Ferrodisc Microstrip Circulators & Isolators Features m@ Smail Size, Light Weight @ Low Cost @ Broad Offering @ Standard and Octave Bandwidths : @ MIiL-Temperature Magnetically Shielded Options Description Ferrodisc is a 3-port microstrip junction circulator constructed on a ferrite substrate. This is a true microstrip device using a single ferrite element with a circuit pattern on one face and the ground plane on the other. With a permanent magnet structure included on the ferrite substrate, a Ferrodisc is a complete, self-contained and fully functional ferrite circulator. Ferrodise devices can also be used in strip transmission line applications in a suitable mounting ar- rangement, When one port is suitably terminated, the device can be used as an isolator. Electrical Specifications Standard Octave Bandwidth Bandwidth 12.8-13.8 2 35 (8.9) .40(10.2) .025(.8) .275(7.0) .125(3.0) .10(2.5) = .125(3.3) .04(1) - $4658 140-145 2 .25(6.4) .30(7.6) .015(.5) 18 (4.6) .09(2.3) 09 (2.3) 102.5) .04(1) $4636 = $4635 145-155 2 .25(6.4) .30(7.6) 015 (.5) .18(4.6) .09(2.3) .09(2.3) .10(2.5) .04(1) $4633 $4643 155-175 2 .25(6.4) .30(7.6) 015 (5) 184.6) 092.3) .09(2.3) 102.5) .04(1) 846624 15.5-17.5 2 25(64) .30(7.6) 015.5) .17 (4.3) 092.3) 07 (1.8) 102.5) 04 (1) - 546414 Notes |. Insertion loss 0.5 dB, isolation 18 dB, VSWR 1.3:1 max. 3. Insertion loss |.0 dB, isolation 15 dB, VSWR 1.5:1 max. 2. Insertion loss 1.0 dB, isolation 18 dB VSWR 1.3:1. 4. Insertion loss 0.6 dB, isolation 18 dB, VSWR 1.5:1 max. * Standard circulation direction is clockwise. For reverse circulation and other frequency options, contact factory. Standard metallization is thin film. For thick film gold or thick film silver, contact factory. Circuit Mounting Details SEE DETAILS COVER ost og | upper | 4 mm) FAB | MAGNET. ae 7 FERRITE | nr 4 ae MICROSTRIP. 4) GOMER a SUBSTRATE . BASE - SEE DETAILS 7 PLATE: "A" Tok SEE DETAIL C =| [> LOWER OPTIONAL MAGNET THROUGH MICROSTRIP RECESS HOLE . CIRCUITS a ESS FIGURE 1. ho == [FREG.[MAX. RADIUS == = j [oat iam Sic YY FeaROoIse o05 [13 x, SUBSTRATE 5 - SUBSTRATE - c FERRODISC 00a | _,08 NOTE 1 = SSS OE. Mis THICKNESS rr DETAIL 8 SUFACE FINISH COPLANARITY 62 cir (1.6 wm NO BURRS sureace no MAX 7 FLATNESS BURAS OOtin. ~ 40.4254) X0MC \ FEARODISC ea |__\ GROUND PLANES INTERCONNECTION _,| PLATE 7 OTs noun GaP LFREQ. {| MAX. GAP _| PLANE [ GHz | in men be 0 025 OUTER EDGE OF RECESS 28 O10 25 8 MAY BE LOCATED SLIGHTLY a SHOULDER MIN UNDERNEATH MIC SUBSTRAT 18 003 -08 TO ALLOW LARGER CORNER RADIUS DETAIL A. DETAIL B. DETAIL C. Interconnection Gap & Copianarity Requirements NOTES: 1. Tab should be bent slightly to allow for thermal expansion effects. 2. Linear coefficient of thermal expansion for Ferrodise substrate 8-9 ppm/C. Specifications Subject ta Change Without Notice. M/A-COM Inc. / 1011 Pawtucket Boulevard, Lowell, MA 01853 USA a Telephone: 800-366-2266 4-250