By Hubregt J. Visser
ISBN-10: 0470512938
ISBN-13: 9780470512937
ISBN-10: 0470986395
ISBN-13: 9780470986394
This step by step advisor offers the reader with an in depth and thorough creation to useful antenna layout and version implementation
during this ebook, Hubregt J. Visser presents an advent to the basics of antenna layout and the implementation of layout types. quite a few antennas for instant functions and communications structures are defined, and the real-life use of the antennas is validated via large use of software examples. the writer comprises discussions at the layout strategy of a number of antennas, akin to intravascular MR Antennas, PCB antennas, RFID antennas, rectennas and so on. in addition, emphasis is put on machine Aided layout (CAD) utilizing approximated versions.
Key Features
- Includes insurance on intravascular MR Antennas, PCB antennas, RFID antennas, rectennas, and so forth
- Comprehensively info the appliance components, modeling, research, and validation strategies for person antennas
- Discusses using similar dipole antennas, identical transmission line networks and electrostatics
- Introduces many antennas and types that experience now not been coated in earlier guides (such as MRI Antennas, for instance)
This booklet can be of curiosity to microwave and antenna engineers. Graduate and post-graduate antennas scholars learning BSc and MSc classes, in addition to study assistants also will locate this e-book insightful.Content:
Chapter 1 creation (pages 1–17):
Chapter 2 Intravascular MR Antennas: Loops and Solenoids (pages 19–96):
Chapter three PCB Antennas: revealed Monopoles (pages 97–138):
Chapter four RFID Antennas: Folded Dipoles (pages 139–181):
Chapter five Rectennas: Microstrip Patch Antennas (pages 183–219):
Chapter 6 huge Array Antennas: Open?Ended Rectangular?Waveguide Radiators (pages 221–291):
Chapter 7 precis and Conclusions (pages 293–300):
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Additional info for Approximate Antenna Analysis for CAD
Sample text
Magnetic resonance imaging (MRI) does not employ ionizing radiation. A patient is positioned in a high-intensity static magnetic field. The magnetic field causes the spinpossessing molecules in the body to align their magnetic moments with this field. When a radio frequency (RF) pulse is emitted, causing the main magnetic field to deflect, the molecules absorb energy, which is reradiated after the RF pulse has ceased to exist. This reradiation induces a current in a receiver coil, and this received signal is a measure of the tissue being excited.
The normalization is with respect to . In the same figure, we show the results of a 20-term Fourier analysis, taken from [24, 25]. 98. The figure shows that, up to relatively large loop sizes, the loop reactance is well modeled by the first two terms of the Fourier analysis. 05 wavelengths. 05λ. 14. 15 Normalized impedance of a circular loop antenna in a dissipative medium for which α/β = 1. Exact, approximate and uniform-current analysis. e. the results of a uniform-current analysis. Finally, the figure shows the result of a rational-function interpolation [29] based on the two smallest two-term Fourier analysis results and the four smallest 20-term Fourier analysis results, bridging the gap between these two analyses.
57. J. Visser and M. Guglielmi, ‘CAD of waveguide array antennas based on “filter” concepts’, IEEE Transactions on Antennas and Propagation, Vol. 47, No. 3, pp. 542– 548, March 1999. 58. D. Bakers, Finite Array Antennas: An Eigencurrent Approach, PhD thesis, Eindhoven University of Technology, 2004. 59. B. Morsink, Fast Modeling of Electromagnetic Fields for the Design of Phased Array Antennas in Radar Systems, PhD thesis, Eindhoven University of Technology, 2005. 60. S. Monni, Frequency Selective Surfaces Integrated with Phased Array Antennas: Analysis and Design Using Multimode Equivalent Networks, PhD thesis, Eindhoven University of Technology, 2005.