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Novel compact UWB bandpass filter with notched band

✍ Scribed by Li Qi; Liang Chang-Hong; Zhang Wei; Xu Wei-Feng

Book ID
102949490
Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
586 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A compact planar microstrip ultra‐wideband (UWB) bandpass filter (BPF) with notched band has been proposed and implemented in this letter for the use in UWB wireless communication applications set by Federal Communications Commission (FCC). Three coupled lines and quarter‐wave short‐circuited shunt stubs are used to realize a high selectivity filtering characteristic. By employing embedding open stubs, the narrow notched band was introduced to reject the undesired wireless local‐area network (WLAN) radio signals. The bandwidth of the notched filter can be controlled by adjusting the width or length of the slot. The proposed component has been designed, simulated, and fabricated for verification. Simulation results are confirmed via experiment, showing good wideband filtering performance with notched band. The measured insertion loss is less than 1.2 dB, the return loss is more than 18 dB, and the variation of group delay is lessthan 0.4 ns throughout the passband except for the notched band. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 280–283, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24934

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