IMK Series
FEATURES
ITEM
Insertion Loss (ports 1 - 2):
Coupling Range:
Standard Size:
Impedance:
Operating Frequency:
dB Flatness:
Operating Temperature:
Dissipated Power:
VSWR (main line):
Construction:
Attachment1:
Data Sheet | ver. B 1/2018
RoHS
NON-MAG
BONDABLE
Surface Mount Thick Film Coupler
SPECIFICATION
1dB or less (values greater than 18dB)
6 - 30dB
0.120” x 0.120” x 0.035” Max
50Ω
DC - 15GHz
See data on following pages
-55°C to 150°C
1W at 100°C baseplate temperature
1.2:1 depending on implementation
Thick film on alumina
Solder, epoxy or wirebond
½
½
½
½
Up to 30dB
1W Dissipated power
Low loss
Wideband
IMK Series Electrical Schematic
R
port 1
1
port 3
R
2
port 2
1. Recommended through line power should not exceed 6W.
(Required 50Ω impedances not shown)
Part
IMK2549
IMK2550
IMK2574
IMK2575
IMK2637
IMK2638
IMK2650
IMK2658
IMK2659
Direction
Right
Left
Right
Left
Right
Left
Left
Left
Left
Term Style
Wraparound
Wraparound
Wraparound
Wraparound
Wraparound
Wraparound
Wraparound
Wraparound
Wraparound
Term Material
PtAg
PtAg
Au (Inputs) PtAu (GND)
Au (Inputs) PtAu (GND)
PtAg w/ Sn62
PtAg w/ Sn62
PtAg w/ Sn96
ULR PtAg
ULR PtAg w/ Sn96
Impedance
C = 50Ω
C = 50Ω
C = 50Ω
C = 50Ω
C = 50Ω
C = 50Ω
C = 50Ω
C = 50Ω
C = 50Ω
Frequency
To 15GHz
To 15GHz
To 15GHz
To 15GHz
To 15GHz
To 15GHz
To 15GHz
To 15GHz
To 15GHz
Rated Power
1W Dissipated
1W Dissipated
1W Dissipated
1W Dissipated
1W Dissipated
1W Dissipated
1W Dissipated
1W Dissipated
1W Dissipated
Value Range
06 to 30dB
06 to 30dB
06 to 30dB
06 to 30dB
06 to 30dB
06 to 30dB
06 to 30dB
06 to 30dB
06 to 30dB
ORDERING INFORMATION
IMK2549-XXD0
Part Number
IMK2549
IMK2550
IMK2574
IMK2575
dB Value (06-30)
IMK2638
IMK2650
IMK2658
IMK2659
Packaging
B=Bulk, T=Tape and Reel
RoHS Compliant =
IMK2637
See the following pages for configurations and attachment options.
International Manufacturing Services, Inc.
(401) 683-9700 | www.ims-resistors.com
Page 1 of 3
Specifications subject to change without notice. | AS9100D - ISO9001:2015
IMK Series
IMK2549
Data Sheet | ver. B 1/2018
RoHS
NON-MAG
BONDABLE
Surface Mount Thick Film Coupler
Right Direction Version with PtAg Terminals for Solder or Epoxy Attachment
0.120”
IMK2637
Right Direction Version with Sn62 Solder Coated PtAg Terminals for Solder Attachment
0.120”
PORT 1
INPUT
PORT 2
THROUGH
0.120”
PORT 1
INPUT
PORT 2
THROUGH
0.120”
0.025”
0.025”
0.025”
0.025”
R1
0.055”
GND
0.055”
PORT 4
GND
R1
0.055”
GND
0.055”
PORT 4
GND
R2
PORT 3
COUPLED
0.030”
0.030”
R2
PORT 3
COUPLED
0.030”
0.030”
Front
0.035” MAX.
Back
Front
0.035” MAX.
Back
IMK2550
Left Direction Version with PtAg Terminals for Solder or Epoxy Attachment
0.120”
IMK2638
Left Direction Version with Sn62 Solder Coated PtAg Terminals for Solder Attachment
0.120”
PORT 2
THROUGH
PORT 1
INPUT
0.120”
PORT 2
THROUGH
PORT 1
INPUT
0.120”
0.025”
0.025”
0.025”
0.025”
R1
0.055”
GND
0.055”
PORT 3
COUPLED
R1
0.055”
GND
0.055”
PORT 3
COUPLED
R2
PORT 4
GND
0.030”
0.030”
R2
PORT 4
GND
0.030”
0.030”
Front
0.035” MAX.
Back
Front
0.035” MAX.
Back
IMK2574
IMK2650
0.120”
Right Direction Version for Wirebond
PORT 2
THROUGH
Left Direction Version with Sn96 Solder Coated PtAg Terminals for Solder Attachment
Same Dimensions as IMK2638
PORT 1
INPUT
0.025”
IMK2658
0.120”
R1
0.055”
GND
Left Direction Version with URL PtAg Terminals for Solder Attachment
Same Dimensions as IMK2638
PORT 4
GND
R2
PORT 3
COUPLED
0.030”
0.030”
IMK2659
Front
0.035” MAX.
Back
Left Direction Version with ULR PtAg w/ Sn96 Terminals for Solder Attachment
Same Dimensions as IMK2638
IMK2575
Left Direction Version for Wirebond
0.120”
PORT 2
THROUGH
PORT 1
INPUT
0.025”
R1
0.055”
GND
IMK2574 & IMK2575 feature
Single-Sided Gold Wirebondable
Terminals on Ports 1-3.
Port 4 (GND) Wraps to Solder or
Epoxyable Backplane.
Drawings are for illustrative purposes only.
Detailed dimensional information available from factory
PORT 3
COUPLED
R2
PORT 4
GND
0.030”
Front
0.035” MAX.
Back
0.120”
International Manufacturing Services, Inc.
(401) 683-9700 | www.ims-resistors.com
Page 2 of 3
Specifications subject to change without notice. | AS9100D - ISO9001:2015
IMK Series
CH2 S21 log 10 dB/ REF 0dB
Data Sheet | ver. B 1/2018
RoHS
NON-MAG
BONDABLE
Surface Mount Thick Film Coupler
IMK2549-30dB Coupling
1:-30.054 dB
0.0500 GHz
2:-22.404 dB
3.0000 GHz
3:-17.871 dB
6.0000 GHz
IMK2549-30dB Measured Insertion Loss
CH2 S21 log 10 dB/ REF 0dB
1:-0.2670 dB
0.0500 GHz
2:-0.6450 dB
3.0000 GHz
3:-0.9540 dB
6.0000 GHz
1
Cor
4:-10.182 dB
10.0000 GHz
5:-23.180 dB
Includes Fixture Loss
20.0000 GHz
START 0.0500 GHz
STOP 20.0000 GHz
CH1 S21 log 10 dB/ REF 0dB
4:-10.169 dB
10.0000 GHz
5:-28.829 dB
Includes Fixture Loss
20.0000 GHz
START 0.0500 GHz
STOP 20.0000 GHz
CH2 S21 log 5 dB/ REF 0dB
Cor
Cor
1
∆
2
∆
3
Includes Fixture Loss
START 0.0500 GHz
STOP 20.0000 GHz
START 0.0500 GHz
Includes Fixture Loss
5:-22.442 dB
20.0000 GHz
STOP 20.0000 GHz
Fixture loss was approximately 0.4dB at 6GHz, 0.8dB at 10GHz and 1.6dB at 15GHz. The above illustrations of corrected
data reflect performance of a IMK2549 coupler mounted in a matched coninuous 50Ω system of duroid construction and
SMA to microstrip transitions. Typically Insertion Loss improves with increasing nominal dB value.
Actual full-size response plots are available online at www.ims-resistors.com
International Manufacturing Services, Inc.
(401) 683-9700 | www.ims-resistors.com
Specifications subject to change without notice. | AS9100D - ISO9001:2015
∆
∆
4
∆
5
∆
∆
Cor
Smo
1
∆
2
∆
3
∆
4
∆
5
Cor
Del
4:-2.6810 dB
10.0000 GHz
5:-24.774 dB
Includes Fixture Loss
20.0000 GHz
START 0.0500 GHz
STOP 20.0000 GHz
IMK2549-13dB Coupling
1:-12.871 dB
0.0500 GHz
2:-11.852 dB
6.0000 GHz
3:-10.333 dB
10.0000 GHz
4:-12.684 dB
15.0000 GHz
5:-18.735 dB
20.0000 GHz
CH2 S21 log 5 dB/ REF 0dB
∆
∆
1
∆
2
∆
3
∆
4
Cor
Del
∆
5
4:-2.0000 dB
10.0000 GHz
5:-22.357 dB
Includes Fixture Loss
20.0000 GHz
START 0.0500 GHz
STOP 20.0000 GHz
IMK2549-20dB Coupling
1:-20.039 dB
0.0500 GHz
2:-18.072 dB
3.0000 GHz
3:-14.934 dB
6.0000 GHz
CH1 S21 log 10 dB/ REF 0dB
∆
∆
2
∆
3
∆
4
∆
5
IMK2549-20dB Measured Insertion Loss
1:-0.8110 dB
0.0500 GHz
2:-1.1760 dB
3.0000 GHz
3:-1.5680 dB
6.0000 GHz
1
∆
2
∆
3
∆
4
∆
5
IMK2549-13dB Measured Insertion Loss
1:-1.6740 dB
0.0500 GHz
2:-2.3050 dB
6.0000 GHz
3:-2.7360 dB
10.0000 GHz
4:-5.5380 dB
15.0000 GHz
1
∆
2
∆
3
∆
4
5
∆
Page 3 of 3
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