Ridge gap waveguide to microstrip line transition with perforated substrate
Notice bibliographique
Résumé
Summary form only given. The ridge gap waveguides is one of the highly recommended guided structures in high frequency applications. This is due to its ability to carry the signal with low losses. The signal pass through this structure in the form of Quasi TEM mode, which grantee less dispersion compared to other structures working in the same operating band with ridge gap waveguide, like SIW. One of the major drawbacks of the ridge gap waveguide is related to the used excitation technique. It is always difficult in fabrication and in many cases, it is responsible for limiting the possible bandwidth of the structure. One simple and straightforward idea is to connect the ridge gap waveguide to one of the standard 50Ω lines, such as Microstriop lines or Coplaner waveguides. This work is focused on the Microstrip line case. It is required that the ridge waveguide is directly connected with the 50Ω Microstrip line. The direct connection will have a certain level of mismatch and the reflection increases as the dielectric constant of the microstrip line substrate increases. As a first step of the transition design, a low relative permitivity substrate is chosen. This initially reduces the reflection occurs at the transition. The second step of the transition design is to insert two sections of matching between the microstrip line and the ridge gap waveguide with the help of lower dielectric constants substrates than those used in the microstrip line. The substrates with these lower dielectric constants can be achieved by using the same substrate and apply perforation. Controlling the perforation density will adjust the relative permitivity of the substrate at the required value to achieve matching. Using the previously described technique, the ridge gap waveguide can be attached directly to a 50Ω microstrip line. Connecting the microsrtip line to one of the standard coaxial connectors, like (SMA, 2.4mm, 3.5mm or 1.85mm), is a well-established connection. This provides a very easy procedure for ridge gap waveguide measurements. It is worth to mention that the fabrication process for such a transition is very simple as it is a two dimensions printed structure. To eliminate the radiation of this transition, an extension of the periodic cells is placed in the microstrip line side. Within the microstrip line part, the periodic cells will introduce some sort of packaging to get rid of leakage due to radiation. This extension also provides more smooth transition between the ridge gap waveguide and the microstrip line packaged with similar periodic structure. One important point that should be taken into consideration is that the substrate thickness of the microstrip line must be exactly the same as the gap height in the ridge gap structure.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».