High Q-Factor Narrow-Band Bandpass Filter Using Cylindrical Dielectric Resonators for X-Band Applications

Karimzadeh-Jazi, Reza; Honarvar, Mohammad; Khajeh-Khalili, Farzad

doi:10.2528/pierl18041007

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…The initial filter design parameters are the center frequency of 3.5 GHz, a bandwidth of 200 MHz, an insertion loss (IL) of <3 dB, and an RL of 20 dB. The microstrip substrate of Rogers RT/duroid 5880, with a thickness of 787 μm and a relative dielectric constant ε r of 2.2 is used for the filter implementation [25][26][27]. The open-loop resonator is selected for this design because of its simplicity of manufacturing.…”

Section: Microstrip Filter Inter-resonator Couplingmentioning

confidence: 99%

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Design of Compact Parallel-Connected Chained Function Filters

Chinda,

Seoung,

Cheab

et al. 2023

J. Electromagn. Eng. Sci

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The design of compact parallel-connected chained function filters is presented in this paper. The proposed filters will offer reduced sensitivity to manufacturing tolerance within the specified bandwidth in comparison to conventional Chebyshev filters for C-band applications. A new filtering function according to a chained configuration is derived for fourth-order filters, and the synthesis procedures are presented. To demonstrate the feasibility of this approach, the circuit simulation based on parallel-connected topology is performed in an advanced design system, while the design and simulation of a fourth-order filter in dielectric technology are carried out in high-frequency simulation software. The prototype of fourth-order microstrip topology is fabricated using open-loop resonators. The overall circuit size of the filter is 2.5 cm × 4 cm. The achieved simulation and measured insertion/return loss are 0.409 dB/20 dB and 2.674 dB/18.074 dB, respectively. Extensive sensitivity analysis is conducted to prove the fabrication tolerance of the filter. The reduced sensitivity of the proposed filter to manufacturing tolerance is fully demonstrated using an open-loop microstrip technology, and its reliability is proven by theoretical analysis. The prototype results in this research are validated and agree with the theoretical results. In terms of implementation, this design technique will be a very useful mathematical tool for any filter design engineer.

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Section: Microstrip Filter Inter-resonator Couplingmentioning

confidence: 99%

“…The suitable electrical length at resonance is 180°. The coupling configuration between the adjacent resonators is a mixed coupling [24,25]. The coupling coefficient (K) values in Table 3 are obtained using the line calculation approach in an Advanced Design System (ADS) simulation software.…”

Section: Microstrip Filter Inter-resonator Couplingmentioning

confidence: 99%

Design of Compact Parallel-Connected Chained Function Filters

Chinda,

Seoung,

Cheab

et al. 2023

J. Electromagn. Eng. Sci

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“…There are several applications related to optical resonators where a high Q-factor is desired. These applications include high-performance lasers [29], narrow-bandwidth filters [30,31] and high-efficiency nonlinear optic devices [32]. The Q-factor is defined as λ res /FWHM, where λ res is the resonance wavelength and FWHM is the full width at half maximum of the resonance peak.…”

Section: Sensor Performancementioning

confidence: 99%

Nanoblocks embedded in L-shaped nanocavity of a plasmonic sensor for best sensor performance

Butt

Kazanskiy

2021

Optica Applicata

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In this work, we proposed a highly sensitive design of a plasmonic sensor which is formed by embedding a periodic array of nanoblocks in L-shaped cavity formed by the metal–insulator–metal waveguide. The nanoblocks are placed in the strong electric field confinement region to further enhance its strength by confining it to a small area. To validate the study, the spectral characteristics of the proposed sensor design is compared to the spectral characteristics of a standard design having the same geometric parameters excluding nanoblocks in the cavity. The study shows that the incorporation of 5 nanoblocks of length 25 nm in the cavity can provide best performance indicators in the form of sensitivity, figure of merit and Q-factor. The sensitivity, figure of merit and Q-factor of the proposed sensor design is 1065 nm/RIU, 251.17 and 343.4 which is significantly higher than the standard L-shape resonator design. The sensor design can be developed with a single fabrication step. Due to the ease of fabrication and the highly responsive nature of the design, it can be used in biomedical applications.

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“…For the said applications, multiband bandpass filters (BPFs) are the indispensable components for integrating with different communication modes into one device without interference. Due to their suitability of planar structure, low cost, small size and ease of fabrication [1]- [6] these filters are designed for…”

Section: Introductionmentioning

confidence: 99%

Design of a Compact Microstrip Triple Independently Controlled Pass Bands Filter for GSM, GPS and WiFi Applications

et al. 2020

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An ultra-compact triple-band bandpass filter based on dual-mode quarter-wave resonator for GSM, GPS, and WiFi applications is presented in this study. The filter consists of three quarter-wave resonators assisting in controlling each passband independently. The first operating frequency band is obtained by the direct-feed resonator which acts as a source to load coupling for the inner two resonators which are operating at higher frequency bands. The outermost resonator is coupled to the inner loaded resonators, thus a pair of transmission zeros between each passband can be excited and hence high-frequency selectivity can be obtained. To miniaturize the overall size of the filter, all resonators are folded and are jointly connected through a common metallic via with the ground. The design has a symmetric structure therefore, even-odd mode analysis method is applied to obtain the three controllable operating frequency bands. The first operating band is centered at 850 MHz which caters for GSM applications, while the second and third frequency bands centered at 1.57 GHz and 2.4 GHz fall in the GPS and WiFi wireless applications. The filter with an ultra-compact size of 0.10 λ g × 0.09 λ g (0.009λ 2 g) despite feed lines (λ g is the waveguide length centered at 850 MHz) is designed, fabricated and measured for the purpose of validation. Both the simulated and measured results are in good agreement and endorse the design concept. INDEX TERMS Tri-band filter, quarter-wavelength resonator, microstrip BPF filter, transmission zeros, wireless applications.

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High Q-Factor Narrow-Band Bandpass Filter Using Cylindrical Dielectric Resonators for X-Band Applications

Cited by 7 publications

References 12 publications

Design of Compact Parallel-Connected Chained Function Filters

Design of Compact Parallel-Connected Chained Function Filters

Nanoblocks embedded in L-shaped nanocavity of a plasmonic sensor for best sensor performance

Design of a Compact Microstrip Triple Independently Controlled Pass Bands Filter for GSM, GPS and WiFi Applications

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