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 mm (inches) 2.24 (0.088) 0.70 (0.028) APPLICATIONS FEATURES • Balanced Amplifiers and Signal Distribution in Mobile Communications • • • • DIMENSIONS: Miniature 0805 size Low I. Loss High Isolation Power Handling: 10W RF CW • Surface Mountable • Supplied on Tape and Reel • Operating Temperature -40°C to +85°C 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 A 1.76 0.64 (0.069) (0.025) B B L W 3 T 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* Frequency FO [MHz] DB0805A0880AWTR 880±30 DB0805A0915AWTR 915±30 DB0805A0967AWTR 967±30 DB0805A1350AWTR 1350±50 DB0805A1650AWTR 1650±50 DB0805A1800AWTR 1800±50 DB0805A1850AWTR 1850±50 DB0805A1900AWTR 1900±50 DB0805A1950AWTR 1950±50 DB0805A2140AWTR 2140±50 DB0805A2325AWTR 2325±50 *With Recommended Pad Layout Part Number Important: 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 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 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) 54 905 930 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 -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) 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 -3.8 937 952 967 982 997 Frequency (MHz) -10 -12 -14 -16 dB -18 -20 -22 R. Loss Isolation -24 -26 -28 -30 917 942 967 Frequency (MHz) 56 992 1017 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1350 ± 50MHz DB0805A1350AWTR -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) 57 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1650 ± 50MHz DB0805A1650AWTR -2.8 -3.0 dB I. Loss 1 -3.2 -3.4 3 I. Loss 2 -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) 58 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1800 ± 50MHz DB0805A1800AWTR -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) 59 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1850 ± 50MHz DB0805A1850AWTR -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) 60 1875 1900 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1900 ± 50MHz DB0805A1900AWTR -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) 61 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 1950 ± 50MHz DB0805A1950AWTR -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) 62 1975 2000 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 2140 ± 50MHz DB0805A2140AWTR -2.6 -2.8 dB -3.0 I. Loss 1 -3.2 I. Loss 2 -3.4 3 -3.6 -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) 63 Thin-Film Directional Couplers DB0805 3dB 90° Couplers 2325 ± 50MHz DB0805A2325AWTR -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) 64 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. 3 Place the coupler on the measurement jig as follows: Input (Coupler) 50Ω (Coupler) ➜ Connector 1 (Jig) ➜ Connector 2 (Jig) 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 65