Antennas. From theory to practice by Yi Huang PDF

By Yi Huang

ISBN-10: 0470510285

ISBN-13: 9780470510285

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

Antennas: from idea to Practice discusses the fundamentals of contemporary antenna layout and concept. constructed particularly for engineers and architects who paintings with radio communications, radar and RF engineering, this publication deals useful and hands-on therapy of antenna concept and methods, and offers its readers the talents 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 typical layout software program instruments, and antenna dimension apparatus, 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 by means of authors who're specialists in antenna layout, with event from either academia and industry

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

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Extra info for Antennas. From theory to practice

Sample text

It is most frequently used at, or within, the unity radius region. However, the remainder is still mathematically relevant, being used, for example, in oscillator design and stability analysis. 11. The horizontal axis is the real part of the reflection coefficient while the vertical axis shows the imaginary part of the reflection coefficient. 11 The Smith Chart showing the complex reflection coefficient | | = 0 (VSWR = 1). In the standard Smith Chart, only the circle for | | = 1 (VSWR = ∞) is shown and other circles are not displayed to make the chart simple and neat.

Normally, the higher the frequency, the larger R and G. Thus, this condition does not mean high frequency. It applies for any frequency when this condition is met. 22) Thus, it is the same as the lossless case. The characteristic impedance is a pure resistance and is determined by L and C; it is not a function of the frequency. This is why the characteristic impedance of industrial standard transmissions has a constant value, normally 50 or 75 ohms, over a large frequency band, even when the line loss is not zero.

It has been widely used for electrical power supply and also for radio and television systems. In the old days, the broadcasting TV signal was received by an antenna and then passed down to a TV via such a two-wire conducting wire, which has now been replaced by the coaxial cable. This is partially due to the fact that the antenna used now (the Yagi–Uda antenna, a popular TV antenna to be discussed in Chapter 5, which has an input impedance around 75 ohms) is different from the antenna used then (the folded dipole, which was a popular TV antenna many years ago and had an input impedance around 300 ohms).

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Antennas. From theory to practice by Yi Huang


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