Waveguide band-pass filter with reduced sensitivity to fabrication tolerances for Q-band payloads

Teberio, Fernando; Soto, Pablo; Arregui, I.; Lopetegi, T.; Cogollos, S.; Arnedo, I.; Martín-Iglesias, Petronilo; Boria, Vicente E.; Laso, M.A.G.

doi:10.1109/mwsym.2017.8058897

Cited by 15 publications

(23 citation statements)

References 8 publications

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“…Last but not least, the novel meandered filters have E-plane symmetry, reducing the measured insertion loss and the PIM due to the fabrication assembly. The design method (Section II) has been demonstrated with two examples (Section III): a meandered BPF of order 13 (implemented with multiple topologies) with the same frequency specifications as in [35], and a meandered LPF of order 11, with transmission zeros, fulfilling the same specifications as in [33]. The LPF, and two BPF topologies, have been fabricated and measured, showing a very good agreement between simulated and measured results.…”

Section: Rectangular Waveguide Filtersmentioning

confidence: 98%

“…Stepped-impedance waveguide structures have been widely used for LPFs [24]- [34], and also for BPFs [24]- [28], [35], always featuring an in-line (straight) topology, and they still remain a very common solution for the implementation of waveguide LPFs. Fortunately, stepped-impedance BPFs are very good candidates as it was demonstrated in [35], where a straight BPF with reduced sensitivity to manufacturing tolerances was proposed. However, although the manufacturing yield of the structure was clearly enhanced, the price to pay was the total size of the final device.…”

Section: Rectangular Waveguide Filtersmentioning

confidence: 99%

“…7) is designed utilizing the first inherent passband replica of the classical steppedimpedance low-pass prototype, centered at = (see Fig. 4), [35]. The synthesis procedure begins by fixing the order of the filter, , the required in-band return loss, and its lower and upper frequencies, 1 and 2 , corresponding to = − and = + , respectively, see Fig.…”

Section: A Meandered Bpfmentioning

confidence: 99%

“…Typically, this parameter is fixed as the standard port width. However, it can be reduced to enhance the fabrication yield of the filter as it was demonstrated in [35]. This is due to the fact that the electrical bandwidth of the filter will be wider for reduced widths.…”

Section: A Meandered Bpfmentioning

confidence: 99%

“…The novel meandered topology for rectangular waveguide BPFs has been proved by targeting the same state-of-the-art frequency specifications as in [35]. The meandered filter will have a passband between 37.5 and 42.5 GHz, with in-band return loss better than 20 dB.…”

Section: A Q-band Meandered Bpfmentioning

confidence: 99%

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Rectangular Waveguide Filters With Meandered Topology

Teberio

Percaz

Arregui

et al. 2018

IEEE Trans. Microwave Theory Techn.

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In this paper, a new topology for rectangular waveguide band-pass and low-pass filters is presented. A simple, accurate and robust design technique for these novel meandered waveguide filters is provided. The proposed filters employ a concatenation of ±90º E-plane mitered bends (±90ºEMBs) with different heights and lengths whose dimensions are consecutively and independently calculated. Each ±90ºEMB satisfies a local target reflection coefficient along the device so that they can be calculated separately. The novel structures allow to drastically reduce the total length of the filters and to embed bends if desired, or even to provide routing capabilities. Furthermore, the new meandered topology allows the introduction of transmission zeros above the passband of the low-pass filter, which can be controlled by the free parameters of the ±90ºEMBs. A band-pass and a low-pass filter with meandered topology have been designed following the proposed novel technique. Measurements of the manufactured prototypes are also included to validate the novel topology and design technique, achieving excellent agreement with the simulated results.

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Section: Rectangular Waveguide Filtersmentioning

confidence: 98%

Section: Rectangular Waveguide Filtersmentioning

confidence: 99%

Section: A Meandered Bpfmentioning

confidence: 99%

Section: A Meandered Bpfmentioning

confidence: 99%

Section: A Q-band Meandered Bpfmentioning

confidence: 99%

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Rectangular Waveguide Filters With Meandered Topology

Teberio

Percaz

Arregui

et al. 2018

IEEE Trans. Microwave Theory Techn.

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Rapid yield optimization of miniaturized microwave passives by response features and variable-fidelity EM simulations

Pietrenko‐Dabrowska

Kozieł

2022

Sci Rep

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The operation of high-frequency devices, including microwave passive components, can be impaired by fabrication tolerances but also incomplete knowledge concerning operating conditions (temperature, input power levels) and material parameters (e.g., substrate permittivity). Although the accuracy of manufacturing processes is always limited, the effects of parameter deviations can be accounted for in advance at the design phase through optimization of suitably selected statistical performance figures. Perhaps the most popular one is the yield, which provides a straightforward assessment of the likelihood of fulfilling performance conditions imposed upon the system given the assumed deviations of designable parameters. The latter are typically quantified by means of probability distributions pertinent to the fabrication process. The fundamental obstacle of the yield-driven design is its high computational cost. The primary mitigation approach nowadays is the employment of surrogate modeling methods. Yet, a construction of reliable metamodels becomes problematic for systems featuring a large number of degrees of freedom. Our work proposes a technique for fast yield optimization of microwave passives, which relies on response feature technology as well as variable-fidelity simulation models. Utilization of response features enables efficient handling of issues related to the system response nonlinearities. Meanwhile, the incorporation of variable-resolution simulations allows for accelerating the yield estimation process, which translates into remarkably low overall cost of the optimizing the yield. Our approach is verified with the use of three microstrip couplers. Comprehensive benchmarking demonstrates its superiority in terms of computational efficiency over the state-of-the-art algorithms, whereas reliability is corroborated by electromagnetic-driven Monte Carlo simulations.

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Integrating multiple stubs in stepped‐impedance filter aiming for high selectivity

Sami

Laso

Lopetegi

et al. 2022

Electronics Letters

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A design technique to include multiple and fully-controlled transmission zeros (TZs) in the frequency response of rectangular waveguide commensurate-line stepped-impedance filters is presented in this letter. These bandpass filters (BPFs) are known for having reduced sensitivities against manufacturing inaccuracies and are composed of multiple waveguide sections. In order to improve their selectivity, 3λ g /4 and λ g /4-stubs are included to create multiple TZs around the passband. The proposed technique allows us to add multiple stubs in a single section and, therefore, only minor adjustments in the affected part of the filter are required, which simplifies the overall design process. The technique has been verified with a design example with four TZs (two on each side) near the passband.

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Waveguide band-pass filter with reduced sensitivity to fabrication tolerances for Q-band payloads

Cited by 15 publications

References 8 publications

Rectangular Waveguide Filters With Meandered Topology

Rectangular Waveguide Filters With Meandered Topology

Rapid yield optimization of miniaturized microwave passives by response features and variable-fidelity EM simulations

Integrating multiple stubs in stepped‐impedance filter aiming for high selectivity

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