An Intrinsically Switchable Balanced Ferroelectric FBAR Filter at 2 GHz
| Autor: | Milad Zolfagharloo Koohi, Wenhao Peng, Amir Mortazawi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry 020206 networking & telecommunications 02 engineering and technology 01 natural sciences Ferroelectricity Resonator Filter (video) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Barium strontium titanate Ferroelectric thin films Optoelectronics Center frequency business 010301 acoustics |
| Zdroj: | 2020 IEEE/MTT-S International Microwave Symposium (IMS). |
| DOI: | 10.1109/ims30576.2020.9223799 |
| Popis: | An intrinsically switchable balanced lattice-ladder ferroelectric thin film bulk acoustic resonator (FBAR) filter is presented for the first time. A 1.5 stage balanced ladder-type filter and a 2-pole lattice-type filter with a center frequency at 2 GHz are first designed through the image parameter method. Subsequently, the filters are connected in series to form a ladder-lattice filter and fabricated based on ferroelectric barium strontium titanate (BST) FBARs. The measured two-section balanced filter provides a high out-of-band rejection and OFF-state isolation levels of more than 40 dB with a sharp roll-off. |
| Databáze: | OpenAIRE |
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