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Título:	Characterizing a Tune-all bandstop filter
Autor/a:	Musoll, Carles; Llamas Garro, Ignacio; Brito Brito, Zabdiel; Pradell i Cara, Lluís; Corona, Alfonso
Otros autores:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones
Abstract:	In this paper a reconfigurable bandstop filter able to reconfigure central frequency, bandwidth and selectivity for fine tuning applications is presented. The reconfigurable filter topology has four poles and a quasielliptic bandstop filter response. The filter is tuned by varactor diodes placed at different locations on the filter topology. The varactors are voltage controlled in pairs due to filter symmetry for central frequency and bandwidth control. An additional varactor is placed on a crossing line to move a pair of transmission zeros, closer or farther to the filter central frequency, which tunes filter selectivity. The filter has a tuneable fractional bandwidth range from 11.51 to 15.46%, a tuneable central frequency range from 1.346 to 1.420 GHz and a selectivity tuning range from 0.37 to 0.40 dB/MHz.
Materia(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Varactors -Signal theory (Telecommunication) -Senyal, Teoria del (Telecomunicació)
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Tipo de documento:	Artículo - Versión publicada Objeto de conferencia
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