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Title [LETTER] Feasibility Study of Small-sized FBAR-based Bandpass Filter Covering Digital Dividend Band for LTE Services
Authors (Munhyuk Yim) ; (Buil Jeon) ; (Giwan Yoon)
DOI https://doi.org/10.5573/JSTS.2020.20.5.479
Page pp.479-484
ISSN 1598-1657
Keywords FBAR; digital dividend band; wideband; Bragg reflector; stacked crystal filter
Abstract In this paper, we present a feasibility study of a small-sized film bulk acoustic wave resonator (FBAR) bandpass filter (BPF) that covers the digital dividend band (698-862 MHz) for Long Term Evolution (LTE) services. The FBAR-based bandpass filter of 590×340 ?m2 is much smaller than the conventional filters of cavity, interdigital or discrete component configurations. This feasibility study will be very useful for realizing even more advanced LTE BPFs for wideband communications applications below 1 GHz.