frequency range (mhz) insertion loss (db max) mean coupling (db) vswr (max, all ports) 1700 - 2000 0.15 20 0.5 1.15:1 frequency sensitivity (db max) directivity ( db min) average power (watts, max.) rf interface operating temperature 0.15 23 200 leadless surface mount -55 to +95 c directional coupler fea tures ? 1700 - 2000 mhz ? low loss ? high directivity ? excellent coupling accuracy ? surface mount the multi-mix ? csdz series provides 20 db coupling at 1900 mhz. the csdz series features accurate coupling factors, low vswr, and high directivity. very low insertion loss and high power handling capa- bility 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 cir- cuitry 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. csdz-20h-1.9g technical description rev: 001, 12/09/05 the multi-mix microtechnology ? group is iso 9001:2000 registered merrimac industries / 41 fairfield place, west caldwell, nj 07006 tel: 1.888.434.mmfm / fax: 973.882.5990 / email: crm@merrimacind.com / www.merrimacind.com u.s. patent 6,099,677 and other patents pending. general specifications package outline/ tape & reel orientation .060 [1.524] .560 [14.224] .350 [8.890] .059 [1.499] .040 [1.016] typ. typ. port 1 port 2 port 4 port 3 csdz-20h-1.9g p p w k b 1 0 0 0 english (in) w 1.2598 0.6299 p 10 p 0.1575 0 a 0.3598 b 0 0 k metric (mm) 32.00 16.00 4.00 9.14 14.47 2.03 0.5697 0.0799 direction of feed "a" "a" section "a"-"a" a 0 pad 1 marked side up
typical performance csdz-20h-1.9g merrimac industries / 41 fairfield place, west caldwell, nj 07006 tel: 1.888.434.mmfm / fax: 973.882.5990 / email: crm@merrimacind.com / www.merrimacind.com 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 0.050 [1.28] 0.068 [1.73] ground plane 0.447 [11.35] 50 ohm line .032 dielectric thickness er= 3.38 0.351 [8.91] 0.0630 [1.60] 0.250 [6.35] ground plane of unit should be soldered to ground plane of circuit board for optimum performance ground vias plated thru 0.034 typ. [0.86] mounting configuration coupling -22 -21.5 -21 -20.5 -20 -19.5 -19 -18.5 -18 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 2000 frequency (mhz) coupling (db) insertion loss -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 2000 frequency (mhz) insertion loss(db) vswr 1 1.1 1.2 1.3 1.4 1.5 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 2000 frequency (mhz) vswr port 1 port 2 port 3 port 4 directivity -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 2000 frequency (mhz) directivity (db) isolation
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