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Tunable Channelized Bandstop Passive Filter Using Reconfigurable Phase Shifter

Raafat Lababidi 1 Maryam Al Shami 1 Marc Le Roy 1, * Denis Le Jeune 1 Khaled Khoder 2 André Pérennec 3
* Corresponding author
1 Lab-STICC_ENSTAB_MOM_DIM
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
3 Lab-STICC_UBO_MOM_DIM
IBNM - Institut Brestois du Numérique et des Mathématiques, Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : A novel tunable channelized two-branches passive bandstop filter using a reconfigurable parallel-coupled-line-based Phase Shifter (PS) is presented. The filter topology uses the signal destructive principle and aims to protect the receiver against an unwanted interference signal received by the antenna. The global filter topology contains two branches, each of which has a different function. The bandpass tunable branch selects the frequency to be rejected while the reconfigurable PS plays the signal invertor role. The simultaneous tunability of both bandpass and PS branches is ensured by using identical varactor diodes and features 550-700 MHz tuning range. In addition of having a constant and relatively high rejection level over all the tuning range and low insertion loss in the passband area, the filter guaranties ultra-low power consumption. Moreover, synthesis equations are proposed and used to illustrate the operating principle, and finally validated by comparing simulations results to measurements.
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Submitted on : Tuesday, September 18, 2018 - 4:42:07 PM
Last modification on : Tuesday, February 25, 2020 - 8:08:14 AM

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Raafat Lababidi, Maryam Al Shami, Marc Le Roy, Denis Le Jeune, Khaled Khoder, et al.. Tunable Channelized Bandstop Passive Filter Using Reconfigurable Phase Shifter. IET Microwaves Antennas and Propagation, Institution of Engineering and Technology, 2018, 13 (5), pp.591-596. ⟨10.1049/iet-map.2018.5430⟩. ⟨hal-01876724⟩

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