Ultra-wide stopband in a compact low pass filter using stepped impedance resonators and novel techniques

Murphy, Luke; Yazdani, Mohsen; Arvas, E.

doi:10.1109/icuwb.2012.6340430

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…For example, an improved u-shaped microstrip meander-line slow wave structure for high efficiency Gband travelling wave tubes was designed using CST Microwave Studio , which is based on the method of finite differences in time domain [10]. Ultra-wide stopband in a compact low pass filter using stepped impedance resonators is designed using Sonnet , which is based on the method of moments [11]. However, the duration of calculations can reach dozens of hours even if modern workstations are used [12].…”

Section: Introductionmentioning

confidence: 99%

Delay Systems Synthesis using Multi-Layer Perceptron Network

et al. 2018

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The aim of this paper is to accelerate development and investigation of the delay systems. The computational time for investigation of particular design of delay system may take from several minutes up to several days. To achieve the required constructional parameters of the system, the iterative calculations usually should be repeated many times. In this paper, an artificial neural network is proposed to be used as the universal approximator for solving mathematical problems of delay system investigation instead of usual analytical and numerical techniques. The application of a multi-layer perceptron is proposed for approximation of solution space with discrete estimates, which were initially received by application of numerical techniques. Different structures of the multi-layer perceptron were tested for approximation. The difference between delay systems synthesis, which was estimated using numerical techniques and trained multi-layer perceptron did not exceed 5% for any of the six design parameter values. The execution time for estimating single delay system was reduced from 240 s to 20 ms. Such fast estimation of design parameters enables performing delay system analysis and design in real time, preserving time for structure visualization in 3D or virtual reality environment.

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Section: Introductionmentioning

confidence: 99%

Delay Systems Synthesis using Multi-Layer Perceptron Network

et al. 2018

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“…The disadvantages in this works are the complicated design and fabrication due to the capacitor fingers, which are very close to each other and to the emerging undesired electric coupling, which can negatively influence the filter results. Murphy et al proposed a filter with stepped‐impedance resonators (SIRs) as a technique with the aim at ultra‐wide stopband and a sharp transition domains .…”

Section: Introductionmentioning

confidence: 99%

Design of a very compact U‐HI‐LO low‐pass filter using meander technique and quasi horn inductors for L‐band and C‐band applications

Boutejdar

2016

Micro & Optical Tech Letters

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In this article, a novel very compact low pass filters, using Hi‐Lo technique and meander method are proposed. The several proposed filters are designed using a modification along the microstrip line by addition of U form and a meander shape. The compact meander LPF consists of two thin microstrip lines, which are connected with 50‐Ω microstrip feed lines and thus with the both SMA connectors and a width microstrip patch placed in the middle of the structure. This meander Hi‐Lo topology has been placed on the RO4003 substrate with a relative dielectric constant εr = 3.38 and thicknesses h = 0.813 mm and a loss tangent of 0.0027. Additionally to a very good compactness, the structure exhibits simple design and fabrication, very low insertion loss in the passband of 1.5 dB, and it achieves a wide rejection bandwidth with overall 20 dB attenuation from 5.7 to 6.3 GHz. The compact low pass structure occupies an area of (0.337 λg × 0.253 λg) where λg = 60 mm is the wavelength at the cut‐off frequency 2.75 GHz. The simulated and measured results show good agreement and validate the proposed approach. Such compact filter structures are used in various microwave system applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2897–2901, 2016

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“…The disadvantages in this work are the complicated design and fabrication due to the capacitor fingers, which are very close to each other and the emerging undesired electric coupling, which can negatively influence the filter response. Murphy et al proposed a filter with stepped-impedance resonators (SIRs) as a technique with the aim of an ultra-wide stopband and a sharp transition domains [17]. Mokhtari et al proposed a design methodology to these kind of filters using cascaded resonators on a coplanar structure [18].…”

Section: Introductionmentioning

confidence: 99%

Design of Low-Pass Filter Using Meander Inductor and U-Form Hi-Lo Topology With High Compactness Factor for L-Band Applications

Ali¹,

Boutejdar²

2017

PIER M

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Abstract-In this paper, novel compact low-pass filters using Hi-Lo technique and meander method are proposed. Series of the proposed filters are designed by adding modifications along the microstrip line (meander inductor) and by using U-form topology. The size of the proposed filter can be reduced by 15% compared to the conventional filter while maintaining the optimal low-pass features. The compact meander LPF consists of two thin microstrip lines, which are connected with 50 Ω microstrip feed lines and a microstrip patch placed in the middle of the structure. The thin lines and the microstrip patch correspond to inductance and capacitance, respectively. The proposed meander Hi-Lo topology has been mounted on an RO4003 substrate with a relative dielectric constant ε r = 3.38, thickness h = 0.813 mm and loss tangent 0.0027. The compact L-band low-pass structure has a size of (0.263λ g × 0.175λ g ) where λ g = 57 mm is the wavelength at the cutoff frequency 2.85 GHz. In addition to a good compactness, the structure exhibits a simple design, very low insertion loss in the passband (L-band) of less than 0.3 dB, and it achieves a wide rejection bandwidth with a 20 dB attenuation from 5.3 to 6.3 GHz. The excellent LPF characteristics are verified through simulations and measurements where a good consistency can be observed. Such compact filter structures are expected to be used in various microwave system applications.

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Ultra-wide stopband in a compact low pass filter using stepped impedance resonators and novel techniques

Cited by 5 publications

References 7 publications

Delay Systems Synthesis using Multi-Layer Perceptron Network

Delay Systems Synthesis using Multi-Layer Perceptron Network

Design of a very compact U‐HI‐LO low‐pass filter using meander technique and quasi horn inductors for L‐band and C‐band applications

Design of Low-Pass Filter Using Meander Inductor and U-Form Hi-Lo Topology With High Compactness Factor for L-Band Applications

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