Compact $X$ -Band Filter Based on Substrate Integrated Coaxial Line Stubs Using Advanced Multilayer PCB Technology

Cariou, Mathieu; Potelon, Benjamin; Quendo, Cédric; Cadiou, Stéphane; Schlaffer, Erich; Pessl, Walter; Fevre, Alain Le

doi:10.1109/tmtt.2016.2632114

Cited by 37 publications

(16 citation statements)

References 41 publications

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“…Rx (1) in which U is a scalar objective function, R(x) represents a response of the EM simulation model of the optimized structure, whereas x stands for a vector of adjustable parameters. Clearly, a definition of the function U depends on the particular circuit, selected performance figures, and constraints imposed on the system.…”

Section: Em-driven Design Closurementioning

confidence: 99%

“…Then, the actual acceptance threshold value γ ϕ , that permits attaining ϕ, is obtained using statistical optimization. The following problem needs to be solved 1 .…”

Section: Trust-region Optimization With Reduced Sensitivity Updates Amentioning

confidence: 99%

“…Small size has become a prerequisite in the design of many high-frequency structures, including RF, microwave and antenna components [1], [2]. The fundamental challenges come from physical limitations, e.g., some of the circuit dimensions being proportional to the guided wavelengths.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Gradient-Based Algorithm with Numerical Derivatives for Expedited Optimization of Multi-Parameter Miniaturized Impedance Matching Transformers

Koziel¹,

Pietrenko‐Dabrowska²

2019

RADIOENGINEERING

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Full-wave electromagnetic (EM) simulation tools have become ubiquitous in the design of microwave components. In some cases, e.g., miniaturized microstrip components, EM analysis is mandatory due to considerable cross-coupling effects that cannot be accounted for otherwise (e.g., by means of equivalent circuits). These effects are particularly pronounced in the structures involving slow-wave compact cells and their numerical optimization is challenging due to expensive simulations and large number of parameters. In this paper, a novel gradient-based procedure with numerical derivatives is proposed for expedited optimization of compact microstrip impedance matching transformers. The method restricts the use of finite differentiation which is replaced for selected parameters by a rank-one Broyden updating formula. The usage of the formula is governed by an acceptance parameter which is made dependent on the parameter space dimensionality. This facilitates handling circuits of various complexities. The proposed approach is validated using three impedance matching transformer circuits with the number of parameters varying from ten to twenty. A significant speedup of up to 50 percent is demonstrated with respect to the reference algorithm. . His research interests include CAD and modeling of microwave and antenna structures, simulation-driven design, surrogate-based optimization, space mapping, circuit theory, analog signal processing, evolutionary computation and numerical analysis. Anna PIETRENKO-DABROWSKA (corresponding author) received the M.Sc. and Ph.D. degrees in Electronic Engineering from Gdansk University of Technology, Poland, in 1998 and 2007, respectively. Currently, she is an Associate Professor with Gdansk University of Technology, Poland. Her research interests include simulationdriven design, design optimization, control theory, modeling of microwave and antenna structures, numerical analysis.

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Section: Em-driven Design Closurementioning

confidence: 99%

“…Then, the actual acceptance threshold value γ ϕ , that permits attaining ϕ, is obtained using statistical optimization. The following problem needs to be solved 1 .…”

Section: Trust-region Optimization With Reduced Sensitivity Updates Amentioning

confidence: 99%

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Efficient Gradient-Based Algorithm with Numerical Derivatives for Expedited Optimization of Multi-Parameter Miniaturized Impedance Matching Transformers

Koziel¹,

Pietrenko‐Dabrowska²

2019

RADIOENGINEERING

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“…Recently, SICL has obtained more attention in the microwave technical field. At present, the SICL can be used to design the antenna [9][10][11][12][13][14], balun [15], and transition between SICL [16,17] and filter [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…In [18], a compact filter based on SICL stubs was designed using an advanced multilayer printed circuit board (PCB) substrate, and this technology is convenient to implement high-density interconnect (HDI) devices, which are dedicated to mass market and require to be compact and low cost. Borja et al [19] presented the design and…”

Section: Introductionmentioning

confidence: 99%

A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application

Liu

Wang

Zhang

et al. 2020

International Journal of Antennas and Propagation

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The substrate-integrated coaxial line (SICL) is a potential transmission line due to its good characteristics of high efficiency, nondispersive, and single operational mode. A tapered slot SICL balun is proposed, which can realize the impedance transformation from the microstrip line to the coplanar strip line (CPS). At the same time, the proposed balun can transform the quasi-TEM mode of the microstrip line to the TEM mode of CPS. A printed dipole radiator is designed and is fed by the proposed SICL balun to achieve the impedance matching. The dual-polarized radiation mode is realized by employing two orthogonal printed dipoles. For each polarization radiator, the CPS is bended to avoided the occlusion of two polarization ports and realize the direct assembling of two orthogonal printed circuits. What is more, the assembling method is advantageous to improve the port isolation degree and decrease the cross polarization level. To improve the ratio of front to back (F/B) of the radiation pattern, a cylindrical metal cavity is adopted. According to the results of simulation and experiments, the VSWR of each port is lower than 2, the isolation degree between two polarization ports is higher than 20 dB, and the cross polarization level at the boresight is lower than −20 dB at the operational frequency. The patterns of two ports are almost symmetric, and high radiation efficiency is obtained. The experimental results of the principle prototype verify the design schemes of the balun and the dual-polarized antenna. The proposed dual-polarized antenna fed by the tapered slot SICL balun is suitable for the airborne radar application.

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Optimal design of third‐order microstrip bandpass filters by direct synthesis technique (DST)

Xiao

Gong

Zhang

2018

Circuit Theory & Apps

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SummaryTo design microstrip filters is not easy for the sake of their distributed‐element effect. Undoubtedly, to understand their physical mechanism is very important to their design. In this paper, one effective approach to design some third‐order microstrip bandpass filters with each of 2 transmission zeros at each side of the passband is discussed. Lumped‐element equivalent circuits are used to represent these microstrip filters. Then, these lumped‐element equivalent circuits can be synthesized by direct synthesis technique we recently proposed, so that it is likely to calculate initial structural parameters of these microstrip filters and then facilitate their design. Verified by the measured results of the filter designed through the approach in this paper, the performance of the filters is close to ideal frequency responses. Furthermore, another third‐order microstrip bandpass filter is presented, in which open‐circuited stubs at input/output ports are introduced to suppress one specified harmonic to improve out‐of‐band attenuation.

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Compact $X$ -Band Filter Based on Substrate Integrated Coaxial Line Stubs Using Advanced Multilayer PCB Technology

Cited by 37 publications

References 41 publications

Efficient Gradient-Based Algorithm with Numerical Derivatives for Expedited Optimization of Multi-Parameter Miniaturized Impedance Matching Transformers

Efficient Gradient-Based Algorithm with Numerical Derivatives for Expedited Optimization of Multi-Parameter Miniaturized Impedance Matching Transformers

A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application

Optimal design of third‐order microstrip bandpass filters by direct synthesis technique (DST)

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