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Keywords = ESICL

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9 pages, 930 KiB  
Article
Highly Compact Through-Wire Microstrip to Empty Substrate Integrated Coaxial Line Transition
by Marcos D. Fernandez, José A. Ballesteros and Angel Belenguer
Appl. Sci. 2021, 11(15), 6885; https://doi.org/10.3390/app11156885 - 27 Jul 2021
Cited by 1 | Viewed by 2133
Abstract
Empty substrate integrated coaxial line (ESICL) technology preserves the many advantages of the substrate integrated technology waveguides, such as low cost, low profile, or integration in a printed circuit board (PCB); in addition, ESICL is non-dispersive and has low radiation. To date, only [...] Read more.
Empty substrate integrated coaxial line (ESICL) technology preserves the many advantages of the substrate integrated technology waveguides, such as low cost, low profile, or integration in a printed circuit board (PCB); in addition, ESICL is non-dispersive and has low radiation. To date, only two transitions have been proposed in the literature that connect the ESICL to classical planar lines such as grounded coplanar and microstrip. In both transitions, the feeding planar lines and the ESICL are built in the same substrate layer and they are based on transformed structures in the planar line, which must be in the central layer of the ESICL. These transitions also combine a lot of metallized and non-metallized parts, which increases the complexity of the manufacturing process. In this work, a new through-wire microstrip-to-ESICL transition is proposed. The feeding lines and the ESICL are implemented in different layers, so that the height of the ESICL can be independently chosen. In addition, it is a highly compact transition that does not require a transformer and can be freely rotated in its plane. This simplicity provides a high degree of versatility in the design phase, where there are only four variables that control the performance of the transition. Full article
(This article belongs to the Special Issue Substrate Integrated Waveguide (SIW) and Its Applications II)
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12 pages, 1807 KiB  
Article
Stop Band Continuous Profile Filter in Empty Substrate Integrated Coaxial Line
by Darío Gómez, Héctor Esteban, Angel Belenguer, Vicente E. Boria and Alejandro L. Borja
Appl. Sci. 2018, 8(11), 2176; https://doi.org/10.3390/app8112176 - 7 Nov 2018
Cited by 3 | Viewed by 3085
Abstract
Substrate integrated waveguides reduce the losses and increase the quality factor of resonators in communication filters when compared with traditional planar technologies, while maintaining their low-cost and low-profile characteristics. Empty substrate integrated waveguides go one step further, removing the dielectric of the substrate. [...] Read more.
Substrate integrated waveguides reduce the losses and increase the quality factor of resonators in communication filters when compared with traditional planar technologies, while maintaining their low-cost and low-profile characteristics. Empty substrate integrated waveguides go one step further, removing the dielectric of the substrate. One of these transmission lines is the empty substrate integrated coaxial line (ESICL), which has the advantage of being a two-conductor structure. Thus, it propagates a transversal electric and magnetic (TEM) mode, which reduces the dispersion and the bandwidth limitation of other one conductor empty substrate integrated waveguides. Continuous profile filters, at the cost of being long structures, are very easy to manufacture and design (usually no optimization is needed), and they are highly insensitive to manufacturing tolerances. In this work, a simple continuous profile filter, with a stop band response, is designed for the first time using novel ESICL technology. The influence of the design parameters on the insertion losses and fractional bandwidth is discussed. A prototype has been successfully manufactured and measured. A sensitivity analysis shows the high tolerance of the proposed stop band filter to manufacturing errors. Full article
(This article belongs to the Special Issue Substrate Integrated Waveguide (SIW) and Its Applications)
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