SAW Device WFA18B0037KB For High Precision Industry ■ Features ● IF SAW filter for digital terrestrial broadcasting mini-satellite. ● Compact. ● With a low-band ripple. ● Excellent steepness characteristics. ■ Specifications Model WFA18B0037KB Item min. typ. Nominal frequency : f0 (MHz) 37.15 Minimum loss : IL (dB) 1 dB bandwidth : (Minimum loss) : − 27.8 30 Lower (MHz) − -2.91 -2.79 Upper (MHz) +2.79 +2.91 − − 0.5 1.0 f0−15 to f0−3.2 MHz (dB) 30 33 − f0+3.2 to f0+15 MHz (dB) 30 33 − In-band deviation (Max. f0±2.79 MHz)(dB) Guaranteed attenuation (Minimum loss standard) Operating temperature range (°C) −10 to +60 Terminating impedance (Ω) 50 (with matching) ■ Dimensions ■ Characteristics 10±0.5 12.5 max mm 43±0.5 φ0.45±0.1 35±0.3 4 7.5±0.3 CH1 A/R LOG MAG REF -27.816 dB Pin connections 1.000 dB/ GND INPUT OUTPUT CH1 CENTER(MHz) 37.1500 SPAN(MHz) 10.000 [Out-of-band characteristics] CH2 A/R LOG MAG REF -27.804 dB 2 [In-band characteristics] 9 max Others 1 3 3.75±0.3 5.5±0.75 (0.5) 45.5 max 1 max. 10.000 dB/ 3 5 ■ Matching Circuit IN 50Ω 1 SAW Lp1 Ls2 3 Cp1 OUT 50Ω CH2 -2- CENTER(MHz) 37.1500 SPAN(MHz) 50.000 13B_1227_WFA18B0037KB_e