035 $a(MiAaPQ)EBC731093 035 $a(WSP)0000P684 035 $a(PPN)167931393 035 $a(Au-PeEL)EBL731093 035 $a(CaPaEBR)ebr10479939 035 $a(CaONFJC)MIL314337 035 $a(EXLCZ)993360000000001156 100 $a20110318d2011 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 00$aUltrawideband antennas$b[electronic resource] $edesign and applications /$fDaniel Valderas ... [et al.] 210 $aLondon $cImperial College Press$d2011 215 $a1 online resource (210 p.) 300 $aDescription based upon print version of record. 311 $a1-84816-491-2 320 $aIncludes bibliographical references (p. 183-190) and index. 327 $aForeword; Acknowledgements; Authors; Contents; 1. Introduction to Ultrawideband Systems Cong Ling; 1.1 Overview; 1.2 UWB Schemes; 1.2.1 Impulse radio/time hopping; 1.2.2 Direct sequence; 1.2.3 Frequency hopping; 1.2.4 OFDM; 1.3 Industry Standards; 1.3.1 Single band versus multiband; 1.3.2 Standards; 1.4 Applications; 1.5 Challenges; 2. Figures of Merit for UWB Antennas David Puente and Daniel Valderas; 2.1 Requirements for a UWB Antenna; 2.1.1 Efficiency and matching; 2.1.2 Signal distortion and dispersion (ringing) 327 $a2.1.3 Stability over frequency of the transmission-reception transfer function2.1.3.1. Constant transfer function: Pulses selected directly by the source; 2.1.3.2. Variable transfer function: Concept of the antenna as a filter; 2.2 UWB Antenna Parameters; 2.2.1 Variability in the frequency domain; 2.2.1.1. Magnitude of the transfer function; 2.2.1.1.1. Stability of the reflection coefficient; 2.2.1.1.2. Polarisation stability; 2.2.1.1.3. Gain stability and channel losses; 2.2.1.2. Transfer function phase: Group delay; 2.2.2 Variability in the time domain: Pulse distortion parameters 327 $a2.2.2.1. Fidelity factor2.2.2.2. Time spread; 2.2.3 Variability in the space domain; 2.2.3.1. Statistical values; 2.2.3.1.1. Uniformity; 2.2.3.1.2. Spatially averaged transfer function (SATF); 2.2.3.1.3. Spatially averaged group delay (SAGD); 2.2.3.2. Correlation-based averages: Angular range; 2.3 Simulation in the Time Domain; 3. Classification of UWB Antennas David Puente and Daniel Valderas; 3.1 Helical Antennas; 3.2 Frequency-independent Antennas; 3.2.1 Spiral antennas; 3.2.2 Biconical antennas; 3.2.2.1. 3D biconical antennas; 3.2.2.2. 2D biconical antennas; 3.3 Log-periodic Antennas 327 $a3.4 Horn Antennas3.4.1 3D horn antennas; 3.4.2 2D horn antennas; 3.5 UWB Antennas Derived from Resonant Antennas; 3.5.1 3D monopoles; 3.5.1.1. Modifications to the geometry; 3.5.1.1.1. Euclidean shapes; 3.5.1.1.2. Computer optimisation; 3.5.1.1.3. Partial variation on a Euclidean shape; 3.5.1.2. Changes in current distribution; 3.5.1.2.1. Use of parasitic elements; 3.5.1.2.2. Use of a short-circuit pin; 3.5.1.2.3. Asymmetric feed; 3.5.1.2.4. Double feed; 3.5.2 2D resonant antennas; 3.5.2.1. Full 2D monopoles; 3.5.2.2. Slot antennas; 3.6 Conclusions 327 $a4. UWB Monopole Antenna Analysis Daniel Valderas and Juan I. Sancho4.1 Introduction; 4.2 Current-conductive Parts on Planar Monopole Antennas; 4.2.1 Currents parallel and perpendicular to the ground plane: A working hypothesis; 4.2.2 Non-radiating currents in a PMA; 4.3 Transmission Line Model for UWB Monopole Antennas; 4.3.1 General description; 4.3.2 Description of the model; 4.3.2.1. Transmission line; 4.3.2.2. Radiating structure; 4.3.3 Purpose of the analogy; 4.3.4 Graphical approach: The Smith Chart; 4.4 Design Based on TLM; 4.4.1 Design of an UWB-PMA antenna with a given bandwidth 327 $a4.4.2 Design of an UWB-PMA antenna having a maximised bandwidth 330 $aUltrawideband (UWB) technology, positioned as the cutting edge of research and development, paves the way to meet the emerging demands set by broadband wireless applications, such as high-speed data transmission, medical imaging, short-range radars, electromagnetic testing, etc. This breathtaking resource builds upon the basics of UWB technology to provide a complete compilation of figures of merit along with a vital state-of-the-art of the different antenna alternatives that are to be employed according to the specific application. Without excessive recourse to mathematics, this volume emphas 606 $aUltra-wideband antennas 606 $aUltra-wideband antennas$xDesign 608 $aElectronic books. 615 0$aUltra-wideband antennas. 615 0$aUltra-wideband antennas$xDesign. 676 $a621.382/4 676 $a621.3824 676 $a621.384135 701 $aValderas$b Daniel$0953323 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910463924203321 996 $aUltrawideband antennas$92155201 997 $aUNINA LEADER 03022nam 2200649Ia 450 001 9910140841203321 005 20170816114925.0 010 $a0-470-76851-7 010 $a1-119-20502-6 010 $a1-282-72887-3 010 $a9786612728877 010 $a0-470-76849-5 035 $a(CKB)2670000000035312 035 $a(EBL)573725 035 $a(OCoLC)659500729 035 $a(SSID)ssj0000404864 035 $a(PQKBManifestationID)12156636 035 $a(PQKBTitleCode)TC0000404864 035 $a(PQKBWorkID)10346619 035 $a(PQKB)10667998 035 $a(MiAaPQ)EBC573725 035 $a(CaSebORM)9780470547991 035 $a(EXLCZ)992670000000035312 100 $a20100211d2010 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aWinning with customers$b[electronic resource] $ea playbook for B2B /$fD. Keith Pigues, Jerry Alderman 205 $a1st edition 210 $aHoboken, NJ $cWiley$dc2010 215 $a1 online resource (486 p.) 300 $aIncludes index. 311 $a0-470-54799-5 327 $aWinning with Customers: A Playbook for B2B; Contents; Foreword by Karel Czanderna; Preface; Acknowledgments; Introduction by Glenn Dalhart; Chapter 1: Why We Lose; Chapter 2: Define Winning; Chapter 3: The Playbook; Chapter 4: Winning Metrics; Chapter 5: What Does Your Customer Think?; Chapter 6: Informing Decisions; Chapter 7: Executing Value Creation and Value Capture; Chapter 8: The Scoreboard; Chapter 9: Getting Started; Chapter 10: Sustaining and Scaling; Afterword; About the Authors; About the Contributors; Index; Appendix A: Our Approach to Certification and Building Capability 327 $aAppendix B: A Little More Background on Outside-In 330 $aDo Your Customers Make More Money Doing Business With You? Knowing the answer can help you build measurable and valuable customer relationships, outperform the competition, and unlock profitable growth. Companies are blind to opportunities for profitable customer relationships without a deep understanding of how they create customer value relative to competitors. With a rigorous and measurable understanding of how customers make more money today and in the future with you, combined with supporting plans and tools to align the entire organization for success, a company can win 606 $aCustomer relations$xManagement 606 $aConsumer satisfaction 606 $aCustomer services$xManagement 608 $aElectronic books. 615 0$aCustomer relations$xManagement. 615 0$aConsumer satisfaction. 615 0$aCustomer services$xManagement. 676 $a658.8 676 $a658.8/04 686 $a85.40$2bcl 700 $aPigues$b D. Keith$0921707 701 $aAlderman$b Jerry D$0921708 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910140841203321 996 $aWinning with customers$92067942 997 $aUNINA