New stubless compact low‐pass filter using lumped shunt capacitors and coupled slots

This article introduces an improved performance stubless low-pass filter by using lumped capacitors as shunt capacitances elements.The filter has a cut off frequency of 4 GHz and a wide stopband up to more than 13 GHz with a rejection better than 26 dB. The measured insertion loss of the filter within the passband is less than 0.3 dB. The filter has a length of just 6.5 mm. The experimental results agree well with the predicted ones. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2209–2212, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25434

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