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| 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. APPLICATIONS * Balanced Amplifiers and Signal Distribution in Mobile Communications FEATURES * * * * Miniature 0805 size Low I. Loss High Isolation Power Handling: 10W RF CW * Surface Mountable * Supplied on Tape and Reel * Operating Temperature -40C to +85C Recommended Pad Layout Dimensions 2.24 (0.088) 0.70 (0.028) mm (inches) DIMENSIONS: millimeters (inches) L W T 2.030.10 (0.0800.004) 1.550.10 (0.0610.004) 0.980.15 (0.0370.006) 0.560.25 (0.0220.010) 0.350.15 (0.0140.006) Bottom View L T B W 3 A GROUND 1.76 0.64 (0.069) (0.025) A B TERMINALS (Top View) Orientation in Tape 0.15 (0.006) TYP. 50 OHM OUT1 50 OHM OUT1 Code Letter Marking OUT2 IN OUT2 IN ELECTRICAL PARAMETERS* Frequency FO [MHz] DB0805A0880AWTR 88030 DB0805A0915AWTR 91530 DB0805A0967AWTR 96730 DB0805A1350AWTR 135050 DB0805A1650AWTR 165050 DB0805A1800AWTR 180050 DB0805A1850AWTR 185050 DB0805A1900AWTR 190050 DB0805A1950AWTR 195050 DB0805A2140AWTR 214050 DB0805A2325AWTR 232550 *With Recommended Pad Layout Part Number 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 Important: All intermediate frequencies within the indicated range are readily available. 53 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 880 30MHz DB0805A0880AWTR -3.0 I. Loss 1 -3.2 dB -3.4 I. Loss 2 -3.6 3 -3.8 850 865 880 Frequency (MHz) 895 910 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 850 855 880 Frequency (MHz) 905 930 Isolation R. Loss 54 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 915 30MHz DB0805A0915AWTR -2.8 -3.0 -3.2 dB I. Loss 1 -3.4 I. Loss 2 -3.6 3 900 915 Frequency (MHz) 930 945 -3.8 885 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 865 890 915 Frequency (MHz) 940 965 Isolation R. Loss 55 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 967 30MHz DB0805A0967AWTR -2.8 -3.0 -3.2 dB I. Loss 1 -3.4 I. Loss 2 3 -3.6 -3.8 937 952 967 Frequency (MHz) 982 997 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 917 R. Loss Isolation 942 967 Frequency (MHz) 992 1017 56 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 1350 50MHz DB0805A1350AWTR -3.0 -3.2 I. Loss 1 dB -3.4 I. Loss 2 -3.6 3 -3.8 1300 1350 Frequency (MHz) 1400 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 1300 1350 Frequency (MHz) 1400 R. Loss Isolation 57 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 1650 50MHz DB0805A1650AWTR -2.8 -3.0 I. Loss 1 dB -3.2 -3.4 3 -3.6 1550 I. Loss 2 1600 1650 Frequency (MHz) 1700 1750 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 1550 1600 1650 Frequency (MHz) 1700 1750 Isolation R. Loss 58 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 1800 50MHz DB0805A1800AWTR -2.8 -3.0 I. Loss 1 dB -3.2 I. Loss 2 -3.4 3 -3.6 1750 1775 1800 Frequency (MHz) 1825 1850 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 1750 Isolation R. Loss 1775 1800 Frequency (MHz) 1825 1850 59 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 1850 50MHz DB0805A1850AWTR -2.8 -3.0 I. Loss 1 dB -3.2 I. Loss 2 -3.4 3 -3.6 1800 1825 1850 Frequency (MHz) 1875 1900 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 1800 R. Loss Isolation 1825 1850 Frequency (MHz) 1875 1900 60 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 1900 50MHz DB0805A1900AWTR -3.0 I. Loss 1 -3.2 dB I. Loss 2 -3.4 3 -3.6 1850 1875 1900 Frequency (MHz) 1925 1950 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 1850 Isolation R. Loss 1875 1900 Frequency (MHz) 1925 1950 61 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 1950 50MHz DB0805A1950AWTR -2.8 -3.0 I. Loss 1 dB -3.2 I. Loss 2 -3.4 3 -3.6 1900 1925 1950 Frequency (MHz) 1975 2000 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 1900 R. Loss Isolation 1925 1950 Frequency (MHz) 1975 2000 62 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 2140 50MHz DB0805A2140AWTR -2.6 -2.8 -3.0 dB I. Loss 1 -3.2 I. Loss 2 -3.4 -3.6 -3.8 2040 3 2090 2140 Frequency (MHz) 2190 2240 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 2140 Isolation R. Loss 2090 2140 Frequency (MHz) 2190 2240 63 Thin-Film Directional Couplers DB0805 3dB 90 Couplers 2325 50MHz DB0805A2325AWTR -3.0 -3.1 I. Loss 1 -3.2 dB -3.3 I. Loss 2 3 -3.4 -3.5 2275 2300 2325 Frequency (MHz) 2350 2375 -10 -12 -14 -16 -18 dB -20 -22 -24 -26 -28 -30 2275 Isolation R. Loss 2300 2325 Frequency (MHz) 2350 2375 64 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 50 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 50 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) 50 (Coupler) Connector 1 (Jig) Connector 2 (Jig) Output 1 (Coupler) Connector 3 (Jig) Output 2 (Coupler) Connector 4 (Jig) 3 To measure R. Loss and I. Loss 1 connect: Connector 1 (Jig) Port 1 (VNA) Connector 3 (Jig) Port 2 (VNA) Connector 2 (Jig) 50 Connector 4 (Jig) 50 To measure R. Loss and I. Loss 2 connect: Connector 1 (Jig) Port 1 (VNA) Connector 3 (Jig) 50 Connector 2 (Jig) 50 Connector 4 (Jig) Port 2 (VNA) To measure Isolation connect: Connector 1 (Jig) 50 Connector 2 (Jig) 50 Connector 3 (Jig) Port 1 (VNA) Connector 4 (Jig) Port 2 (VNA) Measurement Jig Connector 1 Calibration Jig Load & Through Connector Johnson P/N 142-0701-841 Connector 2 Load & Through Open Line Connector 4 Short Line to GND Connector 3 65 |
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