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A Substrate-Integrated Evanescent-Mode Waveguide Filter With Nonresonating Node in Low-Temperature Co-Fired Ceramic.
- Source :
-
IEEE Transactions on Microwave Theory & Techniques . Oct2010, Vol. 58 Issue 10, p2654-2662. 9p. - Publication Year :
- 2010
-
Abstract
- A cross-coupled substrate-integrated evanescent-mode waveguide filter is proposed with a quasi-elliptic frequency response. It is realized with a coplanar waveguide as a nonresonating node to provide an equivalent negative coupling coefficient. The filter prototype is developed with folded and ridge substrate-integrated waveguides (SIWs) in low-temperature co-fired ceramic. Since evanescent-mode and cross-coupling techniques are used in the design of filters, about 90% area reduction and more than 60% volume reduction are achieved, in comparison with conventional planar cavity-coupled SIW filters. Their unloaded Q factor is also improved. In particular, the spurious suppression characteristic of the direct-coupled evanescent-mode waveguide filter is kept by the cross-coupled filter with the nonresonating node structure. All these merits are demonstrated numerically, as well as experimentally, with good agreement obtained between the measured and simulated S-parameters. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 58
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 54502555
- Full Text :
- https://doi.org/10.1109/TMTT.2010.2065290