By Yi Huang

ISBN-10: 0470510285

ISBN-13: 9780470510285

**Practical, concise and whole reference for the fundamentals of recent antenna design**

*Antennas: from thought to Practice* discusses the fundamentals of recent antenna layout and thought. built in particular for engineers and architects who paintings with radio communications, radar and RF engineering, this booklet bargains useful and hands-on therapy of antenna thought and strategies, and offers its readers the abilities to examine, layout and degree a variety of antennas.

*Key features:*

- Provides thorough assurance at the fundamentals of transmission traces, radio waves and propagation, and antenna research and design
- Discusses business ordinary layout software program instruments, and antenna size gear, amenities and techniques
- Covers electrically small antennas, cellular antennas, UWB antennas and new fabrics for antennas
- Also discusses reconfigurable antennas, RFID antennas, Wide-band and multi-band antennas, radar antennas, and MIMO antennas
- Design examples of assorted antennas are provided
- Written in a pragmatic and concise demeanour through authors who're specialists in antenna layout, with adventure from either academia and industry

This publication might be a useful source for engineers and architects operating in RF engineering, radar and radio communications, looking a complete and sensible advent to the fundamentals of antenna layout. The publication is usually used as a textbook for complex scholars getting into a career during this box

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**Extra info for Antennas. From theory to practice**

**Example text**

R There are two resonant points (where the reactance is zero) over one period. 25 in this case. e. capacitive. e. inductive. 2: Input impedance of a low-loss transmission line. A 75 resistor is now connected to a good transmission line with characteristic impedance of 50 . 2 Np/m at 1 GHz. Plot the input impedance as a function of the line length (up to 2λ). 5. Solution: For a low-loss transmission line, the characteristic impedance is still a constant (= 50 in this case). The line length changes from 0 to 2λ.

More discussion will be given in Chapter 3. 14. Using these equations, we can obtain a number of useful results. 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 .

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. 42) This can be used to calculate the reflection coefficient once the VSWR is known.

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