An FBAR Circulator
| Autor: | Suresh Sridaran, Mustafa Mert Torunbalci, Trevor J. Odelberg, Richard C. Ruby, Sunil A. Bhave |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Signal Processing (eess.SP) business.industry Circulator 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics Chip 01 natural sciences Resonator Quality (physics) Modulation 0103 physical sciences 0202 electrical engineering electronic engineering information engineering FOS: Electrical engineering electronic engineering information engineering Optoelectronics Electrical and Electronic Engineering Electrical Engineering and Systems Science - Signal Processing Piezoelectric coupling business 010301 acoustics Frequency modulation |
| DOI: | 10.48550/arxiv.1710.05003 |
| Popis: | This letter presents the experimental demonstration of a film bulk acoustic resonator (FBAR) circulator at 2.5 GHz. The circulator is based on spatiotemporal modulation of the series resonant frequency of FBARs using varactors and exhibits a large isolation of 76 dB at 2.5 GHz. The FBAR chip (0.25 mm2) consists of three identical FBARs connected in wye configuration. FBAR’s quality factor $(Q)$ of 1250 and the piezoelectric coupling coefficient ${k_{t}}^{2}$ of 3% relax the modulation requirements, achieving nonreciprocity with small modulation to RF ratio better than 1:800 (3 MHz: 2.5 GHz). |
| Databáze: | OpenAIRE |
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