George L. Matthaei

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A survey of the major techniques used in the design of microwave filters is presented in this paper. It is shown that the basis for much fundamental microwave filter theory lies in the realm of lumped-element filters, which indeed are actually used directly for many applications at microwave frequencies as high as 18 GHz. Many types of microwave filters are(More)
A simplified, approximate means for computing the distributed capacitance and inductance matrices for TEM-mode (or quasi-TEM-mode) single or multiple transmission lines is presented. Cases having multiple dielectrics and/or ground planes are included. The conductors used may be either rectangular or planar. Simplicity is achieved by use of the “method of(More)
Absfract—Impedance transforming networks are described which consist of short lengths of relatively high impedance transmission line alternating with short lengths of relatively low impedance line. The sections of transmission line are all exactly the same length (except for corrections for fringing capacitances), and the lengths of the line sections are(More)
This paper presents a new concept of a wide band RF amplifier using scattering parameters that is often used in the radio frequency communication system. This amplifier operates from 80MHz to 1. 1GHz frequency and it is based on BFG65 NPN transistor that has a high transition frequency of 7. 5GHz [1]. The simulation results show good performances. The power(More)
1. R. Garg, P. Bhartia, I. Bahl, and A. Ittipibon, Microstrip Antenna Design Handbook, Artech House, Boston London, 2001. 2. D. Morgan and R. Ragland, “Lumped element filters for electronic warfare systems,” Microwave J., vol. 29, pp. 127–136, Feb. 1986. 3. R. Levy, “Design considerations for lumped-element microwave filters,” Microwave J., vol. 31, pp.(More)
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