Journal ArticleDOI
Single- and Dual-Band Bandpass Filters Using Coupled Stepped-Impedance Resonators With Embedded Coupled-Lines
He Zhu,Amin Abbosh +1 more
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TLDR
In this paper, a pair of coupled stepped-impedance resonators and its use to build single and dual-band bandpass filter (BPF) is presented, where the adopted resonators are coupled at the two open-ended edges.Abstract:
A pair of coupled stepped-impedance resonators and its use to build single- and dual-band bandpass filter (BPF) is presented. To that end, two symmetrical stepped-impedance resonators with two embedded coupled-line sections are used. The adopted resonators are coupled at the two open-ended edges. The first even-mode resonant mode can be suppressed or excited based on whether it is required to realize a single- or dual-band response. Sharp passband selectivity and stopband harmonic suppression are achieved due to the existence of multiple transmission zeros. For verification, single- and dual-band filters using the proposed resonator are designed, fabricated and tested. The experimental results show a passband of 2.34–2.62 GHz (centered at 2.45 GHz for WLAN system), less than 1.5 dB insertion loss for the single-band filter; the dual-band design has two passbands ranged from 2.28–2.67 GHz and 3.35–3.63 GHz with less than 1.2 dB insertion loss for WLAN and WiMAX systems.read more
Citations
More filters
Journal ArticleDOI
A Simple Planar Dual-Band Bandpass Filter With Multiple Transmission Poles and Zeros
TL;DR: The analytical (closed-form) extraction process for the transmission poles and zeros of the proposed dual-band BPF is presented based on the rigorous scattering-parameters theory and the even- and odd-mode analysis method.
Journal ArticleDOI
Codesign of High-Efficiency Power Amplifier and Ring-Resonator Filter Based on a Series of Continuous Modes and Even–Odd-Mode Analysis
TL;DR: In this paper, a method enabling the codesign of a high-efficiency power amplifier (PA) and a ring-resonator microstrip bandpass filter is proposed to realize broadband or multiband impedance matching as well as the suppression of undesired signals.
Journal ArticleDOI
A Compact C-Band Bandpass Filter with an Adjustable Dual-Band Suitable for Satellite Communication Systems
Ali Lalbakhsh,Amirhossein Ghaderi,Wahab Mohyuddin,Roy B. V. B. Simorangkir,Nima Bayat-Makou,Muhammad Sajjad Ahmad,Gwan Hui Lee,Kang Wook Kim +7 more
TL;DR: In this paper, a narrowband dual-band bandpass filter with independently tunable passbands is presented through a systematic design approach and a size-efficient coupling system is proposed with the capability of being integrated with additional resonators without increasing the size of the circuit.
Journal ArticleDOI
A Compact Dual-Wideband Bandpass Filter Based on Open-/Short-Circuited Stubs
Gen-Zhu Liang,Fu-Chang Chen +1 more
TL;DR: A dual-wideband bandpass filter is proposed and analyzed, which is based on loaded open-/short-circuited stubs, and shows a low insertion loss, wide bandwidth and easy for fabrication.
Journal ArticleDOI
Dual-Band and Tri-Band Balanced-to-Single Ended Power Dividers With Wideband Common-Mode Suppression
He Zhu,Y. Jay Guo +1 more
TL;DR: A new design approach of developing multi-band balanced-to-single-ended (BTSE) power dividers with arbitrary number of bands and controllable bandwidth is presented, based on flexible coupling schemes.
References
More filters
Journal ArticleDOI
Compact dual-band microstrip bandpass filter without external feeds
Sheng Sun,Lei Zhu +1 more
TL;DR: In this article, a dual-band microstrip bandpass filter is proposed and designed to operate at 2.4 and 5.2 GHz without needing any external impedance-matching block, and the modified halfwavelength stepped-impedance resonator with sinuous configuration is constructed to simultaneously excite the dual resonances at these two specified frequencies with miniaturized overall size.
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
Synthesis Design of Dual-Band Bandpass Filters With $\lambda/4$ Stepped-Impedance Resonators
Songbai Zhang,Lei Zhu +1 more
TL;DR: A fourth-order dual-band filter is designed using the proposed synthesis method to demonstrate improved dual-passband performance with sharpened out-of-band rejection skirts and high in-between-band isolation.
Journal ArticleDOI
A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator
TL;DR: 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.
Journal ArticleDOI
Harmonic-Suppressed Bandpass Filter Based on Discriminating Coupling
Xiu Yin Zhang,Quan Xue +1 more
TL;DR: In this paper, a novel method to suppress harmonic responses of parallel-coupled bandpass filters is proposed, where the coupling coefficient at fundamental resonant frequency can be tuned to desirable values whereas it is zero at the second harmonic.