CSD-20N-0.75G DIRECTIONAL COUPLER REV: 001, 03/29/07 TECHNICAL DESCRIPTION FEATURES • 0.5 - 1.0 GHz • LOW LOSS • HIGH DIRECTIVITY • EXCELLENT COUPLING ACCURACY • SURFACE MOUNT The Multi-Mix® CSD-20N-0.75G provides a 20 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-20 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 MEAN COUPLING VSWR (MAX, ALL PORTS) 20 ± 1.0 1.22:1 FREQUENCY RANGE MHz INSERTION LOSS (dB MAX) 500 - 1000 0.2 FREQUENCY SNESITIVITY (dB MAX) DIRECTIVITY (dB MIN) POWER (AVG. CW WATTS) ± 1.0 16 100 OPERATING TEMPERATURE -55° - +85° C PACKAGE OUTLINE / TAPE AND REEL ORIENTATION DIRECTION OF FEED P0 .650 .402 PORT 2 PAD 1 P 0 PORT 1 "A" 1 "A" B0 W 2 .192 3 .061 .480 K 1 PORT 3 MARKED SIDE UP PORT 4 A0 SECTION "A"-"A" W P1 P0 A0 B0 K0 ENGLISH (in) 0.9449 0.6299 0.1575 0.5126 0.6665 0.09448 METRIC (mm) 24.00 16.00 4.00 13.02 16.93 2.4 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: [email protected] / www.merrimacind.com Insertion Loss Coupling -18 1 -18.5 0.75 Insertion Loss(dB) Coupling (dB) -19 -19.5 -20 -20.5 -21 -22 500 0.5 0.25 0 -0.25 -0.5 -0.75 -21.5 550 600 650 700 750 800 850 900 950 -1 500 1000 550 600 650 700 Frequency (MHz) Port 2 800 850 900 950 1000 850 900 950 1000 Directivity Port 3 0 Port 4 1.4 -5 1.35 Directivity (dB) -10 1.3 1.25 1.2 1.15 -15 -20 -25 -30 1.1 -35 1.05 1 500 750 Frequency (MHz) VSWR Port 1 VSWR CSD-20N-0.75G TYPICAL PERFORMANCE 550 600 650 700 750 800 Frequency (MHz) 850 900 950 -40 500 1000 550 600 650 700 750 800 Frequency (MHz) MOUNTING CONFIGURATION 50 ohm line .030 delectric thickness ER= .537 .034 .453 .380 .063 .050 .068 Ground plane of unit should be soldered to ground plane of circuit board for optimum performance Ground plane 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.merrimacind.com