Design of a Compact Quad-Channel Microstrip Diplexer for L and S Band Applications

Roshani, Sobhan; Yahya, Salah I.; Mezaal, Yaqeen S.; Chaudhary, Muhammad Akmal; Al-Hilali, Aqeel A.; Mojirleilani, Afshin; Roshani, Sobhan

doi:10.3390/mi14030553

Cited by 17 publications

(15 citation statements)

References 42 publications

(38 reference statements)

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“…21 Lastly, LCD screens degrade rapidly at low wavelengths and are thus limited to >400 nm illumination, which reduces material selection and ink efficiency. 12, 20, 22, 23 Prior work has shown success in leveraging LCD 3D printing for microfluidic master mold fabrication, 24–27 but the potential for throughput manufacturing on large build plates and direct LCD 3D printing of open and embedded microchannels has not been shown.…”

Section: Introductionmentioning

confidence: 99%

High-resolution low-cost LCD 3D printing of microfluidics

Shafique,

Karamzadeh,

Kim

et al. 2024

Preprint

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The fabrication of microfluidic devices has progressed from cleanroom manufacturing to replica molding in polymers, and more recently to direct manufacturing by subtractive (e.g., laser machining) and additive (e.g., 3D printing) techniques, notably digital light processing (DLP) photopolymerization. However, many methods require technical expertise and while DLP 3D printers remain expensive at a cost ∼15-30K USD with ∼8M pixels that are 25-40 µm in size. Here, we introduce (i) the use of low-cost (∼150-600 USD) liquid crystal display (LCD) photopolymerization 3D printing with ∼8M-58M pixels that are 18-35 µm in size for direct microfluidic device fabrication and (ii) a poly(ethylene glycol) diacrylate-based ink developed for LCD 3D printing (PLInk). We optimized PLInk for high resolution, fast 3D printing and biocompatibility while considering the illumination inhomogeneity and low power density of LCD 3D printers. We made lateral features as small as 75 µm, 22-µm-thick embedded membranes, and circular channels with a 110 µm radius. We 3D printed microfluidic devices previously manufactured by other methods, including an embedded 3D micromixer, a membrane microvalve, and an autonomous capillaric circuit (CC) deployed for interferon-γ detection with excellent performance (limit of detection: 12 pg mL-1, CV: 6.8%), and we demonstrated compatibility with cell culture. Finally, large area manufacturing was illustrated by printing 42 CCs with embedded microchannels in <45 min. LCD 3D printing together with tailored inks pave the way for democratizing access to high-resolution manufacturing of ready-to-use microfluidic devices by anyone, anywhere.

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Section: Introductionmentioning

confidence: 99%

High-resolution low-cost LCD 3D printing of microfluidics

Shafique,

Karamzadeh,

Kim

et al. 2024

Preprint

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“…In [32], two dual-band filters (BPFs) are used to create a quad channel, but insertion losses at operating bands are high. In [32][33][34], neural network models are used to obtain the desired values of parameters in microwave devices, which resulted in optimum performances.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Dual-Band Diplexer Design with High Port Isolation for UHF/SHF Applications Using a Neural Network Model

2023

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In this paper, a compact dual-band diplexer is proposed using two interdigital filters. The proposed microstrip diplexer correctly works at 2.1 GHz and 5.1 GHz. In the proposed diplexer, two fifth-order bandpass interdigital filters are designed to pass the desired frequency bands. Applied interdigital filters with simple structures pass the 2.1 GHz and 5.1 GHz frequencies and suppress other frequency bands with high attenuation levels. The dimensions of the interdigital filter are obtained using the artificial neural network (ANN) model, constructed from the EM-simulation data. The desired filter and diplexer parameters, such as operating frequency, bandwidth, and insertion loss, can be obtained using the proposed ANN model. The insertion loss parameter of the proposed diplexer is 0.4 dB, and more than 40 dB output port isolation is obtained (for both operating frequencies). The main circuit has the small size of 28.5 mm × 23 mm (0.32 λg × 0.26 λg). The proposed diplexer, with the achieved desired parameters, is a good candidate for UHF/SHF applications.

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“…Filters and power dividers are vital blocks in new microwave and communications circuits [9]. In modern microwave circuits, a compact size and harmonics rejection are required to reduce the circuit area and costs [10].…”

Section: Introductionmentioning

confidence: 99%

A Fast Surrogate Model-Based Algorithm Using Multilayer Perceptron Neural Networks for Microwave Circuit Design

et al. 2023

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This paper introduces a novel algorithm for designing a low-pass filter (LPF) and a microstrip Wilkinson power divider (WPD) using a neural network surrogate model. The proposed algorithm is applicable to various microwave devices, enhancing their performance and frequency response. Desirable output parameters can be achieved for the designed LPF and WPD by using the proposed algorithm. The proposed artificial neural network (ANN) surrogate model is employed to calculate the dimensions of the LPF and WPD, resulting in their efficient design. The LPF and WPD designs incorporate open stubs, stepped impedances, triangular-shaped resonators, and meandered lines to achieve optimal performance. The compact LPF occupies a size of only 0.15 λg × 0.081 λg, and exhibits a sharp response within the transmission band, with a sharpness parameter of approximately 185 dB/GHz. The designed WPD, operating at 1.5 GHz, exhibits outstanding harmonics suppression from 2 GHz to 20 GHz, with attenuation levels exceeding 20 dB. The WPD successfully suppresses 12 unwanted harmonics (2nd to 13th). The obtained results demonstrate that the proposed design algorithm effectively accomplishes the LPF and WPD designs, exhibiting desirable parameters such as operating frequency and high-frequency harmonics suppression. The WPD demonstrates a low insertion loss of 0.1 dB (S21 = 0.1 dB), input and output return losses exceeding 30 dB (S11 = −35 dB, S22 = −30 dB), and an output ports isolation of more than 32 dB (S23 = −32 dB), making it suitable for integration into modern communication systems.

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Design of a Compact Quad-Channel Microstrip Diplexer for L and S Band Applications

Cited by 17 publications

References 42 publications

High-resolution low-cost LCD 3D printing of microfluidics

High-resolution low-cost LCD 3D printing of microfluidics

A Miniaturized Dual-Band Diplexer Design with High Port Isolation for UHF/SHF Applications Using a Neural Network Model

A Fast Surrogate Model-Based Algorithm Using Multilayer Perceptron Neural Networks for Microwave Circuit Design

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