IMK Series
Features
• Up to 30dB of coupling
• 1W Dissipated Power
• Low Loss
• Wideband
Item
Insertion Loss (ports 1 - 2):
Coupling Range:
Standard Size:
Impedance:
Operating Frequency:
dB Flatness:
Operating Temperature:
Dissipated Power:
VSWR (main line):
Construction:
Attachment:
Specification
Surface Mount Thick Film Coupler
Thick Film
1dB or less (values greater than 18dB)
6 - 30dB
0.120” x 0.120” x 0.035” MAX
50Ω
DC - 20GHz
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*
Recommended Through Line Power Should Not Exceed 6W
Ordering Information
IMK2549-XXD0
PN Prefix*
IMK2549
IMK2550
IMK2574
IMK2575
IMK2637
IMK2638
dB Value (06-30)
* See next page for configurations and attachment options
IMK Series Electrical Schematic
port 1
R
1
port 3
R
2
port 2
(required 50Ω impedances not shown)
50 Schoolhouse Ln., Portsmouth RI 02871 USA
Tel (401) 683-9700 • Fax (401) 683-5571 • e-mail: ims@ims-resistors.com • www.ims-resistors.com
IMK ver. A 2/2017. Specifications subject to change without notice. • ISO9001:2008
International Manufacturing Services, Inc.
IMK2549 - Forward Version with PtAg Terminals for Solder or Epoxy Attachment
0.120”
PORT 1
INPUT
PORT 2
THROUGH
0.120”
0.025”
0.025”
R1
0.055”
GND
0.055”
PORT 4
GND
R2
PORT 3
COUPLED
0.035” MAX.
0.030”
0.030”
IMK2550 - Reverse Version with PtAg Terminals for Solder or Epoxy Attachment
0.120”
Front
Back
PORT 2
THROUGH
PORT 1
INPUT
0.120”
0.025”
0.025”
R1
0.055”
GND
0.055”
PORT 3
COUPLED
R2
PORT 4
GND
0.035” MAX.
0.030”
0.030”
IMK2637 - Forward Version with Sn62 Solder Coated PtAg Terminals for Solder Attachment
0.120”
Front
Back
PORT 1
INPUT
PORT 2
THROUGH
0.120”
0.025”
0.025”
R1
0.055”
GND
0.055”
PORT 4
GND
R2
PORT 3
COUPLED
0.035” MAX.
0.030”
0.030”
IMK2638 - Reverse Version with Sn62 Solder Coated PtAg Terminals for Solder Attachment
0.120”
Front
Back
PORT 2
THROUGH
PORT 1
INPUT
0.120”
0.025”
0.025”
R1
0.055”
GND
0.055”
PORT 3
COUPLED
R2
PORT 4
GND
0.035” MAX.
0.030”
0.030”
Front
IMK2574 - Forward Version for Wirebond
PORT 1
INPUT
PORT 2
THROUGH
0.025”
Back
0.120”
R1
0.055”
0.120”
GND
PORT 4
GND
R2
PORT 3
COUPLED
0.030”
0.035” MAX.
0.030”
Front
Back
0.120”
IMK2575 - Reverse Version for Wirebond
PORT 2
THROUGH
PORT 1
INPUT
0.025”
R1
0.055”
GND
PORT 3
COUPLED
R2
PORT 4
GND
0.030”
0.035” MAX.
IMK2574 & IMK2575 feature
Single-Sided Gold Wirebondable
Terminals on Ports 1-3.
Port 4 (GND) Wraps to Solder or
Epoxyable Backplane.
Front
Back
DRAWINGS ARE FOR ILLUSTRATIVE PURPOSES ONLY.
DETAILED DIMENSIONAL INFORMATION AVAILABLE FROM FACTORY
Specifications subject to change without notice.
0.120”
IMK2549-30dB Coupling
CH2 S21 log 10 dB/ REF 0dB
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
∆
4
∆
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
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
Cor
Smo
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
Includes Fixture Loss
START 0.0500 GHz
STOP 20.0000 GHz
Includes Fixture Loss
START 0.0500 GHz
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
Specifications subject to change without notice.
∆
∆
1
∆
2
∆
3
∆
4
∆
5
∆
∆
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
IMK2549-13dB Measured Insertion Loss
CH2 S21 log 5 dB/ REF 0dB
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
∆
4
5
∆
∆
1
∆
2
∆
3
∆
4
Cor
Del
∆
5
IMK2549-20dB Coupling
1:-20.039 dB
0.0500 GHz
2:-18.072 dB
3.0000 GHz
3:-14.934 dB
6.0000 GHz
IMK2549-20dB Measured Insertion Loss
CH1 S21 log 10 dB/ REF 0dB
1:-0.8110 dB
0.0500 GHz
2:-1.1760 dB
3.0000 GHz
3:-1.5680 dB
6.0000 GHz
∆
4
∆
5
∆
1
1
∆
2
∆
3
∆
2
∆
3
1
∆
2
∆
3
RF/Wirelessly
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