A planar and tunable bandpass filter on a ferrite substrate with integrated windings

Eyad A. Arabi, Ahad Syed, Atif Shamim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Tunable Filters that are based on ferrite materials are often biased by external magnets or coils which are large and bulky. In this work a completely planar, CPW-based bandpass filter is presented with integrated windings. Due to these windings the size of the filter is only 26mm × 34mm × 0.38mm which is orders of magnitude smaller than the traditional designs with external windings. The filter is realized by electroplating of Copper over seed layers of Titanium and Gold over a YIG substrate. The fabricated filter achieves a tunability of 3.4% without any external magnets or coils. A good insertion loss of 2.3 dBs and rejection greater than 50 dBs have been obtained. To the best of the authors knowledge, this design is the first ferrite-based design that is completely planar and self-biased.
Original languageEnglish (US)
Title of host publication2015 IEEE MTT-S International Microwave Symposium
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781479982752
DOIs
StatePublished - May 2015

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