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Coplanar MMIC active bandpass filters using negative resistance circuits

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3 Author(s)
Hopf, B.P. ; Inst. fuer Mobil- und Satellitenfunktech., Kamp-Lintfort, Germany ; Wolff, I. ; Guglielmi, M.

Several active bandpass filters for 1.8 and 5.5 GHz have been developed with the coplanar line technique using negative resistance circuits. For example, a first-order active bandpass filter at 5.5 GHz and two second-order bandpass filters at 1.8 GHz are presented, where one of the 1.8 GHz filters is a fixed center frequency filter and the other a tunable one. These 1.8 GHz filters have a 3 dB bandwidth of 110 MHz. The tuning range of the center frequency is 200 MHz

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:42 ,  Issue: 12 )

Date of Publication:

Dec 1994

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