LEADER 05276nam 2200625Ia 450 001 9910143591303321 005 20170815111634.0 010 $a1-280-72126-X 010 $a9786610721269 010 $a0-470-05684-3 010 $a0-470-05682-7 035 $a(CKB)1000000000357059 035 $a(EBL)281590 035 $a(OCoLC)86073535 035 $a(SSID)ssj0000263681 035 $a(PQKBManifestationID)11225350 035 $a(PQKBTitleCode)TC0000263681 035 $a(PQKBWorkID)10275258 035 $a(PQKB)11453221 035 $a(MiAaPQ)EBC281590 035 $a(EXLCZ)991000000000357059 100 $a20061013d2007 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 00$aUltra-wideband$b[electronic resource] $eantennas and propagation for communications, radar and imaging /$fedited by Ben Allen ... [et al.] 210 $aChichester $cJohn Wiley$dc2007 215 $a1 online resource (509 p.) 300 $aDescription based upon print version of record. 311 $a0-470-03255-3 320 $aIncludes bibliographical references and index. 327 $aUltra-Wideband Antennas and Propagation for Communications, Radar and Imaging; Contents; Editors; Prime Contributors; Preface; Acknowledgments; Abbreviations & Acronyms; 1 Introduction to UWB Signals and Systems; 1.1 History of UWB; 1.2 Motivation; 1.2.1 Large Absolute Bandwidth; 1.2.2 Large Relative Bandwidth; 1.3 UWB Signals and Systems; 1.3.1 Impulse Radio; 1.3.2 DS-CDMA; 1.3.3 OFDM; 1.3.4 Frequency Hopping; 1.3.5 RADAR; 1.3.6 Geolocation; 1.4 Frequency Regulation; 1.5 Applications, Operating Scenarios and Standardisation; 1.6 System Outlook; References; Part I Fundamentals 327 $aIntroduction to Part I2 Fundamental Electromagnetic Theory; 2.1 Introduction; 2.2 Maxwell's Equations; 2.2.1 Differential Formulation; 2.2.2 Interpretation; 2.2.3 Key to Antennas and Propagation; 2.2.4 Solving Maxwell's Equations; 2.2.5 Harmonic Representation; 2.3 Resulting Principles; References; 3 Basic Antenna Elements; 3.1 Introduction; 3.2 Hertzian Dipole; 3.2.1 Far-Field - Fraunhofer Region; 3.2.2 Near-Field - Fresnel Region; 3.3 Antenna Parameters and Terminology; 3.3.1 Polarisation; 3.3.2 Power Density; 3.3.3 Radiated Power; 3.3.4 Radiation Resistance; 3.3.5 Antenna Impedance 327 $a3.3.6 Equivalent Circuit3.3.7 Antenna Matching; 3.3.8 Effective Length and Area; 3.3.9 Friis' Transmission Formula; 3.3.10 Radiation Intensity; 3.3.11 Radiation Pattern; 3.3.12 (Antenna) Bandwidth; 3.3.13 Directive Gain, Directivity, Power Gain; 3.3.14 Radiation Efficiency; 3.4 Basic Antenna Elements; 3.4.1 Finite-Length Dipole; 3.4.2 Monopole; 3.4.3 Printed Antennas; 3.4.4 Wideband and Frequency-Independent Elements; References; 4 Antenna Arrays; 4.1 Introduction; 4.2 Point Sources; 4.2.1 Point Sources with Equal Amplitude and Phase 327 $a4.2.2 Point Sources with Equal Amplitude and 180 Degrees Phase Difference4.2.3 Point Sources of Unequal Amplitude and Arbitrary Phase Difference; 4.3 The Principle of Pattern Multiplication; 4.4 Linear Arrays of n Elements; 4.5 Linear Broadside Arrays with Nonuniform Amplitude Distributions; 4.5.1 The Binomial Distribution; 4.5.2 The Dolph-Tschebyscheff Distribution; 4.6 Planar Arrays; 4.6.1 Rectangular Arrays; 4.6.2 Circular Arrays 63; 4.7 Design Considerations; 4.7.1 Mutual Coupling; 4.7.2 Array Gain; 4.8 Summary; References; 5 Beamforming; 5.1 Introduction; 5.1.1 Historical Aspects 327 $a5.1.2 Concept of Spatial Signal Processing5.2 Antenna Arrays; 5.2.1 Linear Array; 5.2.2 Circular Array; 5.2.3 Planar Array; 5.2.4 Conformal Arrays; 5.3 Adaptive Array Systems; 5.3.1 Spatial Filtering; 5.3.2 Adaptive Antenna Arrays; 5.3.3 Mutual Coupling and Correlation; 5.4 Beamforming; 5.4.1 Adaptive Antenna Technology; 5.4.2 Beam Steering; 5.4.3 Grating Lobes; 5.4.4 Amplitude Weights; 5.4.5 Window Functions; 5.5 Summary; References; 6 Antenna Diversity Techniques; 6.1 Introduction; 6.2 A Review of Fading; 6.2.1 Signal Fading; 6.2.2 Channel Distribution; 6.3 Receive Diversity 327 $a6.3.1 Single Branch without Diversity 330 $aProviding up-to-date material for UWB antennas and propagation as used in a wide variety of applications, ""Ultra-wideband Antennas and Propagation for Communications, Radar and Imaging"" includes fundamental theory, practical design information and extensive discussion of UWB applications from biomedical imaging, through to radar and wireless communications. An in-depth treatment of ultra-wideband signals in practical environments is given, including interference, coexistence and diversity considerations. The text includes antennas and propagation in biological media in addition to more co 606 $aUltra-wideband antennas 606 $aBroadband communication systems 608 $aElectronic books. 615 0$aUltra-wideband antennas. 615 0$aBroadband communication systems. 676 $a621.3824 676 $a621.38835 701 $aAllen$b Ben$g(Benjamin Hugh)$0872877 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910143591303321 996 $aUltra-wideband$92139721 997 $aUNINA