Analysis of the dispersion characteristics in periodic Substrate Integrated Waveguides

Coves, Á.; Blas, Á.A. San; Bronchalo, E.

doi:10.1016/j.aeue.2021.153914

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…10). In this way, as already shown in previous works [27], [28], the obtained glide-symmetric unit cell (with exactly the same parameters of the non-glide Reference Case) has nearly the same cutoff frequency (3.28 GHz instead of 3.23 GHz), but a much wider BW, that changes from 0.6 GHz in the non-glide configuration to 1.59 GHz in this case. Although the f c has also moved from 3.53 GHz to 4.08 GHz, the resulting FBW increases from 17% to 39%, a much higher value compared to other AFSIW filters presented in the technical literature, to the knowledge of the authors.…”

Section: Dispersion and Filtering Properties Of Glide-symmetric Air-f...supporting

confidence: 82%

“…This is, in fact, the main objective of this work. To this end, we make use of the results obtained in a previous work of the authors [28], where, similarly, the dispersion characteristics of waves propagating in periodic SIWs with different periodic configurations (with and without glide symmetry) were used to achieve a significant broadening of the first passband when glide symmetry was considered in the structure. However, in the aforementioned work, less attention was paid to both the achieved matching level in the passband and to the obtained rejection bands.…”

Section: Introductionmentioning

confidence: 99%

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Low-Loss Periodically Air-Filled Substrate Integrated Waveguide (SIW) Band-Pass Filters

García,

Coves,

Herraiz

et al. 2024

IEEE Access

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The electrical response of low-frequency band-pass filters based on periodic substrate integrated waveguide (SIW) technology typically shows permitted and forbidden frequency bands. Therefore, this type of filters can be designed using a conceptually very simple and efficient procedure based exclusively on the study of the dispersion properties of the periodic structure. In this paper, we go a step further with the design of a periodically air-filled SIW band-pass filter in which part of the dielectric substrate is removed to reduce insertion losses, and whose unit cell parameters, which are directly related to the center frequency (f c ) and bandwidth (BW) of the first passband, and also to the first stopband or bandgap (BG) of the structure, have been appropriately selected for filtering purposes, thus providing some useful design rules. Furthermore, we apply the concept of glide symmetry for achieving a much larger fractional bandwidth (FBW) than that obtained in conventional air-filled SIW filters found in the technical literature. Finite implementations of both periodic structures with and without glide symmetry have been analyzed, showing their filtering response for validation purposes. Additionally, to overcome the matching level restrictions in the resulting air-filled periodic SIWs, a microstrip-to-SIW transition including a novel coupling iris is proposed. A prototype of the proposed air-filled glide-symmetric periodic SIW filter has been manufactured and experimentally validated, illustrating the potential of this technique to obtain large FBWs that can not be achieved in conventional air-filled SIW filters. The proposed filter proves to be a good candidate for millimeter wave applications. INDEX TERMSBand-pass filters, substrate integrated waveguide (SIW), glide symmetry, microstrip transition. Recently, several modified SIWs have been proposed in which the dielectric substrate has been partially or fully removed to improve the quality factor [13]-[18], due to the reduction of the dielectric losses. Different implementations of such modified SIWs can be found in the technical literature, known as modified SIW (MSIW) [13], hollow SIW (HSIW) [14], air-filled SIW (AFSIW) [15], [19], dielectricless SIW (DSIW) [17] and empty SIW (ESIW) [18]. Such modified SIWs have been successfully used to implement

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Section: Dispersion and Filtering Properties Of Glide-symmetric Air-f...supporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Low-Loss Periodically Air-Filled Substrate Integrated Waveguide (SIW) Band-Pass Filters

García,

Coves,

Herraiz

et al. 2024

IEEE Access

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show abstract

“…These SIW oscillators have some benefits such as low fabrication cost, appropriate in mass production, easily integrating with typical planar circuits, miniaturized, high quality-factor, low loss, and suitable for MMICs. 18,19 In this study, three different X-band SIW resonators are designed, fabricated, and measured. These SIWs are used as a frequency stabilizer element.…”

Section: Introductionmentioning

confidence: 99%

“…By using SIW resonators as parallel‐feedback or series‐feedback schemes, high quality‐factor can be presented and the SPN oscillator applications can be introduced. These SIW oscillators have some benefits such as low fabrication cost, appropriate in mass production, easily integrating with typical planar circuits, miniaturized, high quality‐factor, low loss, and suitable for MMICs 18,19 …”

Section: Introductionmentioning

confidence: 99%

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

Varcheh

Rezaei

Kiani

2022

Micro & Optical Tech Letters

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This study denotes a procedure of a small phase noise (SPN) oscillator employing three different substrate integrated waveguide (SIW) resonators as a frequency stabilization‐component. The SIW resonator as modifying phase noise (PN) is investigated and branchline coupler in the feedback loop is presented. The design technique to attain SPN usage for optimized efficiency is proposed. Then, three different X‐band SIW oscillators using a packaged GaAs FET transistor are planned. Due to the PN and compacting, the miniaturized conventional SIW (MCSIW) oscillator is selected. This MCSIW oscillator operates at 8.15 GHz, mentions a PN of −169 dBc/Hz at 1‐MHz frequency‐offset.

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Low phase noise oscillator employing miniaturized shielded-EMSIW resonators embedded with CSRRs structure

Wang

Zong

2022

AEU - International Journal of Electronics and Communications

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Analysis of the dispersion characteristics in periodic Substrate Integrated Waveguides

Cited by 6 publications

References 26 publications

Low-Loss Periodically Air-Filled Substrate Integrated Waveguide (SIW) Band-Pass Filters

Low-Loss Periodically Air-Filled Substrate Integrated Waveguide (SIW) Band-Pass Filters

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

Low phase noise oscillator employing miniaturized shielded-EMSIW resonators embedded with CSRRs structure

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