Journal ArticleDOI
Design of Miniaturized HTS Dual-Band Bandpass Filters Using Stub-Loaded Meander Line Resonators and Their Applications to Tri-Band Bandpass Filters
Naoto Sekiya,Shunsuke Sugiyama +1 more
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TLDR
In this paper, a miniaturized high-temperature superconducting dual-band bandpass filters (DBPFs) using stub-loaded meander line resonators were designed and analyzed using an electromagnetic simulator and fabricated using an YBa 2 Cu 3 O y thin film on an Al 2 O 3 substrate.Abstract:
We have designed a miniaturized high-temperature superconducting dual-band bandpass filters (DBPFs) using stub-loaded meander line resonators and their applications to tri-band bandpass filters (TBPFs). The DBPF enables independent control of the center frequencies of the first and second bands. The bandwidths of the DBPF can be flexibly adjusted using a capacitance-loaded microstrip line between the resonators. The DBPF was designed and analyzed using an electromagnetic simulator and fabricated using an YBa 2 Cu 3 O y thin film on an Al 2 O 3 substrate. The center frequencies are 3.5 and 5.0 GHz; two bands have 2% bandwidth. The measured frequency responses of the DBPF were in good agreement with the simulated frequency responses. The TBPF was realized by combining the DBPF and a single-band bandpass filter (SBPF) that uses a folded stepped-impedance resonator with common input and output. The DBPF constructs the first and third bands of 3.5 and 5.0 GHz, and the SBPF forms the second band of 4.25 GHz. The frequency responses of the simulated TBPF meet the design parameters.read more
Citations
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Journal ArticleDOI
High-Order Dual-Band Superconducting Bandpass Filter With Controllable Bandwidths and Multitransmission Zeros
TL;DR: In this article, a dual-mode hairpin ring resonator with two controllable resonances is proposed to design high-order dual-band high-temperature superconducting (HTS) bandpass filters.
Journal ArticleDOI
A Flexible High-Selectivity Single-Layer Coplanar Waveguide Bandpass Filter Using Interdigital Spoof Surface Plasmon Polaritons of Bow-Tie Cells
TL;DR: In this article, a flexible high-selectivity single-layer coplanar waveguide (CPW) bandpass filter using interdigital spoof surface plasmon polaritons (SSPP) of bow-tie cells is proposed, simulated, and fabricated.
Journal ArticleDOI
A Novel Tri-Band Superconducting Filter Using Embedded Stub-Loaded Resonators
TL;DR: In this article, a tri-band high temperature superconducting bandpass filter based on the tri-mode resonance of an embedded stub-loaded resonator (ESLR) is analyzed using the even and odd-mode method, demonstrating the emergence of three resonant frequencies and two transmission zeros in the ESLR circuit.
Journal ArticleDOI
Progress on applications of high temperature superconducting microwave filters
Journal ArticleDOI
Design of Dual-Mode Dual-Band Superconducting Filters
TL;DR: In this article, a low-pass to dual-band bandpass frequency transformation is proposed based on lossless lumped-element dual-mode resonator circuits, which makes the design process of dualmode dualband filters similar to that of the single bandpass filter.
References
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Microstrip filters for RF/microwave applications
TL;DR: In this paper, the authors present a general framework for coupling matrix for Coupled Resonator Filters with short-circuited Stubs (UWB) and Cascaded Quadruplet (CQ) filters.
Journal ArticleDOI
Bandpass Filters Using Parallel Coupled Stripline Stepped Impedance Resonators
M. Makimoto,S. Yamashita +1 more
TL;DR: In this paper, approximate design formulas for bandpass filters using parallel coupled stripling stepped impedance resonators (SIR) are derived, taking into account the arbitrary coupling length as well as quarter-wavelength coupling.
Journal ArticleDOI
Dual-Band Bandpass Filters Using Stub-Loaded Resonators
TL;DR: In this paper, a stub-loaded resonator (SLR) was proposed for dual-band bandpass filters with three transmission zeros and four transmission zero on either side of both passbands.
Journal ArticleDOI
Design of Dual- and Triple-Passband Filters Using Alternately Cascaded Multiband Resonators
TL;DR: In this paper, a novel method for designing multiband bandpass filters has been proposed, which adds some extra coupled resonator sections in a single-circuit filter to increase the degrees of freedom in extracting coupling coefficients of a multiband filter.
Journal ArticleDOI
Design of Dual-Band Bandpass Filters Using Stub-Loaded Open-Loop Resonators
TL;DR: In this paper, open-loop resonators loaded by shunt open stubs are proposed to design compact dual-band bandpass filters with improved out-of-band rejection characteristics.