ETRI Journal
- Volume 29 Issue 5
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- Pages.614-618
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- 2007
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- 1225-6463(pISSN)
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- 2233-7326(eISSN)
Miniaturized Bandstop Filter Using Meander Spurline and Capacitively Loaded Stubs
- Liu, Haiwen (High-Frequency Technology Group, Kiel University) ;
- Knoechel, Reinhard H. (High-frequency Technology Group, Kiel University) ;
- Schuenemann, Klaus F. (Institute of High-Frequency, Technology University Hamburg-Harburg)
- Received : 2007.03.17
- Published : 2007.10.31
Abstract
A miniaturized bandstop filter (BSF) is introduced in this paper. The filter consists of one meander spurline and a pair of capacitively loaded stubs. The meander spurline with low resonant frequency and improved slow-wave factor exhibits excellent resonant bandgap characteristics which can be modeled by a longitudinally coupled resonator. The design of the proposed microstrip BSF is presented, and its performance is measured. Measurements show that there is a stopband from 2.3 to 5.6 GHz with