Versatile, Error-Tolerant, and Easy to Manufacture Through-Wire Microstrip-to-ESIW Transition

Belenguer, Ángel; Ballesteros, José A.; Fernández, Marcos D.; Esteban, H.; Boria, Vicente E.

doi:10.1109/tmtt.2020.2984474

Cited by 15 publications

(29 citation statements)

References 18 publications

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“…The proposed transition is inspired by those described in [4] and [5]. In this case the feeding line will inject power into the circuit by the central layer of the FESIW; that layer presents a portion of the waveguide whose width is just the dimension of the gap g, see Fig.…”

Section: Coplanar-to-fesiw Transition Designmentioning

confidence: 99%

“…A suite of several ESIW devices were designed and manufactured [3] at different frequency bands: filters of different orders and quality factor, directional couplers, antennas, etc. In parallel, several designs of transitions have been made [3] [4], essentially based on the microstrip feeding line, to improve the power injection into the waveguide: three versions of a tapered transition, a taperless transition, a multilayer transition and the newest and versatile throughwire transition.…”

Section: Introductionmentioning

confidence: 99%

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Folded Empty Substrate Integrated Waveguide With a Robust Transition to Grounded Coplanar Waveguide in the Ku Band

et al. 2021

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The benefits of empty substrate integrated waveguide (ESIW) are already well-known and contrasted in the literature. Different variations of transitions are available to maximize the power injection in that structure. Besides, several topological variations of the ESIW have also been proposed, such as the ridge ESIW, which enlarges the monomode bandwidth at the cost of higher losses and larger crosssection area. This paper presents a new variation of topology: the folded-ESIW, that halves the width of the original ESIW waveguide and maintains the cross-section area with good performance indexes and a similar bandwidth. A discussion is made about the feasibility of this novel topology and a new transition is presented with a high degree of robustness and a minimum electrical length. To validate and prove this new proposal, a back-to-back prototype has been designed, manufactured and measured, with results so promising that give access to new design strategies in the ESIW field.INDEX TERMS Folded, empty substrate integrated waveguide, transition, multilayer, compact circuits.

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Section: Coplanar-to-fesiw Transition Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Folded Empty Substrate Integrated Waveguide With a Robust Transition to Grounded Coplanar Waveguide in the Ku Band

et al. 2021

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“…The introduction of two through holes in the design reported in Reference 1 at the junction of 50‐Ω microstrip line and the tapered section further improves the input matching level by at least 5 dB 5 . In Reference 6, microstrip to ESIW transition is made through metallic wire that connects the microstrip and the bottom ground plane of the ESIW. This technique improves the matching but makes the design sensitive to the dimensional error of the wire.…”

Section: Introductionmentioning

confidence: 99%

A modified microstrip to empty substrate integrated waveguide transition

Khan

Kahar

Mandal

2021

Int J RF Mic Comp-Aid Eng

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In this article, a new design of a microstrip to empty substrate integrated waveguide with reduced fabrication complexity is presented. A tapered microstrip section is used for mode and impedance matching. The guiding medium below the transition area is air. The proposed design is validated both in X and K‐band. Finally, a prototype of such back‐to‐back transition is fabricated for X‐band operation. The measured results show that the insertion loss of the back‐to‐back transition is less than 1 dB with return loss better than 15 dB over 7.2–11.2 GHz, whereas the return loss is better than 10 dB over the entire X‐band. The leakage from the transitions is also studied.

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“…In order to connect these microwave components with planar technologies, such as microstrip, a transition from microstrip to ESIW is necessary. Several transition design approaches have been proposed, such as a dielectric taper inside the ESIW and a taper in the microstrip line [10], a widened waveguide section at the beginning of the ESIW together with a taper in the microstrip line [11], a through-wire [12], and a tapered artificial dielectric slab matrix [13]. All these transitions present a usable bandwidth limitation, due both to the bandwidth of the fundamental mode in the ESIW, and to the frequency range in which the transition provides a good impedance matching between the microstrip and the ESIW.…”

Section: Introductionmentioning

confidence: 99%

Microstrip to Double Ridge Empty Substrate Integrated Waveguide Transitions Based on Exponential and Superelliptical Dielectric Taper

et al. 2021

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The Empty Substrate Integrated Waveguides (ESIW) maintain the advantages of the Substrate Integrated waveguide (SIW) (i.e. low-volume, low profile, lightweight, easy manufacturing, and integration in a planar circuit board), and present lower losses and higher quality factors in resonators due to the propagation of the fields through air, instead of through lossy dielectric as in SIW. The operational (monomode) bandwidth of the ESIW can be increased with the Single Ridge ESIW (SRESIW). However, the bandwidth can be further increased with the Double Ridge ESIW (DRESIW). In this paper, a brief study of possible DRESIW geometries has been performed, and two transitions from microstrip line (MS) to DRESIW with a dielectric taper geometry based on different equations are proposed. The new wideband transitions present simulated return losses in back-to-back configurations greater than 20 dB in more than a 95% fractional bandwidth. The transition that presents a better compromise between return losses, bandwidth and ease of fabrication is manufactured. The measured return and insertion losses are better than 19.7 dB and 1.5 dB, respectively, in a 96.4% fractional bandwidth.

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Versatile, Error-Tolerant, and Easy to Manufacture Through-Wire Microstrip-to-ESIW Transition

Cited by 15 publications

References 18 publications

Folded Empty Substrate Integrated Waveguide With a Robust Transition to Grounded Coplanar Waveguide in the Ku Band

Folded Empty Substrate Integrated Waveguide With a Robust Transition to Grounded Coplanar Waveguide in the Ku Band

A modified microstrip to empty substrate integrated waveguide transition

Microstrip to Double Ridge Empty Substrate Integrated Waveguide Transitions Based on Exponential and Superelliptical Dielectric Taper

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