Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2010-08-20
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
8 pages, 15 figures, submitted to MTT Transactions
Scientific paper
A design methodology and synthesis equations are described for lumped-element filter prototypes having low-pass, high-pass, band-pass, or band-stop characteristics with theoretically perfect input- and output-match at all frequencies. Such filters are a useful building block in a wide variety of systems in which the highly reactive out-of-band termination presented by a conventional filter is undesirable. The filter topology is first derived from basic principles. Then the relative merits of several implementations and tunings are compared via simulation. Finally, measured data on low-pass and band-pass filter examples are presented which illustrate the practical advantages as well as showing excellent agreement between measurement and theory.
Boyd Tod A.
Morgan Matthew A.
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