An Intrinsically Switchable Balanced Ferroelectric FBAR Filter at 2 GHz

Koohi, Milad Zolfagharloo; Peng, Wenhao; Mortazawi, Amir

doi:10.1109/ims30576.2020.9223799

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…Circuit schematic of the six-stage six-pole/twelve-TZ BPF alongside with its ideally-simulated S-parameters. [13], [22] only allow for reconfigurable transfer function states and the BPF in [12] facilitates discrete BW tuning. Lastly, the AWLR BPF concept in [19] is based on mechanically-tunable capacitors.…”

Section: Experimental Validationmentioning

confidence: 99%

Acoustic Wave Resonator-Based Bandpass Filters With Continuously Tunable Fractional Bandwidth

Nasser

Psychogiou

2023

IEEE Trans. Circuits Syst. II

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A new class of acoustic-wave resonator-based bandpass filters (BPFs) with continuously tunable fractional bandwidth (FBW) are presented. They are based on cascaded multi-resonant stages of hybridly-integrated surface acoustic wave (SAW) resonators with lumped element (LE) components. Each stage comprises one SAW resonator and one or more LE resonators that contribute to the overall transfer function to one pole and two transmission zeros (TZs). As such highly-selective quasi-elliptic transfer functions with N poles, 2N TZs and enhanced FBW can be created for two series and N-2 parallel stages. It is shown that by reconfiguring the resonant frequency of the LE resonators, continuously-tunable FBWs can be obtained. The operating principles of the multi-stage concept are demonstrated through design examples of multi-stage prototypes. The concept has been validated at 916.6 MHz through a fourpole/eight-TZ BPF with tunable BW between 0.63-1.32 MHz (i.e., FBW=0.57 -1.32kt 2 ), minimum in-band insertion loss (IL) 3.9-2.3 dB (Qeff =7700-6000) and out-of-band isolation > 27 dB. Index Terms-Acoustic wave resonator (AWR), high quality factor (Q), tunable bandpass filter (BPF), kt 2 -enhancement.

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