Thin-Film Directional Couplers DB0805 3dB 90° Couplers GENERAL DESCRIPTION ITF TECHNOLOGY The ITF SMD 3dB 90° Coupler is based on thin-film multilayer technology. The technology provides a miniature part with excellent high frequency performance and rugged construction for reliable automatic assembly. The ITF 3dB 90° Coupler is offered in a variety of frequency bands compatible with various types of high frequency wireless systems. Recommended Pad Layout Dimensions 2.24 (0.088) 0.70 (0.028) mm (inches) APPLICATIONS FEATURES • Balanced Amplifiers and Signal Distribution in Mobile Communications • • • • DIMENSIONS: Bottom View millimeters (inches) 2.03±0.10 (0.080±0.004) 1.55±0.10 (0.061±0.004) 0.98±0.15 (0.037±0.006) 0.56±0.25 (0.022±0.010) 0.35±0.15 (0.014±0.006) L W T GROUND Miniature 0805 size Low I. Loss High Isolation Power Handling: 10W RF CW • Surface Mountable • Supplied on Tape and Reel • Operating Temperature 1.76 0.64 (0.069) (0.025) A B B L W T 3 A TERMINALS (Top View) Orientation in Tape 0.15 (0.006) TYP. 50 OHM IN OUT1 50 OHM OUT2 IN OUT1 Code Letter Marking OUT2 ELECTRICAL PARAMETERS* Part Number** DB0805A0880ASTR DB0805A0915ASTR DB0805A0967ASTR DB0805A1350ASTR DB0805A1650ASTR DB0805A1800ASTR DB0805A1850ASTR DB0805A1900ASTR DB0805A1950ASTR DB0805A2140ASTR DB0805A2325ASTR Frequency FO [MHz] 880±30 915±30 967±30 1350±50 1650±50 1800±50 1850±50 1900±50 1950±50 2140±50 2325±50 I. Loss @ FO [dB] 0.35 0.35 0.35 0.35 0.35 0.30 0.30 0.30 0.25 0.25 0.25 Phase Balance Code Letter [deg] max. Marking 3 Y 3 V 3 V 3 C 3 F 3 F 3 K 3 K 3 K 3 L 3 T **LEAD FREE TERMINATION PART NUMBERS: DB0805AxxxxASTR LEAD-FREE COMPATIBLE COMPONENT *With Recommended Pad Layout NOTE: Additional Frequencies Available Upon Request 87 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 880 ± 30MHz DB0805A0880ASTR -3.0 I. Loss 1 dB -3.2 -3.4 I. Loss 2 -3.6 3 -3.8 850 865 880 895 910 Frequency (MHz) -10 -12 -14 -16 R. Loss dB -18 -20 Isolation -22 -24 -26 -28 -30 850 855 880 Frequency (MHz) 88 905 930 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 915 ± 30MHz DB0805A0915ASTR -2.8 -3.0 -3.2 dB I. Loss 1 -3.4 I. Loss 2 3 -3.6 -3.8 885 900 915 930 945 Frequency (MHz) -10 -12 -14 -16 dB -18 -20 Isolation R. Loss -22 -24 -26 -28 -30 865 890 915 940 965 Frequency (MHz) 89 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 967± 30MHz DB0805A0967ASTR -2.8 -3.0 -3.2 dB I. Loss 1 -3.4 I. Loss 2 -3.6 3 -3.8 937 952 967 982 997 Frequency (MHz) -10 -12 -14 -16 dB -18 -20 -22 R. Loss Isolation -24 -26 -28 -30 917 942 967 Frequency (MHz) 90 992 1017 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1350 ± 50MHz DB0805A1350ASTR -3.0 -3.2 dB I. Loss 1 -3.4 I. Loss 2 -3.6 3 -3.8 1300 1350 1400 Frequency (MHz) -10 -12 -14 -16 Isolation dB -18 -20 R. Loss -22 -24 -26 -28 -30 1300 1350 1400 Frequency (MHz) 91 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1650 ± 50MHz DB0805A1650ASTR -2.8 -3.0 dB I. Loss 1 -3.2 -3.4 I. Loss 2 3 -3.6 1550 1600 1650 1700 1750 1700 1750 Frequency (MHz) -10 -12 -14 -16 dB -18 Isolation R. Loss -20 -22 -24 -26 -28 -30 1550 1600 1650 Frequency (MHz) 92 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1800 ± 50MHz DB0805A1800ASTR -2.8 -3.0 dB I. Loss 1 -3.2 I. Loss 2 -3.4 3 -3.6 1750 1775 1800 1825 1850 Frequency (MHz) -10 -12 -14 -16 dB -18 -20 -22 Isolation R. Loss -24 -26 -28 -30 1750 1775 1800 1825 1850 Frequency (MHz) 93 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1850 ± 50MHz DB0805A1850ASTR -2.8 -3.0 dB I. Loss 1 -3.2 I. Loss 2 -3.4 3 -3.6 1800 1825 1850 1875 1900 Frequency (MHz) -10 -12 -14 -16 dB -18 R. Loss Isolation -20 -22 -24 -26 -28 -30 1800 1825 1850 Frequency (MHz) 94 1875 1900 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1900 ± 50MHz DB0805A1900ASTR -3.0 I. Loss 1 dB -3.2 I. Loss 2 -3.4 3 -3.6 1850 1875 1900 1925 1950 Frequency (MHz) -10 -12 -14 -16 dB -18 -20 Isolation R. Loss -22 -24 -26 -28 -30 1850 1875 1900 1925 1950 Frequency (MHz) 95 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1950 ± 50MHz DB0805A1950ASTR -2.8 -3.0 dB I. Loss 1 -3.2 I. Loss 2 -3.4 3 -3.6 1900 1925 1950 1975 2000 Frequency (MHz) -10 -12 -14 -16 dB -18 R. Loss -20 Isolation -22 -24 -26 -28 -30 1900 1925 1950 Frequency (MHz) 96 1975 2000 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 2140 ± 50MHz DB0805A2140ASTR -2.6 -2.8 dB -3.0 I. Loss 1 -3.2 I. Loss 2 -3.4 -3.6 3 -3.8 2040 2090 2140 2190 2240 Frequency (MHz) -10 -12 -14 -16 dB -18 R. Loss -20 -22 Isolation -24 -26 -28 -30 2140 2090 2140 2190 2240 Frequency (MHz) 97 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 2325 ± 50MHz DB0805A2325ASTR -3.0 -3.1 I. Loss 1 dB -3.2 -3.3 I. Loss 2 -3.4 3 -3.5 2275 2300 2325 2350 2375 Frequency (MHz) -10 -12 -14 -16 R. Loss dB -18 Isolation -20 -22 -24 -26 -28 -30 2275 2300 2325 Frequency (MHz) 98 2350 2375 Thin-Film Directional Couplers DB0805 3dB 90° Test Jigs GENERAL DESCRIPTION These jigs are designed for testing the DB0805 3dB 90° Couplers using a Vector Network Analyzer. They consist of a dielectric substrate, having 50Ω microstrips as conducting lines and a bottom ground plane located at a distance of 0.254mm from the microstrips. The substrate used is Neltec’s NH9338ST0254C1BC. The connectors are SMA type (female), ‘Johnson Components Inc.’ Product P/N: 142-0701-841. Both a measurement jig and a calibration jig are provided. The calibration jig is designed for a full 2-port calibration, and consists of an open line, short line and through line. LOAD calibration can be done by a 50Ω SMA termination. MEASUREMENT PROCEDURE When measuring a component, it can be either soldered or pressed using a non-metallic stick until all four ports touch the appropriate pads. Set the VNA to the relevant frequency band. Connect the VNA using a 10dB attenuator on the jig terminal connected to port 2. Follow the VNA’s instruction manual and use the calibration jig to perform a full 2-port calibration in the required bandwidths. Place the coupler on the measurement jig as follows: Input (Coupler) 50Ω (Coupler) ➜ Connector 1 (Jig) ➜ Connector 2 (Jig) 3 Output 1 (Coupler) ➜ Connector 3 (Jig) Output 2 (Coupler) ➜ Connector 4 (Jig) To measure R. Loss and I. Loss 1 connect: Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ Port 2 (VNA) Connector 2 (Jig) ➜ 50Ω Connector 4 (Jig) ➜ 50Ω To measure R. Loss and I. Loss 2 connect: Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ 50Ω Connector 2 (Jig) ➜ 50Ω Connector 4 (Jig) ➜ Port 2 (VNA) To measure Isolation connect: Connector 1 (Jig) ➜ 50Ω Connector 2 (Jig) ➜ 50Ω Connector 3 (Jig) ➜ Port 1 (VNA) Connector 4 (Jig) ➜ Port 2 (VNA) Calibration Jig Measurement Jig Connector 1 Load & Through Connector Johnson P/N 142-0701-841 Connector 2 Load & Through Connector 4 Connector 3 Short Line to GND Open Line 99