CSD-30BH-2.5G DIRECTIONAL COUPLER REV: 003, 09/08/04 TECHNICAL DESCRIPTION FEATURES • 2.0 - 3.0 GHz • LOW LOSS • HIGH DIRECTIVITY • EXCELLENT COUPLING ACCURACY • SURFACE MOUNT APPLICATIONS • WCDMA BASE STATION RF SUBSYSTEMS • SATCOM • MMDS • WLAN The Multi-Mix® CSD series provides a 30 dB coupling with low insertion loss, low VSWR, and high directivity. Accurate coupling factors make this series ideal for use in power amplifiers and RF signal distribution and processing equipment. CSD - 30 directional couplers are fusion bonded multilayer stripline devices. The fusion bonding process yields a homogeneous monolithic dielectric structure with reliability, ruggedness, and electrical performance that is superior to conventional adhesive bonding techniques. GENERAL SPECIFICATIONS FREQUENCY RANGE (MHz) INSERTION LOSS (dB MAX) MEAN COUPLING (dB) VSWR (MAX, ALL PORTS) 2000 - 3000 0.13 30 ± 1.8 1.17:1 FREQUENCY SENSITIVITY (dB MAX) DIRECTIVITY ( dB MIN) AVERAGE POWER (WATTS, MAX.) RF INTERFACE OPERATING TEMPERATURE ± 0.75 14 450 Leadless Surface Mount -55° TO +85° C PACKAGE OUTLINE CSD-30-BH-2.5G THE MULTI-MIX MICROTECHNOLOGY® GROUP IS ISO 9001:2000 REGISTERED U.S. Patent 6,099,677 and other Patents Pending. Merrimac Industries / 41 Fairfield Place, West Caldwell, NJ 07006 Tel: 1.888.434.MMFM / Fax: 973.882.5990 / Email: [email protected] / www.Multi-Mix.com Coupling Insertion Loss 0.5 -20 0.4 -22 0.3 Insertion Loss (dB) -24 Coupling (dB) -26 -28 -30 -32 -34 0.1 0 -0.1 -0.2 -0.4 -38 -0.5 -40 2000 0.2 -0.3 -36 2100 2200 2300 2400 2500 2600 Frequency (MHz) 2700 2800 2900 2000 3000 2100 2200 2300 Port 2 2400 2500 2600 2700 2800 2900 3000 2600 2700 2800 2900 3000 Frequency (MHz) Directivity VSWR Port 1 Port 3 0 Port 4 1.3 -5 Directivity (dB) 1.25 1.2 VSWR CSD-30BH-2.5G TYPICAL PERFORMANCE 1.15 -10 -15 1.1 -20 1.05 -25 1 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 -30 2000 3000 2100 2200 Frequency (MHz) 2300 2400 2500 Frequency (MHz) MOUNTING CONFIGURATION Ground plane of unit should be soldered to ground plane of circuit board for optimum performance TRUTH TABLE 1 2 3 4 1 Input Output Isolated Coupled 2 Output Input Coupled Isolated 3 Isolated Coupled Input Output 4 Coupled Isolated Output Input Merrimac Industries / 41 Fairfield Place, West Caldwell, NJ 07006 Tel: 1.888.434.MMFM / Fax: 973.882.5990 / Email: [email protected] / www.Multi-Mix.com