Abstract
AbstractHi‐Lo microstrip low‐pass filters using Koch fractal shapes are proposed for the first time. By constructing the low‐impedance sections in Koch‐shaped geometry, the passband performance of the Hi‐Lo microstrip low‐pass filter enhanced greatly. The excellent passband performance is mainly due to the gradual changes of the steps of the fractal‐shaped microstripline, thus to provide weak current discontinuities. To verify the proposed method, low‐pass filter prototypes of different iteration orders are designed, fabricated, and measured, and the measurement results show that the maximal sidelobe level of the passband return loss is reduced from −17.8 to −28.6 dB, and the other performances are not changed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2577–2579, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22774
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
