CSDZ-5BH-1.9G

CSDZ-5BH-1.9G DIRECTIONAL COUPLER REV: 002, 03/18/08 TECHNICAL DESCRIPTION FEATURES • 1.7 - 2.0 GHz • LOW LOSS • HIGH DIRECTIVITY • EXCELLENT COUPLING ACCURACY • SURFACE MOUNT RoHS Compliant The Multi-Mix® CSDZ series provides 5 dB coupling at 1.7 - 2.0 GHz. The CSDZ series features accurate coupling factors, low VSWR, and high directivity. Very low insertion loss and high power handling capability make this series ideal for use in base station power amplifiers particularly in the main loop of the feedforward amplifiers. The CSDZ series is also ideal for use in RF sampling networks and control circuitry in high power transmitters. CSDZ directional couplers are based on fusion bonded multilayer stripline structures. The fusion bonding process yields homogeneous monolithic dielectric structures with reliability, ruggedness, and electrical and thermal performance that are superior to conventional adhesive bonding techniques. GENERAL SPECIFICATIONS FREQUENCY RANGE (GHz) 1.7 - 2.0 INSERTION LOSS (dB MAX) 0.15 MEAN COUPLING (dB) 5 ± 0.5 VSWR (MAX, ALL PORTS) 1.25:1 FREQUENCY SENSITIVITY (dB MAX) ± 0.15 DIRECTIVITY ( dB MIN) 18 AVERAGE POWER (WATTS, MAX.) 450 RF INTERFACE OPERATING TEMPERATURE Leadless Surface Mount -55° TO +95° C PACKAGE OUTLINE 0.134 [3.40] 1.000 [25.40] PORT 2 PORT 1 0.500 [12.70] CSDZ-5BH-1.9G PORT 3 0.080 [2.03] 0.050 [1.27] PORT 4 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: MMFM@merrimacind.com / www.merrimacind.com TYPICAL PERFORMANCE CSDZ-5BH-1.9G Coupling -4 -4.2 -4.4 Coupling (dB) -4.6 -4.8 -5 -5.2 -5.4 -5.6 -5.8 -6 1.7 1.75 1.8 1.85 Freq (Ghz) 1.9 1.95 2 Insertion Loss (dB) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1.7 1.75 1.8 Insertion Loss 1.85 Freq (GHz) 1.9 1.95 2 VSWR 1.3 1.25 Directivity (dB) VSWR (dB) 1.2 1.15 1.1 1.05 1.7 1.75 1.8 1.85 Freq (GHz) 1.9 1.95 2 0 -5 -10 -15 -20 -25 -30 1.7 1.75 1.8 Directivity 1.85 Freq (Ghz) 1.9 1.95 2 MOUNTING CONFIGURATION 50 OHM LINE .032 DIELECTRIC THICKNESS ER= 3.38 .845 .055 TYP. .505 .345 .080 Ground plane of unit should be soldered to ground plane of circuit board for optimum performance .074 .074 GROUND PLANE TRUTH TABLE 1 1 2 3 4 Input Isolated Output Coupled 2 Isolated Input Coupled Output 3 Output Coupled Input Isolated 4 Coupled Output Isolated Input Merrimac Industries / 41 Fairfield Place, West Caldwell, NJ 07006 Tel: 1.888.434.MMFM / Fax: 973.882.5990 / Email: MMFM@merrimacind.com / www.merrimacind.com