Novel Compact Quad-Band Bandpass Filter With Controllable Frequencies and Bandwidths

Gao, Li; Zhang, Xiu Yin; Zhao, Xiao-Lan; Zhang, Yao; Xu, Jin-Xu

doi:10.1109/lmwc.2016.2558038

Cited by 35 publications

(34 citation statements)

References 9 publications

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“…Meanwhile, a sext-band BPF [9,10] and a septband BPF [11] are constructed based on more than six resonators with non-ideal size. In order to reduce the number of resonators and insertion loss, multi-mode resonators (MMRs) are widely adopted [12][13][14][15][16][17][18][19][20][21]. One tri-band BPF and one quad-band BPF are implemented by stub loaded SIR with defected microstrip structure for achieving wide stopband [17].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the occupied size is large. In [18], a pair of multi-stub-loaded resonators with four modes is deployed to realise a quad-band BPF with controllable frequencies and bandwidths, but this topology also results in a high insertion loss. In [19], a stepped-impedance open stub-loaded resonator with six modes is employed to obtain three passbands but increases insertion losses.…”

Section: Introductionmentioning

confidence: 99%

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A compact sept‐band bandpass filter utilising a single multi‐mode resonator

Wang

et al. 2019

IET Microwaves, Antennas & Propagation

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This study proposes a compact sept‐band bandpass filter (BPF) with controllable centre frequencies and bandwidths. To achieve compact size and low insertion loss, the filter deploys a single multi‐mode resonator and abandons conventional source–resonator coupling structure to reduce the order of coupling sections. The fabricated BPF demonstrates seven passbands located at 1.0, 1.6, 2.3, 2.8, 3.5, 4.2, and 5 GHz, which are targeted for global system for mobile communications (GSM), wireless local area network, WIFI, and 4G/5G communication. Within the seven passbands, the minimum insertion losses are 0.9, 1.5, 0.5, 1.2, 0.9, 1.9, and 1.6 dB, respectively. The overall size of the fabricated filter is 0.1λg × 0.21λg. This work provides a new approach to obtain the most passbands of BPF while achieving less insertion‐loss and enhanced selectivity simultaneously.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A compact sept‐band bandpass filter utilising a single multi‐mode resonator

Wang

et al. 2019

IET Microwaves, Antennas & Propagation

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“…Multi-band bandpass filter (BPF) with high-selectivity [1][2][3][4][5], compact size [6][7][8][9][10] and controllable bandwidths [11][12][13][14][15] is an essential component in modern RF/microwave multi-service wireless communication systems. Up to now, many novel structures and design methods have been proposed in developing multi-band BPF [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Design of compact tri-band bandpass filter using stub-loaded quarter-wavelength SIRs

Wen

Zhu

et al. 2019

IEICE Electron. Express

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A compact tri-band bandpass filter (BPF) with high selectivity and wide stopband performance is developed based on a modified stubloaded quarter-wavelength stepped-impedance resonator (SL-SIR). The modified SL-SIR has flexibly controllable resonance modes under different schematics of the loaded stubs, from which, a tri-mode case is chosen to design a tri-band BPF with controllable centre frequencies and bandwidths. Furthermore, up to ten transmission zeros are created by introducing two source-load couplings simultaneously, which not only enhance significantly the selectivity of three passbands, but also widen greatly the stopband of the BPF. The tri-band BPF, operating at 1.27, 3.65, and 5.20 GHz, is designed and fabricated, and its measured responses are in good agreement with the simulated ones.

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“…The main part of tri-band transceiver, a passband filter is permitted to pass on three different frequency band signals and filtering undesired frequency bands [3]. Further, various triple-band bandpass filters have been reported using different concepts [4][5][6][7][8][9][10]. The conventional triple-band filters were designed by cascading of multiple pair of microstrip resonators [4], which gives comparatively large size.…”

Section: Introductionmentioning

confidence: 99%

“…Communication system requires different passband with different bandwidths, so design compliance is required for triple bandpass filter. In [10], independent control of bandwidths has been realized by coupling effect.…”

Section: Introductionmentioning

confidence: 99%

A Compact Triple Band Metamaterial Inspired Bandpass Filter Using Inverted S-shape Resonator

Chaudhary¹,

Chaudhary²

2018

RADIOENGINEERING

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This paper presents the compact metamaterial inspired triple-band filter using two inverted S-shape resonators and two C-shape stubs with via. The proposed filter is printed on FR-4 epoxy glass substrate with 1.6 mm thickness. The 3-dB measured fractional bandwidths are 40% (1.6-2.4 GHz), 16.5% (3.9-4.6 GHz) and 14.3% (5.2-6.0 GHz) at center frequencies 2.0 GHz, 4.25 GHz and 5.6 GHz, respectively. This filter offers electrical circuit size of 0.22λ g × 0.16λ g where given λ g is the guided wavelength at center frequency of the first passband 2.0 GHz. The performance parameter of the designed filter have been characterized by fractional bandwidth, insertion loss, dielectric constant, return loss, circuit size and group delay. Both simulated and measured results are shown to validate the proposed filter. Finally, the MTM properties of the proposed filter have been verified by extracting its dispersion diagram. It is suitable for GSM 1800, LTE 2300 and WiMAX (5.2-5.8 GHz) application.

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Novel Compact Quad-Band Bandpass Filter With Controllable Frequencies and Bandwidths

Cited by 35 publications

References 9 publications

A compact sept‐band bandpass filter utilising a single multi‐mode resonator

A compact sept‐band bandpass filter utilising a single multi‐mode resonator

Design of compact tri-band bandpass filter using stub-loaded quarter-wavelength SIRs

A Compact Triple Band Metamaterial Inspired Bandpass Filter Using Inverted S-shape Resonator

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