Microfluidically Tunable Microstrip Filters

Diedhiou, Daouda Lamine; Sauleau, Ronan; Boriskin, Artem

doi:10.1109/tmtt.2015.2435704

Cited by 21 publications

(14 citation statements)

References 22 publications

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“…Recently, many single-band differential planar BPFs based on different techniques have been reported [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. The main difference between these designs is the structures utilized.…”

Section: Single-band Differential Microstrip Bpfsmentioning

confidence: 99%

“…Therefore, and to achieve the requirements of high-performance tunable/reconfigurable RF devices, it is highly recommended to develop and investigate the design of tunable BPFs with differential-fed ports to improve the integration properties [35,[51][52][53]. During the past few years, fluidics-based resonating technologies have been widely applied in tunable filter circuits [35,[54][55][56]. Zhou et al [35] presented a novel microfluidics-based reconfigurable differential-fed microstrip filter with accurately tuned passband transmission.…”

Section: Of 25mentioning

confidence: 99%

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A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges

Al‐Yasir

Parchin

Abdulkhaleq

et al. 2020

Sensors

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Differentially driven devices represent a highly promising research field for radio frequency (RF), microwave (MW), and millimeter-wave (mmWave) designers and engineers. Designs employing differential signals are essential elements in low-noise fourth-generation (4G) and fifth-generation (5G) communications. Apart from the conventional planar MW components, differential-fed balanced microstrip filters, as promising alternatives, have several advantages, including high common-mode rejection, low unwanted radiation levels, high noise immunity, and wideband harmonic suppression. In this paper, a comprehensive and in-depth review of the existing research on differential-fed microstrip filter designs are presented and discussed with a focus on recent advances in this research and the challenges facing the researchers. A comparison between different design techniques is presented and discussed in detail to provide the researchers with the advantages and disadvantages of each technique that could be of interest to a specific application. Challenges and future developments of balanced microstrip bandpass filters (BPFs) are also presented in this paper. Balanced filters surveyed include recent single-, dual-, tri-, and wide-band BPFs, which employ different design techniques and accomplish different performances for current and future wireless applications.3 of 25 between these designs follow each section. Section 6 shows the challenges and future development of differential-fed microstrip BPFs. Finally, Section 7 presents the conclusion of our review. Single-Band Differential Microstrip BPFsRecently, many single-band differential planar BPFs based on different techniques have been reported [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. The main difference between these designs is the structures utilized. Several types of resonators and techniques can be used to obtain a single-band differential planar BPF with different performance. Generally, the common-mode noise suppression is an interesting topic for high-speed and high-frequency wireless applications. The common-mode noise signals can degrade the differential-mode transmitted signals as well as the entire power of such wireless applications. To suppress the common-mode signals, some researchers and engineers have proposed the use of a series of combinations of single-band differential-fed planar filters and transmission lines [39]. However, this technique will lead to a large area and so not suitable for new demands of compact systems. However, Ebrahimi et al. have proposed a new balanced BPF using dumbbell-shaped defected ground structures (DGSs) [42]. The proposed DGS resonator provides the option of implementing higher-order differential filters. Also, in comparison with similar techniques such as S-shaped complementary split-ring resonators (CSRRs), which have similar structures in common-mode and differential mode transmission [39], differential filters based on DGSs provide high common-mode attenuation by utilizing two separate equiv...

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Section: Single-band Differential Microstrip Bpfsmentioning

confidence: 99%

Section: Of 25mentioning

confidence: 99%

A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges

Al‐Yasir

Parchin

Abdulkhaleq

et al. 2020

Sensors

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“…Liquid loading on the CPW resonator gives capacitive effect thereby tuning the operating frequency. Also, high permittivity dielectric fluid is loaded using plastic tubes to change the effective permittivity which enables the tuning of the center frequency . Micro‐fluid channel and resonators are adopted in ref.…”

Section: Introductionmentioning

confidence: 99%

“…Also, high permittivity dielectric fluid is loaded using plastic tubes to change the effective permittivity which enables the tuning of the center frequency. 15 Micro-fluid channel and resonators are adopted in ref. 16 to achieve frequency reconfiguration.…”

Section: Introductionmentioning

confidence: 99%

Multi-band reconfigurable microwave filter using dual concentric resonators

Kingsly

Kanagasabai

Alsath

et al. 2018

Int J RF Microw Comput Aided Eng

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This article presents the design and testing of a novel frequency reconfigurable microwave filter. The filter structure is composed of an all stop resonator coupled with C‐ and E‐shaped parasitic resonators. PIN diodes are located at suitable positions to achieve multi‐band reconfiguration from 1.2 to 3.2 GHz making the filter suitable for multiple wireless communication systems. The frequency and bandwidth of the filter are governed by the length of the resonators and coupling between the resonators and the transmission line, respectively. A sharp rejection of −30 dB is observed between the passbands. The proposed filter offers 56% size reduction with flat group delay performance. The prototype filter is fabricated and the simulation results are validated using experimental measurements. The measurement results show good agreement with the simulation results.

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“…Moreover, the risk of electrical breakdown for electrically tunable filters can also limit their applicability in some high-power systems. To overcome these disadvantages, mechanically tunable devices such as phase shifter [5], filter [6] and antennas [7,8] using liquid metals or microfluidics have been of great interest recently. Unfortunately, the accurate controlling of the operation frequency has not been mentioned so far.…”

mentioning

confidence: 99%

Novel microfluidically tunable bandpass filter with precisely‐controlled passband frequency

Zhou¹,

Chen²

2016

Electron. lett.

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A novel microfluidically tunable bandpass filter (BPF) is proposed and it consists of a second-order microstrip BPF with five plastic tubes placed above the coupled quarter-wavelength resonators. The tubes can be filled with high-permittivity water. By properly choosing the locations of the tubes and the water-filling sequence, the electrical length of the resonator can be tuned, and thus the passband centre frequency of the filter can be precisely adjusted. A demonstration example is designed, and the simulated and measured results of the filter are given for verifying the theoretical prediction.

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Microfluidically Tunable Microstrip Filters

Cited by 21 publications

References 22 publications

A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges

A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges

Multi-band reconfigurable microwave filter using dual concentric resonators

Novel microfluidically tunable bandpass filter with precisely‐controlled passband frequency

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