Teresa M. Braun, Walter R. Braun

Satellite Communications Payload and System (eBook, ePUB)

• Format: ePub

Produktbeschreibung

SATELLITE COMMUNICATIONS PAYLOAD AND SYSTEM A valuable reference on communications satellite systems This book presents the state of the art in commercial communications satellite systems, thoroughly and in detail not to be found in any other book. These systems provide the television and some of the telephone and Internet services in use every day. The book focuses on the satellite payload, which consists of antennas, receivers, and transmitters. The book discusses the what, the how, and the why of various choices that have been made in currently operating systems. The book is organized into three parts: * In-depth description of various payload units, not requiring specialist knowledge. For each unit and the payload as a whole, the architectures, the theory of operation, analysis, performance, and specifications are presented. * End-to-end system context in which the payload operates. Digital communications theory and satellite communications protocols are introduced. The time-varying properties of satellite-to-ground links are explored. Tips on system simulation are given. * Current commercial end-to-end satellite communications systems, in their grand variety. Emphasis is placed on the satellite payload and its interactions with the satellite bus, ground stations, and user terminals. The second edition adds the third part of the book. Payload unit descriptions have been updated and enlarged. The communications theory chapter has been upgraded and the protocols chapter added to briefly describe all the elements mentioned in part 3. Non-geostationary satellite considerations have been included throughout the book. If you are a payload systems engineer, this book can serve as a valuable tool for expanding your knowledge base. If you're a graduate student, it will guide your introductory learning. As an industry professional, you can make this book a go-to reference.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 720
• Erscheinungstermin: 13. Juli 2021
• Englisch
• ISBN-13: 9781119384328
• Artikelnr.: 62301601

Autorenporträt

Teresa M. Braun, PhD, has 26 years of experience in satellite and ground systems and technology, including 23 years in communications and three years in navigation at major corporations. She is the author of the first edition of Satellite Communications Payload and System and the co-proprietor of Braun Communications Consulting GmbH in Switzerland. Walter R. Braun, PhD, has over 40 years of experience in communication systems technology and analysis in the areas of satellite, military, mobile, powerline, and secure communications, mostly in Switzerland. He is the co-proprietor of Braun Communications Consulting GmbH.

Inhaltsangabe

1 Introduction 2

1.1 End-to-End Satellite Communications System 2

1.2 What the Book Is About 3

1.3 Channel and Channel Sharing 3

1.4 Payload 4

1.5 Ground Transmitter and Ground Receiver 7

1.6 System 8

1.7 Conventions 8

1.8 Book Sources 9

1.9 Summary of Rest of Book 10

References 12

PART I. PAYLOAD 2

2 Payload's On-Orbit Environment 2

2.1 What Determines Environment 2

2.2 On-Orbit Environment and Mitigation by Spacecraft Bus 8

2.3 General Effects of Mitigated Environment on Payload 19

References 24

3 Antenna Basics and Single-Beam Antenna 2

3.1 Introduction 2

3.2 Examples of Single-Beam Antenna 2

3.3 General Antenna Concepts 3

3.4 Reflector-Antenna Basics 9

3.5 Steerable Single-Beam Antennas 15

3.6 Reflector Technology for Single-Beam Antennas 16

3.7 Horn for Single-Beam Antennas 17

3.8 Other Antenna Components 20

3.9 Antenna Pointing Error 24

3.10 Antenna Autotrack 26

3.11 Reflector-Antenna Inefficiencies 28

3.12 Testing 32

References 35

4 Payload-Integration Elements 2

4.1 Introduction 2

4.2 Coaxial Cable vs. Waveguide 2

4.3 Coaxial Cable 2

4.4 Waveguide 7

4.5 Other Integration Elements 13

4.6 Redundancy Configurations 17

4.7 Impedance Mismatch and Scattering Parameters 21

References 26

5 Microwave Filter 2

5.1 Introduction 2

5.2 Basics of Analog Filters 2

5.3 Basics of Specifically Microwave Filters 7

5.4 Technology for Bandpass Filters 13

5.5 Filter Units 17

5.6 Bandpass Filter Specification 23

References 24

6 Low-Noise Amplifier and Frequency Converter 2

6.1 Introduction 2

6.2 LNAs and Frequency Converters in Payload 2

6.3 Nonlinearity of LNA and Frequency Converter 4

6.4 Noise Figure 8

6.5 Low-Noise Amplifier 8

6.6 Frequency Converter 11

6.7 Receiver 23

6.A Appendix. Formula for Integrating Phase Noise Spectrum 24

References 24

7 Preamplifier and High-Power Amplifier 2

7.1 Introduction 2

7.2 HPA Concepts and Terms 2

7.3 Traveling-Wave Tube Amplifier vs. Solid-State Power Amplifier 7

7.4 Traveling-Wave Tube Subsystem 9

7.5 Solid-State Power Amplifier 26

References 34

8 Payload's Analog Communications Parameters 2

8.1 Introduction 2

8.2 Gain Variation with Frequency 4

8.3 Phase Variation with Frequency 7

8.4 Channel Bandwidth 9

8.5 Phase Noise 10

8.6 Frequency Stability 10

8.7 Spurious Signals from Frequency Converter 10

8.8 HPA Nonlinearity 11

8.9 Near-Carrier Spurious Signals from HPA Subsystem 12

8.10 Stability of Gain and Power-Out 13

8.11 Equivalent Isotropic Radiated Power 14

8.12 Figure of Merit G/Ts 15

8.13 Saturation Flux Density 17

8.14 Self-Interference 17

8.15 Passive Intermodulation Products 19

8.A Appendices 20

References 21

9 More Analyses for Payload Development 2

9.1 Introduction 2

9.2 How to Deal with Noise Figure 2

9.3 How to Make and Maintain Payload Performance Budgets 4

9.4 HPA Topics 16

9.5 What Nonlinearity Does to Modulated Signal 20

9.6 Simulating Payload Performa