Dual-Band Differential Bandpass Filters Using Quadruple-Mode Stubs-Loaded Ring Resonator With Intrinsic Common-Mode Suppression for 5G

Guan, Xuehui; Zhao, Bo; Ren, Baoping

doi:10.1109/access.2020.3037494

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…Many efforts have also been dedicated to the implementation of multiband balanced filters (see [130], [159], [160], [161], [162], [163], [164], [165], [166], [167], [168], [169], [170], [171], [172] and [10, chapters 13 and 14]). In some cases, such filters have been implemented with topologies based on coupled embedded resonators (able to generate two transmission bands for the differential mode), and the working principle is similar to that of the single-ended counterparts.…”

Section: B Narrowband and Multiband Balanced Filters And Diplexersmentioning

confidence: 99%

Balanced Microwave Transmission Lines, Circuits, and Sensors

Martín¹,

Medina

2023

IEEE J. Microw.

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This paper provides an overview of balanced (or differential-mode) structures operating at microwaves, including common-mode suppression filters, balanced filters and circuits with intrinsic common-mode suppression, and differential-mode sensors. The increasing interest for balanced structures within the framework of communication circuits and sensors, related to their major robustness against electromagnetic interference (EMI), noise, and environmental factors, is duly justified. Then the paper reports various approaches for the implementation of common-mode suppression filters, balanced filters and circuits (including narrowband and wideband filters, multi-band filters, power dividers, couplers and phase shifters), and differential-mode sensors (mainly devoted to the measurement of permittivity and related variables). Rather than providing a detailed analysis of the different considered implementations/approaches, the main goal of this review paper is to discuss, and compare in some cases, the main proposed strategies (pointed out in the up-to-date state-of-the-art) for optimizing the performance of the various differential-mode devices under study.

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Section: B Narrowband and Multiband Balanced Filters And Diplexersmentioning

confidence: 99%

Balanced Microwave Transmission Lines, Circuits, and Sensors

Martín¹,

Medina

2023

IEEE J. Microw.

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“…The limitation of the filter in Figure 4(e) is the narrow bandwidth and low rejection ratio between the passbands. These limitations are addressed by loading the stubs (Khan and Zhao, 2021; Zhang et al , 2020; Guan et al , 2020; Chen et al , 2013) to the hexagonal ring resonator as described in Figure 2(f). V-shaped stubs connected to the hexagonal ring resonator are preferred to improve the impedance characteristics of the proposed bandpass filter.…”

Section: Design Of the Reconfigurable Bandpass Filtermentioning

confidence: 99%

Miniaturized bandwidth reconfigurable microwave bandpass filter

Ponnammal

Manjula²

2022

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Purpose Modern wireless communications need novel microwave components that can be effectively used for high data rate and low-power applications. The operating environment decides the severity of the noise coupled to the transceiver system from the ambient environment. In a deep fading environment, narrowband systems fail where the wideband systems come for rescue. Thus, the microwave components are ought to switch between the narrowband and wideband states. This paper aims to study the design of a bandpass filter to meet the requirements by appropriately switching between the dual narrowband frequencies and single ultra-wideband frequency band. Design/methodology/approach The design and implementation of a compact microwave filter with reconfigurable bandwidth characteristics are presented in this paper. The proposed filter is constructed using a hexagonal ring with shorted perturbation along one corner. The filter is capacitively coupled to the external excitation source. External stubs are connected to the corners of the hexagonal resonator to obtain dual passband characteristics centred at 2.1 and 4.5 GHz. The external stubs are configured to achieve bandwidth reconfigurable characteristics. PIN diodes are used with a suitable biasing network to obtain reconfiguration. In the reconfigured state, the proposed two-port filter offers a continuous bandwidth from 2.1 to 5.9 GHz. The roll-off rate along the band edges is improved by increasing the order of the filter. Findings The proposed filter operates in two states. In state 1, the filter operates with dual frequencies centred around 2 and 4.5 GHz with insertion loss less than <1 dB and return loss greater than 13 dB with a peak return loss of 21 and 31 dB at 2.1 and 2.15 GHz, respectively. In state 2, the filter operates from 2.1 to 5.9 GHz with insertion loss less than 1 dB and return loss greater than 12 dB. The filter exhibits four-pole characteristics with a peak return loss greater than 22 dB. Thus, the fractional bandwidth of the proposed filter is 17% and 16% in state 1, whereas the fractional bandwidth is 95% in state 2. Originality/value The proposed filter is the first of its kind to simultaneously offer miniaturization and bandwidth reconfiguration. The proposed second-order filter has two-pole characteristics in the narrowband state, whereas four-pole characteristics are realized in the wideband state. The growing interest in 4G and 5G wireless communications makes the proposed filter a suitable candidate for operation in the rich scattering environment.

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“…Multiple examples of passive devices implemented with printed circuit technology can be found in more recent literature; for instance, single-to-balanced power dividers [5], balanced rat-race couplers [6], coupled-line couplers [7], balanced wideband phase shifters [8], and dual-band balanced filters [9]. Most of these devices are designed to strongly suppress the common-mode (CM) signal while preserving the desired differential-mode (DM) response within the frequency band(s) of interest.…”

mentioning

confidence: 99%

Glide Symmetry Applied to Printed Common-Mode Rejection Filters

Mouris

Fernández‐Prieto

Rio

et al. 2022

IEEE Trans. Microwave Theory Techn.

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In this article, we present a novel application of glide symmetry to differential lines with common-mode (CM) rejection filter properties. Two different topologies are investigated. First, glide symmetry is applied to a pair of differential lines where ground-connected mushrooms are employed as a CM rejection structure. The same idea is also used in a pair of differential lines where defective ground structures are introduced to stop the CM propagation. It is demonstrated that the CM rejection bandwidth is drastically increased when glide symmetry is exploited in both topologies when compared with their corresponding structures without glide symmetry. Furthermore, we show that the differential-mode propagation is hardly affected by the use of glide symmetry, ensuring the good integrity of the transmitted information. Experimental demonstration for both mushroom and defected ground structure is provided. Good agreement between simulations and measurements results is observed.

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Dual-Band Differential Bandpass Filters Using Quadruple-Mode Stubs-Loaded Ring Resonator With Intrinsic Common-Mode Suppression for 5G

Cited by 4 publications

References 24 publications

Balanced Microwave Transmission Lines, Circuits, and Sensors

Balanced Microwave Transmission Lines, Circuits, and Sensors

Miniaturized bandwidth reconfigurable microwave bandpass filter

Glide Symmetry Applied to Printed Common-Mode Rejection Filters

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