Journal ArticleDOI
A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator
TLDR
In this paper, a dual-mode dual-band bandpass filter with two transmission poles in both passbands using a single ring resonator is proposed, where two excited ports are placed at the 135deg -separated positions along the ring resonators and coupled with the ring via parallel-coupled lines, leading to synchronous excitation of two transmission pole in dual passbands.Abstract:
A dual-mode dual-band bandpass filter with two transmission poles in both passbands using a single ring resonator is proposed. Two excited ports are placed at the 135deg -separated positions along the ring resonator and coupled with the ring via parallel-coupled lines, leading to synchronous excitation of two transmission poles in dual passbands. After the principle of this initial filter is described, an improved ring resonator with periodic loading of open-circuited stubs is constructed and studied to achieve compact size and adjustable spacing between the two passbands. Finally, a dual-band ring resonator filter with center frequencies at 2.4 and 5.8 GHz is designed and fabricated. Measured results verify the design principle.read more
Citations
More filters
Journal ArticleDOI
A Dual-Band Ring-Resonator Bandpass Filter Based on Two Pairs of Degenerate Modes
TL;DR: In this article, a dual-band ring-resonator bandpass filter with two transmission poles in both passbands is proposed, where two capacitors or parallel-coupled lines are placed at two nonorthogonally excited positions along a ring resonator in order to excite the two first-order degenerate modes and create multiple transmission zeros.
Journal ArticleDOI
Compact Dual-Mode Triple-Band Bandpass Filters Using Three Pairs of Degenerate Modes in a Ring Resonator
TL;DR: In this paper, a triple-band bandpass filter with two transmission poles in each passband is proposed using three pairs of degenerate modes in a ring resonator, where four open-circuited stubs are attached symmetrically along the ring and they are treated as perturbation elements to split the two second-order degenerate mode, resulting in a two-pole second passband.
Journal ArticleDOI
A Dual-Band Bandpass Filter Using a Single Dual-Mode Ring Resonator
TL;DR: In this article, a simple microstrip ring-resonator is presented for novel design of dual-band dual-mode bandpass filters with good isolation and upper-stopband performance.
Journal ArticleDOI
Dual-Mode Dual-Band Bandpass Filter Based on a Stub-Loaded Patch Resonator
Yuan Chun Li,Hang Wong,Quan Xue +2 more
TL;DR: In this article, a dual-mode dual-band bandpass filter using a patch resonator with a cross slot and two different groups of stubs loaded is presented, which can modify the filter's input impedance at different frequencies and control the even and odd modes in the passbands, respectively.
Journal ArticleDOI
Design of Balanced Dual-Band Bandpass Filters Using Asymmetrical Coupled Lines
Young-Ho Cho,Sang-Won Yun +1 more
TL;DR: In this article, balanced dual-band bandpass filters (BPFs) using asymmetrical coupled lines were proposed and tested at center frequencies of 2.4 and 3.57 GHz.
References
More filters
Journal ArticleDOI
Microstrip bandpass filter using degenerate modes of a microstrip ring resonator
TL;DR: In this article, two degenerate modes can be excited on a microstrip ring resonator to realize a double-tuned circuit bandpass filter in microstrip technique, which can be used to achieve a better performance than the conventional bandpass filters.
Book
Microwave Ring Circuits and Related Structures
Kai Chang,Lung-Hwa Hsieh +1 more
TL;DR: In this article, the authors present an analysis and model of ring resonance circuits and their application in the context of filter and filter applications, as well as a comparison of the two types of resonance circuits.
Journal ArticleDOI
Dual-Mode Dual-Band Bandpass Filter Using Stacked-Loop Structure
TL;DR: In this article, a dual-mode dual-band bandpass filter using stacked-loop structure is proposed, which allows two transmission paths to radio frequency (RF) signals, each of them using dualmode resonators results in respective passband.
Journal ArticleDOI
Novel Dual-Mode Dual-Band Filters Using Coplanar-Waveguide-Fed Ring Resonators
Xiu Yin Zhang,Quan Xue +1 more
TL;DR: In this article, two microstrip perturbed ring resonators are employed to obtain dual-mode dual-band responses, and two kinds of filter configurations with compact size are proposed to satisfy various requirements of external qualify factors and coupling coefficients at both passbands.
Journal ArticleDOI
A novel compact ring dual-mode filter with adjustable second-passband for dual-band applications
TL;DR: In this article, a ring resonator with two different geometric dimensions is derived and designed to have identical fundamental and the first higher-order resonant frequencies, and the proposed filter has smaller size as compared with the basic topology of stopband filters and stepped-impedance-resonator (SIR) filters.
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Novel Dual-Mode Dual-Band Filters Using Coplanar-Waveguide-Fed Ring Resonators
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