Cascaded dual band coupled‐fed microstrip open‐loop filter

A dual-band microstrip open-loop filter on a single substrate is proposed. The filter can be designed by using the traditional design procedure of a single-band filter and the specifications of the two bands can be easily met. In addition, the structure is suitable for a cascaded filter in order to improve the frequency response. The good agreement between the numerical and measured results validates the proposed structure. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 519–522, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20867

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