title: Ultra-miniature coupled resonator filter with single-layer acoustic coupler.
abstract: Coupled resonator filters designed using a single-layer coupler require coupling materials with an acoustic impedance less than 5.0 MRayl. Carbon-doped oxide, with an acoustic impedance of 4.8 MRayl and an acoustic attenuation of 200 to 600 dB/cm at 1 GHz, can be used as a single-layer coupler to produce a competitive 2-stage coupled resonator filter for cellular handset applications in the gigahertz frequency range. The electrical response of our filter is superior to that of coupled resonator filters using a traditional acoustic mirror as the coupling element. We present an ultra-miniature 0.58 mm x 0.38 mm coupled resonator filter operating at a frequency of 2.15 GHz.
authors: Avago Technologies, Inc, San Jose, CA, USA. Tiberiu.Jamneala@avagotech.com
authors: Tiberiu
authors: T
authors: Jamneala
authors: Uli B
authors: UB
authors: Koelle
authors: Alexandre
authors: A
authors: Shirakawa
authors: Stephen R
authors: SR
authors: Gilbert
authors: Phil
authors: P
authors: Nikkel
authors: Chris
authors: C
authors: Feng
authors: Rich
authors: R
authors: Ruby
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008904:Miniaturization; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers