Laboratoire Des Science Et Techniques Of Linformation

Sainte-Foy-lès-Lyon, France

Laboratoire Des Science Et Techniques Of Linformation

Sainte-Foy-lès-Lyon, France
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Le Coq M.,Laboratoire Des Science Et Techniques Of Linformation | Rius E.,Laboratoire Des Science Et Techniques Of Linformation | Favennec J.-F.,Laboratoire Des Science Et Techniques Of Linformation | Quendo C.,Laboratoire Des Science Et Techniques Of Linformation | And 5 more authors.
IEEE Transactions on Components, Packaging and Manufacturing Technology | Year: 2015

This paper introduces an effective way to build efficient miniature C-band filters using high-permittivity ceramics. The objective was to evaluate the feasibility of such filters using commercial electromagnetic simulators and a conventional fabrication process. For the demonstration, the substrate integrated waveguide (SIW) technology was chosen. Compared with planar solutions, this configuration offers good quality factors and good electrical performances as a consequence. However, its dimensions are large, leading to unacceptably large footprints for many applications. The solution proposed in this paper is based on a ceramic substrate with a permittivity of 90, which allowed us to work with shorter wavelengths. In comparison with a standard alumina substrate (permittivity εr = 9.9), this approach makes it possible to reduce the footprint up to nine times. Two prototypes were realized on a Trans-Tech ceramic substrate (thickness = 635 μm, εr = 90, and tanδ = 9·10-4). The first prototype is a folded sixth-order SIW filter including a cross coupling combining coplanar waveguide probes and a thin microstrip line on an InterVia substrate. The second one is a folded eighth-order SIW filter without cross couplings. Here, we compare the sixth-order prototype with an identical one built on alumina. The eighth-order filter, which had no alumina counterpart, is a potentially useful alternative for situations where complex technological steps must be avoided. © 2015 IEEE.


Potelon B.,Laboratoire Des Science Et Techniques Of Linformation | Quendo C.,Laboratoire Des Science Et Techniques Of Linformation | Favennec J.-F.,Laboratoire Des Science Et Techniques Of Linformation | Rius E.,Laboratoire Des Science Et Techniques Of Linformation | And 2 more authors.
IEEE Transactions on Microwave Theory and Techniques | Year: 2010

This paper presents a new concept of bandpass resonator based upon the association of planar and substrate integrated waveguide technologies. The selectivity, control of rejection, and ease of design are significantly enhanced by the hybrid planar waveguide resonator compared to the classical substrate integrated waveguide resonators. The hybrid planar waveguide resonator is built from the association of two elements: a substrate integrated circular cavity and a transmission line. When these two elements are connected together, they permit the occurrence of the pole and the transmission zero of the hybrid planar waveguide resonator. This paper describes and discusses the design procedure for $n$ th-order filters. This procedure relies on an iterative process between synthesis equations and a graph. Electrical performances and particularly Q factor are brought to the fore through the realization of a single resonator. The design procedure is then validated through the realization and measurement of a C-band second-order filter. Finally, a third-order filter in the Ku-band is designed, realized, and measured. © 2006 IEEE.

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