Antennas: From Theory to Practice by Yi Huang

By Yi Huang

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

Antennas: from thought to Practice discusses the fundamentals of recent antenna layout and concept. constructed particularly for engineers and architects who paintings with radio communications, radar and RF engineering, this e-book deals sensible and hands-on therapy of antenna conception and methods, 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 strains, radio waves and propagation, and antenna research and design
  • Discusses commercial average 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 varied antennas are provided
  • Written in a realistic 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 finished and sensible advent to the fundamentals of antenna layout. The publication can be used as a textbook for complicated scholars coming into a career during this field.

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Additional resources for Antennas: From Theory to Practice

Sample text

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.

47) Step 2: since Z L and jX1 are in series, the composite load impedance can be obtained as Z L N = Z L + jX1 . 45) to find B and X 2 . 14(b). The design process is very similar to that of the T network. 48) Step 2: since Y L and jB1 are in parallel, the composite load admittance can be obtained as Y L N = Y L + jB1 . 46) to find X and B2 . 8: Impedance matching. A load with an impedance of 10 − j100 is to be matched with a 50 transmission line. Design a matching network and discuss if there are other solutions available.

582π, since the impedance period is π , not 2π ). 8318. Step 2: Move from point B1 to the center O. This can be achieved easily using a stub connected in parallel with the line, thus it is advantageous to work in admittances. 8318. This can be achieved by the following two designs: A. 0325λ; B. 2825λ. The stub length can also be obtained from the Smith Chart. Now let us examine the bandwidth of these two designs. 475 cm for Design B. We can use the input impedance formula: Z in (l) = Z 0 Z L + j Z 0 tan(βl) Z 0 + j Z L tan(βl) and the following two equations: = VSWR = Z L − Z0 Z L + Z0 1+| | 1−| | to obtain the VSWR as a function of the frequency.

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