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A novel miniaturised microstrip lowpass filter has been studied. With triangular and high–low impedance resonators symmetrically loaded, the proposed filter has successfully achieved size reduction and performance enhancement simultaneously. A demonstrator filter with 3 dB cutoff frequency at 1.5 GHz has been designed, fabricated and measured. Results show that a roll-off of 257 dB/GHz together with a relative stopband bandwidth of 157.4% can be obtained while achieving a high figure-of-merit of 38747.
References
-
-
1)
-
D.M. Pozar
.
(2005)
Microwave engineering.
-
2)
-
J.-L. Li ,
S.-W. Qu ,
Q. Xue
.
Compact microstrip lowpass filter with sharp roll-off and wide stop-band.
Electron. Lett.
,
2 ,
110 -
111
-
3)
-
M.H. Yang ,
J. Xu
.
Design of compact, broad-stopband lowpass filter using modified stepped impedance hairpin resonators.
Electron. Lett.
,
20 ,
1198 -
1200
-
4)
-
M.K. Mandal ,
P. Mondal ,
S. Sanyal ,
A. Chakrabarty
.
Low insertion-loss, sharp-rejection and compact microstrip lowpass filters.
IEEE Microw. Wirel. Compon. Lett.
,
11 ,
600 -
602
-
5)
-
L. Li ,
Z.-F. Li
.
Compact quasi-elliptic lowpass filter using symmetric rectangular coupled capacitors.
Electron. Lett.
,
2 ,
124 -
125
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2010.0329
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content/journals/10.1049/el.2010.0329
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