Reconfigurable coplanar waveguide (CPW) and half-mode substrate integrated waveguide (HMSIW) band-stop filters using a varactor-loaded metamaterial-inspired open resonator
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AuthorHinojosa Jiménez, Juan; Saura Ródenas, Adrián; Álvarez Melcón, Alejandro; Martínez Viviente, Félix Lorenzo
SponsorsThis work was supported by Ministerio de Economía y Competitividad, Fundación Séneca (Murcia) of Spain and European Regional Development Funds under grants TEC2016-75934-C04-4-R, 19494/PI/14 and 20147/EE/17.
Bibliographic CitationHinojosa, J.; Saura-Ródenas, A.; Alvarez-Melcon, A.; Martínez-Viviente, F.L. Reconfigurable Coplanar Waveguide (CPW) and Half-Mode Substrate Integrated Waveguide (HMSIW) Band-Stop Filters Using a Varactor-Loaded Metamaterial-Inspired Open Resonator. Materials 2018, 11, 39. https://doi.org/10.3390/ma11010039
KeywordsCoplanar waveguide (CPW)
Substrate integrated waveguide (SIW)
An open ring resonator (ORR) loaded with a varactor diode is designed and implemented in order to achieve high-performance tunable band-stop filters in planar technology with a compact size. This varactor-loaded ORR (VLORR) is versatile. It allows a shunt connection with different planar waveguide sections. In this paper, it has been connected to a coplanar waveguide (CPW) and a half-mode substrate integrated waveguide (HMSIW). As a reverse bias voltage is applied to the VLORR, a continuous tuning over the resulting stop-band can be achieved. To illustrate the possibilities of the VLORR, three prototypes have been designed, fabricated, and characterized. The three prototypes show an outstanding performance, with a rejection level at the resonant frequency and a tuning range greater than 12 dB and 85%, respectively. This VLORR has high potential value in microwave communication systems to eliminate unwanted signals.
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