Compact Substrate Integrated Waveguide Tunable Filter Based on Ferroelectric Ceramics


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This letter presents the design and the realization of a compact tunable filter integrated in ferroelectric ceramic sub- strate. The bandpass filter bases on an evanescent-mode dielectric cavity,whichisloadedbyapairoftunablemushroom-typecomple- mentary split-ring resonators. Tunable impedance matching net- worksareadditionallyimplementedtoimprovepassbandinsertion loss across the tuning range. A prototype has been realized in a 12.5 mm 9.5 mm 0.8 mm planar module. Measurements con- firm a frequency coverage from 2.95 to 3.57 GHz, a 3 dB fractional bandwidth below 5.4%, with an insertion loss between 3.3 dB and 2.6 dB. Index Terms—Barium strontium titanate (BST), comple- mentary split-ring resonator (CSRR), ferroelectric, substrate integrated waveguide (SIW), tunable filter.

Journal: IEEE Microwave and Wireless Components Letters - IEEE MICROW WIREL COMPON LETT , vol. 21, no. 9, pp. 477-479, 2011

DOI: 10.1109/LMWC.2011.2162615

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References (7)

Modeling and Applications of Ferroelectric-Thick Film Devices With Resistive Electrodes for Linearity Improvement and Tuning-Voltage Reduction (Citations: 11)

Tunable microwave filters based on ferroelectric capacitors (Citations: 5)

Back-to-back tunable ferroelectric resonator filters on flexible organic substrates (Citations: 2)

BandPass Tunable Ferroelectric Filter Based on Uniplanar Dielectric Resonators (Citations: 1)

Substrate Integrated Waveguide Loaded by Complementary Split-Ring Resonators and Its Applications to Miniaturized Waveguide Filters (Citations: 10)


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