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| Directional Coupler 1.71-1.99 GHz DC18-73 Features s Low Cost s Low Profile s Available in Small SOT-6 Lead Package s Tape & Reel Description The DC18-73 is a monolithic directional coupler tailored to the 1.71-1.99 GHz band. It offers low loss, good isolation, good input/output matching and exceptional coupling repeatability. It is available in the SOT-6 lead surface mount package. Electrical Specifications at 25C Parameter Frequency Insertion Loss Isolation Input VSWR Output VSWR Coupling Coupled Port VSWR 19.8 30 Min. 1.71 0.2 38 1.1:1 1.1:1 18.8 1.2:1 1.3:1 1.3:1 17.8 1.4:1 dB Typ. Max. 1.99 0.3 Unit GHz dB dB Pin Out Block Diagram Coupled DC18 1 2 3 GND GND COUPLED OUT GND IN Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A 6 5 4 Out In 1 Directional Coupler 1.71-1.99 GHz DC18-73 Typical Performance Data -0.0 -0.1 -0.2 -0.3 -0.4 -0.5 1.70 1.5 1.4 Insertion Loss (dB) Output VSWR 1.75 1.80 1.85 1.90 1.95 2.00 1.3 1.2 1.1 1.0 1.70 1.75 1.80 1.85 1.90 1.95 2.00 Frequency (GHz) Frequency (GHz) Insertion Loss vs. Frequency 0 1.5 Output VSWR vs. Frequency Coupled Port VSWR -10 1.4 1.3 1.2 1.1 1.0 1.70 Isolation (dB) -20 -30 -40 1.70 1.75 1.80 1.85 1.90 1.95 2.00 1.75 1.80 1.85 1.90 1.95 2.00 Frequency (GHz) Frequency (GHz) Isolation vs. Frequency 1.5 1.4 Input VSWR 1.3 1.2 1.1 1.0 1.70 Coupled Port VSWR vs. Frequency -16 -17 Coupling (dB) -18 -19 -20 -21 -22 1.70 1.75 1.80 1.85 1.90 1.95 2.00 1.75 1.80 1.85 1.90 1.95 2.00 Frequency (GHz) Frequency (GHz) Input VSWR vs. Frequency Coupling vs. Frequency 2 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A Directional Coupler 1.71-1.99 GHz DC18-73 Absolute Maximum Ratings Characteristic Input Power1 Value 4.0 W CW SOT-6 0.074 (1.90 mm REF.) PIN 6 PIN 1 INDICATOR PIN 1 0.020 (0.51 mm) 0.014 (0.350 mm) 0.057 (1.45 mm) 0.035 (0.90 mm) 0.126 (3.20 mm) 0.087 (2.20 mm) 0.071 (1.80 mm) 0.052 (1.30 mm) Operating Temperature Storage Temperature 1. When operating with a 2.0:1 maximum VSWR on all ports. Recommended Board Layout 0.018 TYP. z, y ,,,,, ,,,,, ,,, ,,, ,,, ,,,,, ,,,,, DC18 0.039 TYP. -40C to +85C -65C to +150C 0.037 (0.95 mm) REF. 0.012 (0.30 mm) TYP. 0.014 (0.26 mm) 0.004 (0.10 mm) 5.0 1 0.015 TYP. ,,,,, ,,,,, ,,, ,,, ,,, ,,, ,,, ,,, 0.075 0.020 0.006 (0.15 mm) 0.000 (0.00 mm) 5.0 1 0.122 (3.10 mm) 0.106 (2.70 mm) 0.022 (0.61 mm) 0.004 (0.10 mm) 0.020 DIA. VIA 3 PLACES Material is 10 mil FR4 Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com Specifications subject to change without notice. 3/99A 3 |
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