Download Antennas: From Theory to Practice by Yi Huang, Kevin Boyle PDF

Communications

By Yi Huang, Kevin Boyle

ISBN-10: 0470510285

ISBN-13: 9780470510285

Useful, concise and whole reference for the fundamentals of recent antenna layout Antennas: from conception to perform discusses the fundamentals of recent antenna layout and conception. built particularly for engineers and architects who paintings with radio communications, radar and RF engineering, this booklet bargains sensible and hands-on remedy of antenna idea and strategies, and gives its readers the abilities to examine, layout and degree a variety of antennas. Key positive factors: * offers thorough insurance at the fundamentals of transmission traces, radio waves and propagation, and antenna research and layout* Discusses business commonplace layout software program instruments, and antenna dimension gear, amenities and methods* Covers electrically small antennas, cellular antennas, UWB antennas and new fabrics for antennas* additionally discusses reconfigurable antennas, RFID antennas, Wide-band and multi-band antennas, radar antennas, and MIMO antennas* layout examples of assorted antennas are supplied* Written in a pragmatic and concise demeanour by way of authors who're specialists in antenna layout, with event from either academia and This ebook should be a useful source for engineers and architects operating in RF engineering, radar and radio communications, looking a accomplished and functional advent to the fundamentals of antenna layout. The ebook is additionally used as a textbook for complicated scholars getting into a career during this box.

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B. e. 19 dB The return loss is slightly increased, as expected. 8. e. 47l dB. 9. 41) Obviously, the VSWR is just another measure of how well a transmission line is matched with its load. Unlike the reflection coefficient, the VSWR is a scalar and has no phase information. For a nonperfect transmission line, the VSWR is a function of the length of the line (l) as well as the load impedance and the characteristic impedance of the line. But for a lossless transmission line, the VSWR is the same at any reference point of the line.

5: Reflection coefficient and return loss of a low-loss transmission line. 2 Np/m at 1 GHz. a. What is the voltage reflection coefficient for l = 0 and λ/4, respectively? b. Plot the return loss as a function of the line length. 5. 2 Np/m. 5 a. 1952 Z L + Z0 This means that not only the phase of the reflection coefficient but also the amplitude is changed when the length of the transmission line is increased by a quarter-wavelength. b. e. 19 dB The return loss is slightly increased, as expected.

14. This condition means that the tangential components of an electric field (nˆ × E) are continuous across the boundary between any two media. 39) where Js is the surface current density and ρ s is the surface charge density. These results can be interpreted as r the change in tangential component of the magnetic field across a boundary is equal to the surface current density on the boundary; r the change in the normal component of the electric flux density across a boundary is equal to the surface charge density on the boundary; r the normal component of the magnetic flux density is continuous across the boundary between two media, whilst the normal component of the magnetic field is not continuous unless μ1 = μ2 .

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