Design of a Dual-Band Bandpass Filter Using a Cross Ring Resonator

Zhao, Fuqing; Weng, Min‐Hang; Tsai, Chung‐Ying; Lin, Cheng-Xun; Yang, and Ru-Yuan

doi:10.2528/pierl19041507

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…Compared with Reference 5, in bandwidth, insertion loss, transmission zero, spurious suppression, flexibility and other indicators are much better than 5 although the size of the filter in this article is slightly larger. Compared with Reference 6, other indicators are better although the size is slightly larger. Compared with Reference 7, the filter in this article achieves a larger bandwidth and higher spurious suppression at a smaller size.…”

Section: Measurement and Resultsmentioning

confidence: 71%

“…Not only that, many literatures have also proposed many different methods to implement dual‐passband. For example, in literature, 4 a dual‐band filter is implemented by paralleling two resonators with different pass bands, and in literature, 5‐6 a dual‐passband filter is realized by the coupling of two dual‐mode resonance rings. Among them, some literatures mentioned some methods that can independently adjust the frequency of each passband.…”

Section: Introductionmentioning

confidence: 99%

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Dual‐band filter with high selectivity and wide stopband rejection

Shi

Zhao

Zhang

2020

Int J RF Microw Comput Aided Eng

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This article presents a highly selective dual-passband filter based on steppedimpedance-resonator (SIR) and mixed electromagnetic coupling. First, the surface area of the filter is effectively reduced by the triangular topology. Second, four controllable transmission zeros are introduced by source-load coupling feed and mixed electromagnetic, which increases the selectivity of the filter. Third, a perturbation structure is added to independently control the resonance points of each passband. Finally, the improved defect ground structure (DGS) is integrated to obtain wide stopband rejection. The measured S-parameters are well agreement with the simulated results, which show that the center frequencies of the two passbands are 2.4 GHz and 5.2 GHz; and the passband insertion losses are 0.85 dB and 1.6 dB; and the relative bandwidths are 14.6% and 5.7%, respectively. Besides, the structure is with six transmission zeros, and 20 dB suppression for the third harmonic and the fourth harmonic are achieved. Compared with the traditional SIR double-passband filter, this filter has many advantages, such as simple design, small size, small insertion loss, controllable frequency, high selectivity, and high spurious suppression.

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Section: Measurement and Resultsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Dual‐band filter with high selectivity and wide stopband rejection

Shi

Zhao

Zhang

2020

Int J RF Microw Comput Aided Eng

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“…Sun 9 has already proposed dual‐band dual‐mode BPFs using ring resonators with good specifications. The same idea has later been utilized to implement the other forms of DB‐BPFs such as cross ring resonator, split ring resonator, and split‐loop resonator loaded rectangular by an open‐circuited stub 10‐13 . DB‐BPFs based on coupled line resonators have been reported with the advantages of simple design and sharp roll‐off 14,15 .…”

Section: Introductionmentioning

confidence: 99%

“…The same idea has later been utilized to implement the other forms of DB-BPFs such as cross ring resonator, split ring resonator, and split-loop resonator loaded rectangular by an open-circuited stub. [10][11][12][13] DB-BPFs based on coupled line resonators have been reported with the advantages of simple design and sharp roll-off. 14,15 The defected ground structure (DGS) [16][17][18] and defected microstrip structure (DMS) 19,20 have been used to obtain DB-BPFs with high performance.…”

Section: Introductionmentioning

confidence: 99%

A new compact microstrip dual bandpass filter using stepped impedance and λ /2 bended resonators

Moattari

Bijari

Razavi

2021

Int J RF Mic Comp-Aid Eng

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In this paper, a compact dual‐band bandpass filter (DB‐BPF) is implemented by using a pair of coupled stepped impedance resonators (SIRs) and a pair of λ/2 bended resonators for the modern wireless communication systems such as WiMAX and WLAN (3.4 and 5.4‐GHz). The physical layout is presented and explained the establishment of an LC equivalent circuit. Moreover, the second passband of the proposed dual‐band bandpass filter can be independently controlled by inserting the open‐circuited stubs at the end of the λ/2 bended resonators without increasing the circuit size. Simulation results show that the second passband can be ranged from 5.6 to 4.8‐GHz with the bandwidth of 400 ± 96‐MHz, whereas the first passband is fixed with the bandwidth of 280 ± 8.5‐MHz. The measured results exhibit the insertion losses (S21) lower than 1.2 and 1.4 dB, and the return losses (S11) of −23 and −32 dB at the first and second passbands, respectively, which show a good agreement with simulation results. The dual‐band microstrip filter is fabricated on RT/Rogers 4003 substrate with a compact size of 0.24λg × 0.25λg.

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Design and development of metamaterial bandpass filter for WLAN applications using circular split ring resonator

Revathi¹,

Robinson²

2021

Frequenz

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In this paper, a metamaterial bandpass filter using Split Ring Resonators (SRR) is designed, analyzed, and developed for WLAN applications at 2.4 GHz frequency band. Here, metamaterial bandpass filters with and without Defected Ground Structure (DGS) are designed, analyzed and compared. The filter structure shows a considerable size reduction with 50% fractional bandwidth, quality factor of 2 and wide bandwidth. The simulation results of the proposed filters offered good insertion loss and return loss response. The filters have been modeled, fabricated and their performance has been evaluated using the Method Of Moment (MOM) based electromagnetic simulator IE3D. The dimensions of the proposed filter is 20 × 9 × 1.6 mm which is considerably reduced. The simulated and measured results projected that the proposed metamaterial filters are well suited for WLAN applications.

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Design of a Dual-Band Bandpass Filter Using a Cross Ring Resonator

Cited by 3 publications

References 7 publications

Dual‐band filter with high selectivity and wide stopband rejection

Dual‐band filter with high selectivity and wide stopband rejection

A new compact microstrip dual bandpass filter using stepped impedance and λ /2 bended resonators

Design and development of metamaterial bandpass filter for WLAN applications using circular split ring resonator

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