Abstract
AbstractIn this paper, a new notch and bandstop filters are proposed and investigated. A rejection section, based on a thin slotted H‐plane strip, provides a symmetric frequency response with very low insertion loss out of the stopband. The rejection phenomenon is explained by the simultaneous excitation of two eigenoscillations with low and high Q‐factors. The results of numerical design and measurement data are given for a 3% notch filter and a 2% three‐section bandstop one. Such a notch filter is probably the simplest one due to its easy fabrication and has the potential to be incorporated in a waveguide circuit by placing it between the waveguide flanges. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 20–24, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20889
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