Introduction to Computer Methods for Microwave Circuit by Janusz A. Dobrowolski

By Janusz A. Dobrowolski

Discusses concept and layout of pulsed Doppler radar and MTI with info on litter, muddle modelling and conception of optimal processing, and covers issues relating to the appliance of precise Doppler sign processing thoughts that supply targeted good points inside a radar procedure.

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46 In conclusion, converting to Z- and Y-parameters to form chain parameters is accomplished using these formulas: 34 SMALL SIGNAL MICROWAVE AMPLIFIER DESIGN A Ay Z = C ~C 1 D _C C . 48 where AT = AD - BC. 5 Summary We have provided an introduction to Z-, Y-, and chain parameters. Their usage in the analysis and design of filters, impedance-matching networks, and RF circuits is discussed in detail in two excellent texts listed in the reference section at the end of this chapter. Understanding Z-, Y-, and chain parameters is paramount to comprehending concepts covered in the remainder of this book.

Leo Young, and E. M. T. Jones. Microwave Filters, Impedance-Matching Networks, and Coupling Structures. New York: McGraw-Hill, 1964. 2. Temes, G. C. and J. W LaPatra. Circuit Synthesis and Design. New York: McGraw-Hill, 1977. 1 T Introduction his chapter describes circuit parameters that are based on power flow. The open-circuit Z-parameters and the short-circuit Y-parameters are used in many of the circuit computer-aided design (CAD) programs. We can calculate the network parameters of circuits made from well-known components such as resistors, capacitors, and inductors.

A more interesting and more common source of these two waves is the use of one source, or generator, and a circuit element that causes a mismatch on the transmission line. Consider the case where a transmission line is leading to a circuit element ZL, as shown in Figure 3-4. The voltage and current at this termination, or load, is related by Ohm's law. 29 z0 Figure 3-4 Transmission line with a characteristic impedance of Zo terminated with a load impedance ofZL. 30 for Vf and Vr, the reflection coefficient in terms of the characteristic impedance of the transmission line (Zo) and the load impedance (ZL) can be found to be ZL-ZO 331 At other points along the transmission line the voltage and current of the waves are different.

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