Download Antennas for Global Navigation Satellite Systems by Xiaodong Chen, Clive G. Parini, Brian Collins, Yuan Yao, PDF
By Xiaodong Chen, Clive G. Parini, Brian Collins, Yuan Yao, Masood Ur Rehman
Chapter 1 basics of GNSS (pages 1–19):
Chapter 2 basic issues for GNSS Antennas (pages 21–40):
Chapter three satellite tv for pc GNSS Antennas (pages 41–53):
Chapter four Terminal GNSS Antennas (pages 55–80):
Chapter five Multimode and complicated Terminal Antennas (pages 81–110):
Chapter 6 Terminal Antennas in tricky Environments (pages 111–148):
Chapter 7 Human consumer results on GNSS Antennas (pages 149–180):
Chapter eight cellular Terminal GNSS Antennas (pages 181–206):
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Extra resources for Antennas for Global Navigation Satellite Systems
Y The net exciting current in TM010 mode ﬂows in the y-direction. y In a square patch antenna, the TMx010 and TM010 modes have the same resonant frequency, so if we excite these two modes simultaneously with a 90◦ time–phase difference, a CP wave can be launched. A similar analysis can be applied to a circular patch antenna which supports the fundamental TM110 mode in both the x- and y-directions. Basically, there are two feeding approaches to achieve CP on a patch antenna: 1. Dual-fed CP patch antenna: In this design, two feed ports are excited with orthogonal currents having 90◦ phase difference.
A practical dipole will be discussed again in Chapter 6. 7 The 2D radiation pattern of a half-wavelength dipole. 3 CP Antenna Design As we mentioned earlier, CP antennas are required for optimum reception of GNSS signals. We will cover CP antenna design issues in this section. 1 CP Antenna Fundamentals and Types CP antennas can be realised in design through different structures and feeding techniques. In terms of structures, CP antennas can be classiﬁed into helical, spiral and microstrip patch types.
This imposes another constraint in the design of GNSS antennas. This issue is addressed in the following chapters. References 1. , A-GPS: Assisted GPS, GNSS, and SBAS , Artech House, London, 2009. 2. , New York, 1997. 3. L. , Antennas Theory & Design, John Wiley & Sons, Ltd, Chichester, 1981. 4. CST Microwave Studio, User Manual , 2009. 5. R. , Handbook of microstrip antennas, Peter Peregrinus, London, 1989. 6. , Krier, M. , ‘Mobile handset system performance comparison of a linearly polarized GPS internal antenna with a circularly polarized antenna’, Proceedings of IEEE Antennas and Propagation Society International Symposium 2003, Columbus, OH, June 22–27, 2003, Vol.