Preprint Article Version 1 This version is not peer-reviewed

Stop Band Continuous Profile Filter in Empty Substrate Integrated Coaxial Line

Version 1 : Received: 5 October 2018 / Approved: 7 October 2018 / Online: 7 October 2018 (11:41:48 CEST)

A peer-reviewed article of this Preprint also exists.

Gómez, D.; Esteban, H.; Belenguer, A.; Boria, V.E.; Borja, A.L. Stop Band Continuous Profile Filter in Empty Substrate Integrated Coaxial Line. Appl. Sci. 2018, 8, 2176. Gómez, D.; Esteban, H.; Belenguer, A.; Boria, V.E.; Borja, A.L. Stop Band Continuous Profile Filter in Empty Substrate Integrated Coaxial Line. Appl. Sci. 2018, 8, 2176.

Journal reference: Appl. Sci. 2018, 8, 2176
DOI: 10.3390/app8112176

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. One of these transmission lines is the empty substrate integrated coaxial line (ESICL), which adds the advantage of being a two conductor structure. Thus, it propagates a TEM mode, which reduces the dispersion and the bandwith 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 in the 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.

Subject Areas

empty substrate integrated waveguides; empty substrate integrated coaxial line; ESICL; continuous profile filters; stop band filters

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