By Christopher Coleman

ISBN-10: 0521834813

ISBN-13: 9780521834810

As an undergraduate scholar taking an top point instant circuits path, this publication was once necessary and seriously upset either the category and the trainer. whereas the e-book introduces numerous themes proper to RF engineering, it is going nowhere in constructing important principles and supplying sufficient motives for equations. The logical movement is damaged during the textual content, and it'll basically make feel to an individual already accepted to RF engineering. To any engineering scholars accustomed to skinny texts masking expansive material, and delivering no concrete perception, this e-book suits completely into that type. the single part that constructed a bit greater than the others involved a overview of resonant circuits, even if, different texts can be found that provide far better assurance.

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Extra resources for An Introduction to Radio Frequency Engineering

Example text

9) where vi (jω) and vo (jω) are the input and output voltages, respectively. 10) where Q = 1/ω0 RC = ω0 L/R = 1/2ζ . The maximum of vo will occur at the resonant √ frequency ωo (= 1/ LC) with the response falling away either side of this frequency. Essentially, the circuit behaves as a filter with centre frequency at ω0 . 3 ω Behaviour of transfer function around resonance. 3). 12) 2Q for the 3 dB (half power) frequencies ω3 dB . In other words, the quality factor Q is related to the 3 dB bandwidth B of the circuit through B = ω0 /Q.

1998. Radar Principles. New York: John Wiley. Popovic, Z. and Popovic, B. D. 2000. Introductory Electromagnetics. Upper Saddle River, NJ: Prentice-Hall. Pozar, D. M. 2001. Microwave and RF Design of Wireless Systems. New York: John Wiley. Proakis, J. G. and Salehi, M. 1994. Communication Systems Engineering. Englewood Cliffs, NJ: Prentice-Hall. Rhode, U. , Whitaker, J. and Bucher, T. T. N. 1996. Communication Receivers (2nd edn). New York: McGraw-Hill. Smith, A. A. 1998. Radio Frequency Principles and Applications.

Where n = (L 1 /L 2 )1/2 is the winding ratio (note that inductance is proportional to the square of the number of turns in the winding). Furthermore, an impedance Z 2 at terminal 2 is transformed through the transformer to an impedance Z 1 = n 2 Z 2 at terminal 1. ) In practice, there is no such thing as an ideal transformer and the deviation from the ideal is measured in terms of the size of s L 1 and the coupling coefficient k= M 1 (L 1 L 2 ) 2 . 26) . 9. If broadband operation is required, it is clear that the inductance L 1 should be as large as possible and the coupling tight (k ≈ 1).

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