Wideband bandpass filter with extremely wide upper stopband
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Date
Authors
Malherbe, J.A.G., 1940-
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers
Abstract
The realization of planar wideband bandpass filters with an extremely wide upper stopband is described. The filter design differs from conventional approaches in which it is based on the choice of a wideband bandstop (BS) filter, to which a number of shunt-shorted stubs are connected at specific nodes; the stubs provide transmission zeros at the origin. Two examples of wideband bandpass filters with extremely wide upper stopbands are presented: filters based on a fifth-order Chebyshev wideband BS filter and a pseudoelliptic function ultra-wideband-BS filter. Relative passbands in excess of 100% are achieved, while the equivalent of at least four harmonic passbands is suppressed.
Description
Keywords
Wide upper stopband, Ultra-wideband (UWB), Bandpass, Chebyshev approximation, Filtering theory, Harmonic analysis, Cutoff frequency, Wideband, Passband, Bandpass filters, Microstrip devices, Chebyshev filters, Bandstop (BS)
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Citation
Malherbe, J.A.G. 2018, 'Wideband bandpass filter with extremely wide upper stopband', IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 6, pp. 2822-2827.