Topic
Butterworth filter
About: Butterworth filter is a research topic. Over the lifetime, 6187 publications have been published within this topic receiving 69070 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a design methodology and equations are described for lumped-element filter prototypes having lowpass, high-pass, bandpass, or bandstop characteristics with theoretically perfect input-and output-match at all frequencies.
Abstract: A design methodology and equations are described for lumped-element filter prototypes having low-pass, high-pass, bandpass, or bandstop 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. The relative merits of several implementations and tunings are then compared via simulation. Finally, measured data on low-pass and bandpass filter examples are presented, which illustrate the practical advantages, as well as showing excellent agreement between measurement and theory.
137 citations
Book•
30 Jun 2001
TL;DR: In this paper, the authors present an approximate design and analysis of an analog filter and its implementation and analysis, as well as an implementation of the approximate design method and its analysis. Butterworth and Chebyshev type I and II filters are discussed.
Abstract: Preface. 1. Introduction. Part I: Approximation Design and Analysis. 2. Analog Filter Design and Analysis Concepts. 3. Butterworth Filters. 4. Chebyshev Type I Filters. 5. Chebyshev Type II Filters. 6. Elliptic Filters. 7. Bessel Filters. 8. Other Filters. 9. Frequency Transformations. Part II: Implementation and Analysis. 10. Passive Filters. 11. Active Filters. Appendices. References. Index.
136 citations
06 Jun 2004
TL;DR: In this paper, a ring filter is made to control the attenuation pole frequency by adjusting both the ring and the stub impedance, and the circuit conditions of two attenuation poles at either side of the passband are given together with controlling them.
Abstract: To realize an ultra wideband (UWB) bandpass filter (BPF) in wireless communications, a device is developed using a new ring filter. The ring filter is compact, with low insertion loss, sharp rejection and a constant group delay within the UWB pass band. The ring filter is made to control the attenuation pole frequency by adjusting both the ring and the stub impedance. A center frequency and a bandwidth of the 5-stage UWB BPF are designed based on the transmission line model. The circuit conditions of two attenuation poles at either side of the passband are given together with controlling them.
135 citations
TL;DR: In this article, a modified parallel-coupled microstrip line filter structure is presented, which improves the filter upper stopband rejection by at least 15 dB and the filter response symmetry is also improved.
Abstract: A modified parallel-coupled microstrip line filter structure is presented. Using this new structure improves the filter upper stopband rejection by at least 15 dB, and the filter response symmetry is also improved. Compared with the traditional parallel-coupled filter, the modified filter used less space and is easy to lay out owing to its inline structure. Several examples show the performance improvement of the filters fabricated in both low-dielectric-constant (2.55) and high-dielectric-constant (10.2) substrates. >
132 citations
TL;DR: The high stopband attenuation and fast sidelobe fall-off rate make the proposed filters suitable candidates for high-speed data communication applications employing multicarrier modulation.
Abstract: A simple method for the design of the finite-impulse-response prototype filter for maximally decimated overlapped complex-modulated transmultiplexers with near perfect reconstruction property is presented. The procedure is unified for all values of overlap factor and leads to a prototype filter with excellent frequency selectivity and fast sidelobe fall-off rate. The high stopband attenuation and fast sidelobe fall-off rate, which is justified analytically, make the proposed filters suitable candidates for high-speed data communication applications employing multicarrier modulation.
132 citations