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[null,"1.","Record Nr.",null,"UNINA9911026170803321"]
[null,null,"Autore",null,"Graham Ian (Engineer)"]
[null,null,"Titolo",null,"Designing RF Combining Systems for Shared Radio Sites / / Ian Graham"]
[null,null,"Pubbl/distr/stampa",null,"Norwood : , : Artech House, , [2024]"]
[{"$nulls":4},"©2024"]
[null,null,"ISBN",null,"9781685690267"]
[{"$nulls":4},"1685690262"]
[null,null,"Edizione",null,"[1st ed.]"]
[null,null,"Descrizione fisica",null,"1 online resource (xv, 286 pages) : illustrations, charts"]
[null,null,"Collana",null,"Artech House mobile communications library"]
[null,null,"Soggetti",null,"Radio relay systems"]
[{"$nulls":4},"Emergency communication systems"]
[{"$nulls":4},"Mobile communication systems"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Nota di bibliografia","Includes bibliographical references and index."]
[null,null,"Nota di contenuto",null,"Designing RF Combining Systems for Shared Radio Sites -- Contents -- Preface -- Introduction -- 1 Repeater Site RF Systems Overview -- 1.1 Single-Channel Duplexed System -- 1.2 Multichannel System -- 2 Surveying the Sites -- 2.1 Site Survey -- 2.2 Tower Mapping -- 2.3 RF Surveys -- 2.3.1 Spectrum Monitoring -- 2.3.2 Noise Monitoring -- 2.4 Tower Structural Survey -- 3 Essential Background -- 3.1 Noise in RF Systems -- 3.1.1 The Behavior of Noise in RF Systems -- 3.1.2 Noise Figure -- 3.2 IM -- 3.2.1 Third-Order IM and Third-Order Intercept Point -- 3.2.2 Third-Order IM with Unequal Input Signals -- 3.2.3 Third-Order IM with Three Input Signals -- 3.2.4 Fifth-Order IM and Fifth-Order IP -- 3.2.5 Fifth-Order IM with Unequal Input Signals -- 3.2.6 Fifth-Order IM with Three Input Signals -- 4 Sources of Interference at Shared Radio Sites -- 4.1 Transmitter Harmonics -- 4.2 Transmitter Sideband Noise -- 4.3 Transmitter IM -- 4.4 Receiver Blocking -- 4.5 Receiver IM -- 4.6 Minimizing Site Interference by Antenna Placement and Frequency Planning -- 5 Antennas and Site Antenna Systems -- 5.1 The Isotropic Radiator -- 5.2 Antenna Specifications -- 5.2.1 Directivity -- 5.2.2 Gain -- 5.2.3 Beamwidth -- 5.2.4 Reciprocity -- 5.2.5 E-Plane -- 5.2.6 H-Plane -- 5.2.7 Azimuth -- 5.3 Omnidirectional Antennas -- 5.3.1 Half-Wave Dipole -- 5.3.2 Half-Wave Folded Dipole -- 5.3.3 Quarter-Wave Monopole -- 5.3.4 Dipole Arrays -- 5.3.5 Binary Dipole Array -- 5.3.6 Elliptical Dipole Array -- 5.3.7 Offset Dipole "]
[{"$nulls":4},"Array -- 5.3.8 Colinear Antennas -- 5.3.9 Dual Antennas -- 5.4 Directional Antennas -- 5.4.1 Yagi-Uda -- 5.4.2 Panel Antennas -- 5.5 Down-Tilt -- 5.6 Calculating the Isolation Between Antennas on a Radio Tower -- 5.6.1 Isolation Between Horizontally Separated Antennas -- 5.6.2 Isolation Between Vertically Separated Antennas."]
[{"$nulls":4},"5.6.3 Isolation Between Slant Separated Antennas -- 5.7 Antenna System Topology -- 5.8 Site Antenna System Design Rules -- Selected Bibliography -- 6 Calculating the Interference Threshold -- 6.1 Calculating the Initial Receiver Sensitivity -- 6.2 Adding the Effect of Site Noise -- 6.3 Calculating the 1-dB Interference Threshold -- 6.4 Accounting for Multiple Interference Mechanisms -- 6.5 Recalculating the Final Receiver Sensitivity -- 6.6 Summary -- Reference -- 7 Duplexers -- 7.1 Types of Duplexers -- 7.2 Specifying Duplexer Design Requirements -- 7.2.1 Transmit to Antenna Filter -- 7.2.2 Antenna to Receiver Filter -- 7.2.3 Final Duplexer Frequency Response -- 7.3 Duplexers and Passive IM -- Selected Bibliography -- 8 Transmitter Combining Systems -- 8.1 Isolators -- 8.2 Cavity Filters -- 8.3 Types of Transmitter Combiners -- 8.3.1 T-Pass Transmitter Combiners -- 8.3.2 Star Combiners -- 8.3.3 Hybrid Combiners -- 8.3.4 Combinations of Different Types -- 8.4 Specifying Transmitter Combiner Design Requirements -- 8.5 Differences for Duplexed Multichannel Systems -- 8.6 Site Transmitter Combiner Design Rules -- Selected Bibliography -- 9 Receiver Multicoupling Systems -- 9.1 Receiver Sensitivity -- 9.2 Types of Receiver Multicouplers -- 9.2.1 Standard Multicoupler -- 9.2.2 Channelized Multicoupler -- 9.2.3 Use of Crystal Filters in Channelized Multicouplers -- 9.3 Use of Tower Top Amplifiers in Receiver Multicouplers -- 9.4 Correctly Setting the Gain of Receiver Multicoupling Systems -- 9.5 Calculating Receiver Filter Requirements -- 9.6 Differences for Duplexed Multichannel Systems -- 9.7 Site Receiver Multicoupler Design Rules -- Selected Bibliography -- 10 Power and Antenna System Monitors -- 10.1 Power Monitors -- 10.2 Antenna System Monitors -- References -- 11 Transmission Line Systems."]
[{"$nulls":4},"11.1 Transmission Line Systems for Multichannel Site RF System Designs -- 11.2 Transmission Line Systems for Single-Channel Duplexed RF System Designs -- 11.3 RF Surge Suppression Devices -- 11.4 Transmission Line Grounding Devices -- Selected Bibliography -- 12 Design Example -- 12.1 Information Gathering -- 12.1.1 Site Survey -- 12.1.2 Tower Mapping -- 12.1.3 RF Survey -- 12.2 Antenna System Design -- 12.3 Calculating the Interference Threshold -- 12.4 Transmitter Combiner Design -- 12.5 Receiver Multicoupler Design -- 12.5.1 Gain Setting -- 12.5.2 Calculating the Receiver Filter Requirements -- 12.6 Antenna System Monitor -- 12.7 Transmission Line System -- 12.7.1 RF Surge Suppression Devices -- 12.7.2 Transmission Line Grounding Devices -- 12.8 The Finished Design -- 12.9 Concluding Remarks -- Selected Bibliography -- About the Author -- Index."]
[null,null,null,"Sommario/riassunto","\"This book explores Radio Access Networks (RANs) within LMR systems, comprising base stations, mobile radios, and hand portable radios. These components facilitate communication among end users via a network of fixed base stations, antennas, and combining systems strategically placed across radio repeater sites throughout the coverage area. This resource also delves into the consequences of interference, highlighting the painstaking efforts required to diagnose and rectify interference issues through field testing and redesign. The central focus being on the design intricacies of base station antennas and combining systems at densely populated shared radio repeater sites. "]
[{"$nulls":4},"The book underscores how to identify potential sources of interference from co-located transmitters and receivers, effectively surveying sites to anticipate high-level interfering signals. This critical information forms the foundation for crafting base station antenna and combining systems that curtail interference, subsequently optimizing coverage and minimizing costs. Throughout its pages, the book lays out a detailed roadmap for designing LMR systems resilient to interference. By outlining essential principles and methodologies, the book guides practitioners in creating LMR networks that flawlessly align with end users' communication requirements. The resulting systems not only meet expectations but surpass them, offering the coverage area and communication quality demanded by public safety and utility organizations during critical operations. Ultimately, the book serves as an indispensable resource for engineers, designers, and professionals engaged in crafting LMR systems capable of delivering impeccable performance and reliability.\"--Publisher website."]