ims
Tel (401) 683-9700
Fax (401) 683-5571
e-mail: ims@ims-resistors.com
http://www.ims-resistors.com
International
Manufacturing
Services, Inc.
IMK Series Surface Mount
Thick Film Coupler
impossible made simple
Ver 2 1/2011 Specifications Subject to Change Without Notice
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IMK Series Specifications
Insertion Loss (ports 1 - 2): 1dB or less (values greater than 18dB)
Coupling Range: 6 - 30dB
Standard Size: 0.120” x 0.120” x 0.035” MAX
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Operating Frequency: DC - 20GHz
dB Flatness: See data on following pages
Operating Temperature: -55°C to 150°C
Dissipated Power: 1W at 100°C Baseplate Temperature
VSWR (main line): 1.2:1 depending on implementation
Construction: Thick Film on Alumina
Attachment: Solder, Epoxy or Wirebond*
Recommended Through Line Power Should Not Exceed 6W
To
30dB
1W
Dissipated Power
Low Loss
Wideband
ims IMK Series Resistive Couplers provide the sensing function over a
broad range of frequencies in a compact, easy to use component.
With alumina construction, insertion loss is comparable to more
complicated frequency sensitive couplers.
As with IMS attenuators, the IMK Series is engineered to optimize performance
in two ways:
1) Resistive areas are constant and are specified for the lowest dB value
ensuring that all couplers easily handle the incident RF power.
2) High inductance lines minimize ground path leakage and maintain low through loss.
The above constraints assure repeatability, reliability and optimal performance. The design and
construction of these couplers is simplified to minimize cost and maximize efficiency.
Ordering Information
IMK2549-XXDB
dB Value (06-30)
PN Prefix*
IMK2549
IMK2550
IMK2574
IMK2575
IMK Series Electrical Schematic
R
port 3
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port 1
port 2
1
R2
* See next page for configurations and attachment options
Tel (401) 683-9700
Fax (401) 683-5571
e-mail: ims@ims-resistors.com
http://www.ims-resistors.com
International
Manufacturing
Services, Inc.
Visit us on the web!
www.ims-resistors.com
0.120”
PORT 4
GND
PORT 1
INPUT
PORT 2
THROUGH
PORT 3
COUPLED
0.120”
0.025”
0.030”
0.055”
0.025”
0.030”
0.055”
0.035” MAX.
R1
R2
Front Back
IMK2549 Dimensions - Forward Version for Solder or Epoxy Attachment
0.120”
PORT 4
GND
PORT 2
THROUGH
PORT 3
COUPLED
0.120”
0.025”
0.030”
0.055”
0.025”
0.030”
0.055”
0.035” MAX.
PORT 1
INPUT
Front Back
IMK2550 Dimensions - Reverse Version for Solder or Epoxy Attachment
IMK2574 Dimensions - Forward Version for Wirebond
0.120”
PORT 4
GND
PORT 1
INPUT
PORT 2
THROUGH
PORT 3
COUPLED
0.120”
0.025”
0.030”
0.055”
0.030”
0.035” MAX.
Front Back
R1
R2
GND
GND
R1
R2
GND
IMK2575 Dimensions - Reverse Version for Wirebond
0.120”
0.025”
0.030”
0.055”
0.035” MAX.
Front Back
R1
R2
GND
0.120”
PORT 4
GND
PORT 2
THROUGH
PORT 3
COUPLED
PORT 1
INPUT
DRAWINGS ARE FOR ILLUSTRATIVE PURPOSES ONLY.
DETAILED DIMENSIONAL INFORMATION AVAILABLE FROM FACTORY
IMK2574 & IMK2575 feature
Single-Sided Gold Wirebondable
Terminals on Ports 1-3.
Port 4 (GND) Wraps to Solder
or Epoxyable Backplane.
Ver 2 1/2011 Specifications Subject to Change Without Notice
Tel (401) 683-9700
Fax (401) 683-5571
e-mail: ims@ims-resistors.com
http://www.ims-resistors.com
International
Manufacturing
Services, Inc.
Visit us on the web!
www.ims-resistors.com
IMK2549-20DB Coupling
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
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with increasing nominal dB value.
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1:-20.039 dB
0.0500 GHz
2:-18.072 dB
3.0000 GHz
3:-14.934 dB
6.0000 GHz
4:-10.169 dB
10.0000 GHz
5:-28.829 dB
20.0000 GHz
CH1 S21 log 10 dB/ REF 0dB
Cor
Smo
Δ
1
Δ
2
Δ
3
START 0.0500 GHz STOP 20.0000 GHz
Δ
4
Δ
5
1:-0.8110 dB
0.0500 GHz
2:-1.1760 dB
3.0000 GHz
3:-1.5680 dB
6.0000 GHz
4:-2.6810 dB
10.0000 GHz
5:-24.774 dB
20.0000 GHz
CH1 S21 log 10 dB/ REF 0dB
Cor
Del
Δ
1
Δ
2
Δ
3
START 0.0500 GHz STOP 20.0000 GHz
Δ
4
Δ
5
IMK2549-20DB Measured Insertion Loss
CH2 S21 log 5 dB/ REF 0dB
Cor
Δ
1
Δ
2
Δ
3
START 0.0500 GHz STOP 20.0000 GHz
Δ
4
Δ
5
IMK2549-13DB Coupling
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
5:-22.442 dB
20.0000 GHz
CH2 S21 log 5 dB/ REF 0dB
Cor
Δ
1
Δ
2Δ
3
START 0.0500 GHz STOP 20.0000 GHz
Δ
4
Δ
5
IMK2549-13DB Measured Insertion Loss
Includes Fixture Loss Includes Fixture Loss
Includes Fixture Loss Includes Fixture Loss
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IMK2549-30DB Coupling IMK2549-30DB Measured Insertion Loss
1:-0.2670 dB
0.0500 GHz
2:-0.6450 dB
3.0000 GHz
3:-0.9540 dB
6.0000 GHz
4:-2.0000 dB
10.0000 GHz
5:-22.357 dB
20.0000 GHz
CH2 S21 log 10 dB/ REF 0dB
Cor
Del
Δ
1
Δ
2
Δ
3
START 0.0500 GHz STOP 20.0000 GHz
Δ
4
Δ
5
Includes Fixture Loss
1:-30.054 dB
0.0500 GHz
2:-22.404 dB
3.0000 GHz
3:-17.871 dB
6.0000 GHz
4:-10.182 dB
10.0000 GHz
5:-23.180 dB
20.0000 GHz
CH2 S21 log 10 dB/ REF 0dB
Cor
Δ
1Δ
2
Δ
3
START 0.0500 GHz STOP 20.0000 GHz
Δ
4
Δ
5
Includes Fixture Loss
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