[ dimensions] unit : mm [ characteristics] ta =25 0 c [ pin assignment ] [ equivalent circuit ] [ recommended land size] unit : mm ehf fd1550, fd1735, fd1745 ehf fd1555, fd1736, fd1746 directional coupler fd1550 fd1735 fd1745 fd1555 fd1736 fd1746 1850- 1850- 1400- 800- 800- 800- 1950 1950 1600 1000 1000 1000 2 insertion loss (out) db 0.25 max 0.35 max 0.30 max 0.20 max 0.35 max 0.25 max 3 coupling (d. out) db 20+-1 14+-1 17+-2 20+-2 14+-2 17+-2 4 isolation (db) 26 min 20 min 23 min 28 min 20 min 25 min 5 v.s.w.r. 1.3 max 1.3 max 1.3 max 1.3 max 1.3 max 1.3 max 6 input power (w) 3 max 1.5 max 2 max 3 max 1.5 max 3 max specification item no. frequency (mhz) 1 3.2+-0.2 1.6+-0.2 0.65+-0.1 0.4 0.8 0.48 0.5 0.6 0.5 8-r0.16 1 2 8 7 6 5 4 3 1 2 8 7 6 5 4 3 0.8 2.4 0.45 0.35 0.8 0.8 no. 1 r out 2 r in 3 gnd 4 d. out 5 in 6 nu 7 nu 8 out nu : none use terminal in(5) d.out(4) out(8) r out(1) gnd(3) r in(2) r out(1) & r in(2) should be connected on the pcb
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