2023-03-28
Reconfigurable Bandstop Filter with Switchable CLLs
for Bandwidth Control
By
Moheddine Smari,
Dr. Moheddine Smari
University of Carthage
Tunisia
Homepage
Saber Dakhli,
Dr. Saber Dakhli
SUPCOM
University of Carthage
Tunisia
Homepage
Erwan Fourn,
Dr. Erwan Fourn
Univ. Rennes, INSA Rennes, CNRS
France
Homepage
Progress In Electromagnetics Research Letters, Vol. 110, 11-19, 2023
Abstract
In this paper, a compact reconfigurable bandstop filter suitable for multistandard and multiband mobile terminals is reported. The proposed dual bandstop filter consists of a microstrip line coupled to two switchable Capacitively Loaded Loops (CLLs). We achieve tuning of individual notched frequency bands by using open circuits as switches and incorporated in each CLL element. The performance characteristics in terms of S-parameters and surface currents distribution show that the proposed filter is able to adjust two stopbands independently in a wide tuning range. A corresponding prototype of tunable dual-stopband filter is manufactured, and practical measurement agree well with the simulation results.
