Design of a modified hairpin bandpass filter using embedded radial stubs featuring ultrawide stopband

Sharifi, Mohammad Ali; Mashayekhi, Valiollah

doi:10.1016/j.aeue.2023.154624

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…For example, in radar systems, hairpin filters are used to process received signals, filtering out unwanted frequencies to improve the accuracy and reliability of the radar [32][33][34]. They are also widely employed in RF and microwave applications, where they contribute to the efficient operation of transmitters and receivers [35,36].…”

Section: Filter Designmentioning

confidence: 99%

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

Gugliandolo,

Quattrocchi,

Campobello

et al. 2024

Instruments

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In recent years, inkjet printing has emerged as a promising advanced fabrication technology in the field of electronics, offering remarkable advantages in terms of cost-effectiveness, design flexibility, and rapid prototyping. For these reasons, inkjet printing technology has been widely adopted in various applications, including printed circuit board fabrication, sensor development (e.g., temperature, humidity, and pressure sensing), and antenna and filter production, up to the microwave frequency range. The present paper is focused on the investigation of a methodology based on Monte Carlo simulations for quantitatively assessing the influence of fabrication tolerances on the performance of inkjet-printed microwave devices. In particular, the proposed methodology is applied to an inkjet-printed hairpin band pass filter specifically tailored for operation in the L band (i.e., from 1 GHz to 2 GHz). The initial design phase involved the use of computer aided design (CAD) software to optimize the geometric dimensions of the designed filter to closely match the desired performance specifications in terms of bandwidth, insertion loss, and return loss. Later, a Monte Carlo analysis was conducted to evaluate the propagation of tolerances in the fabrication process throughout the design and to estimate their effects on device performance. The fabrication process exploited the advanced capabilities of the Voltera inkjet printer, which was used to deposit a silver-based conductive ink on a commercial Rogers substrate. The device’s performance was evaluated by comparing the simulated scattering parameters with those measured on the developed filter using a vector network analyzer (VNA), thus ensuring accurate validation of real-world performance.

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Section: Filter Designmentioning

confidence: 99%

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

Gugliandolo,

Quattrocchi,

Campobello

et al. 2024

Instruments

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“…However, conventional uniform impedance resonators typically have limited stopband performance with a relatively large overall size. Various small-size planar filter techniques have been previously studied [3][4][5][6][7][8][9][10][11][12][13]. For compact requirements, dual-mode half-wavelength resonators in degenerate [3,4] or non-degenerate modes have been studied [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…These filters are suitable for a bandwidth that is approximately greater than 10% and less than 30%. Also, half-wavelength hairpin-line resonators have been structured in various topologies for compact configurations [8][9][10][11][12][13]. The parallel-coupled half-wavelength resonators are folded to form hairpin resonators as in [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…A modified hairpin-line resonator is obtained by adding coupled lines at the open end for a greater size reduction, as suggested in [10], or by an arrangement in the form of cross-coupled lines as in [11]. In [12], a hairpin-line resonator is modified by a radial stub to improve the wide stopband characteristics. Recently, the half-wavelength wave resonator has been bending in a folded shape for compact applications [13].…”

Section: Introductionmentioning

confidence: 99%

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A New Compact Wideband Filter Based on a Coupled Stepped Impedance Resonator

Sheta,

Elshafiey

2024

Micromachines

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A new compact wideband filter is introduced to address the requirements of recent communication and radar systems. The filter is based on a quarter-wavelength short-circuit coupled stepped impedance resonator (SIR). The analytical solution shows that the suggested SIR resonator provides a compact size and a wide stopband response, which are essential features in many wireless communication systems. The analytical results also reveal that increasing the impedance ratio of the SIR extends the stopband by increasing the first spurious response and reducing its total length. A compact two-coupled short-circuit SIR filter is designed at 1.23 GHz. The design approach is validated using an ideal transmission line modeling analysis and electromagnetic simulation using CST Microwave Studio 2021. The proposed structure is shown to be flexible, allowing the achievement of a relative bandwidth as low as 5% and as high as 50%. A four-resonator filter is designed by cascading two stages of the designed two-coupled short-circuit SIR filter, which are coupled through a quarter-wavelength line. The simulation results illustrate that the suggested structure can be used to design a filter with any number of resonators. The filter is implemented using a high-resolution LPKF laser machine on Rogers RT/duroid 6010.2LM material with a thickness of 0.635 mm. From the measurements, the bandwidth is found to be 390 MHz and centered at 1325 MHz (29.4% relative bandwidth) and the insertion loss is 1.3 dB. The simulation and experimental results verify the proposed approach and indicate the potential of this component in meeting the design requirements of next-generation microwave circuits related to flexibility and size-compactness.

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A systematic approach for the development of wide band band pass filters using resonators

Mani,

Rao Inabathini

2024

AEU - International Journal of Electronics and Communications

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Design of a modified hairpin bandpass filter using embedded radial stubs featuring ultrawide stopband

Cited by 4 publications

References 29 publications

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

A New Compact Wideband Filter Based on a Coupled Stepped Impedance Resonator

A systematic approach for the development of wide band band pass filters using resonators

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