Model 11303-20 Rev. A Directional Couplers 20 dB Description The 11303-20 is a low profile 20dB directional coupler in an easy to use surface mount package designed for the 380 to 520 MHz bandwidth. The 11303-20 is ideal for power and frequency detection as well as VSWR monitoring and can be used in most high power designs. Parts have been subjected to rigorous qualification testing and units are 100% tested. They are manufactured using materials with x and y thermal expansion coefficients compatible with common substrates such as FR4, G-10 and polyamide. ELECTRICAL SPECIFICATIONS** Features: * * * * * * * 380 - 520 MHz Low loss High Directivity Surface Mountable Tape And Reel Convenient Package 100% Tested Frequency Mean Coupling Insertion Loss VSWR Freq. Sensitivity MHz dB dB Max Max:1 dB Max 380 - 520 20.5 1.5 0.30 1.2 0.8 Directivity Power Handling JC dB Min Watts C / Watt C 18 50 3.7 -55 to +85 Operating Temp. **Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 nominal impedance. Specifications subject to change without notice. Outline Drawing .073.008 [1.850.20] .650.010 [16.510.25] Pin 1 Bottom View (Far-side) Side View Top View (Near-side) Pin 2 Pin 2 .024.004 TYP [0.610.10] Pin 1 .480.010 [12.190.25] GND Pin 4 .050.008 [1.270.20] GND Denotes Array Number Pin 3 Dimensions are in Inches [Millimeters] 11303-20 Rev A Mechanical Outline Pin 3 .050.008 [1.270.20] Pin 4 Part Is Symmetric About All Axis Available on Tape and Reel For Pick and Place Manufacturing. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Model 11303-20 Rev. A Typical Performance: 300 MHz. to 600 MHz. Coupling 11303-20 Return Loss 11303-20 -10 -20 -20 Return Loss (dB) Coupling (dB) -20.5 -21 -21.5 -22 -30 -40 -50 -22.5 -23 300 350 400 450 500 550 -60 300 600 350 400 450 500 550 600 550 600 Frequency (MHz) Frequency (MHz) Directivity 11303-20 Transmission Loss 11303-20 -10 0 -0.1 Transmission Loss (dB) Directivity (dB) -20 -30 -40 -0.2 -0.3 -0.4 -50 300 -0.5 350 400 450 500 550 600 300 350 400 Frequency (MHz) 450 500 Frequency (MHz) Pin Configuration Mounting Footprint To ensure proper electrical and thermal performance there must be a ground plane with 100% solder connection underneath the part Part Is Symmetric About All Axis Multiple plated thru holes to ground .550 [13.97] .380 [9.65] .034 TYP [0.86] .063 SQ TYP [1.60] Dimensions are in Inches [Millimeters] 11303-20 Rev A Mounting Footprint USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Available on Tape and Reel For Pick and Place Manufacturing. 50 Transmission Line