CDM-M-G Series
DUAL DIRECTIONAL COUPLERS
500 MHz to 18 GHz / Stripline Octave Bandwidths / 10, 20, 30 dB Coupling / 50 W / Low Cost / SMA
PRINCIPAL SPECIFICATIONS
Model
Number
Frequency
Range,
GHz
Nominal
Coupling,¤
dB
10
±1.25
20
±1.25
30
±1.25
10
±1.25
20
±1.25
30
±1.25
10
±1.25
20
±1.25
30
±1.25
10
±1.25
20
±1.25
30
±1.25
10
±1.25
20
±1.25
30
±1.25
10
±1.25
20
±1.25
30
±1.25
10
±1.25
20
±1.25
30
±1.25
20
±1.25
30
±1.25
Frequency
Sensitivity,
dB, Max.
±
0.8
±
0.8
±
0.8
±
0.8
±
0.8
±
0.6
±
0.8
±
0.6
Directivity *Insertion
dB,
Loss, dB,
Min.
Max.
22
1.50
0.50
0.40
1.50
0.50
0.40
1.50
0.50
0.40
1.50
0.50
0.40
1.70
0.50
0.40
1.90
0.70
0.60
2.20
1.00
1.00
1.00
1.00
VSWR, Max.
Main Coupled Outline
Line
Lines
Ref.
1.15:1
1.10:1
1
1
2
3
3
4
5
5
6
7
7
8
7
7
8
7
7
8
7
9
9
9
9
08Jul09
CDM-10M-.75G 0.5 - 1.0
CDM-20M-.75G
CDM-30M-.75G
CDM-10M-1.5G 1.0 - 2.0
CDM-20M-1.5G
CDM-30M-1.5G
CDM-10M-3G
2.0 - 4.0
CDM-20M-3G
CDM-30M-3G
CDM-10M-4G
2.6 - 5.2
CDM-20M-4G
CDM-30M-4G
CDM-10M-6G
4.0 - 8.0
CDM-20M-6G
CDM-30M-6G
CDM-10M-10G 7.0 - 12.4
CDM-20M-10G
CDM-30M-10G
CDM-10M-12G 8.0 - 16.0
CDM-20M-12G
CDM-30M-12G
CDM-20M-15G 12.4 - 18.0
CDM-30M-15G
22
1.15:1
1.10:1
20
1.20:1
1.15:1
18
1.30:1
1.25:1
18
1.35:1
1.25:1
16
1.35:1
1.30:1
15
1.40:1
1.40:1
15
1.40:1
1.40:1
¤Coupling is referenced to the
input
and includes frequency sensitivity
* Insertion Loss
including
Coupling Loss
POWER SPECIFICATIONS
Coupled Power ‘‘Loss’’:
10 dB section:
20 dB section:
30 dB section:
CDM-M-12G:
CDM-M-15G:
All Others:
0.46 dB
0.044 dB
0.004 dB
2 kW max.
1 kW max.
3 kW max.
0 Watts max.
GENERAL SPECIFICATIONS
Impedance:
50
Ω
nom.
Operating Temperature: -- 55° to +85°C
SMA Connectors:
Female, to meet the
interface rqts.
of MIL-C-39012.
N type connectors:
see CDN-M series
Other frequency bands: Available option
Peak Power:
Input Power (Forward):
For further information contact
MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531
CDM-M-G Series
DUAL DIRECTIONAL COUPLERS
500 MHz to 18 GHz / Stripline Octave Bandwidths / 10, 20, 30 dB Coupling / 50 W / Low Cost /
SMA
Package Outline
NOTES:
1. Tolerance on 3 place
decimals
±
.020(.51) except as noted.
2. Dimensions in inches over millimeters.
3. Weights are nominal on all outlines.
General Notes:
1. Units in the CDM series of dual directional couplers comprise two directional couplers back-to-back designed to
monitor both forward and reflected power with minimal perturbation to the main line signal.
2. Each miniature coupler is a multi section quarter wave coupler utilizing stripline technology designed to cover an
octave band of frequencies.
3. Dual directional couplers with unequal coupling values or dual in-line configuration may be custom ordered with
coupling values up to 30 dB and with coverage extending over selected frequency bands up to 18 GHz.
4. Merrimac directional couplers comply with MIL-C-15370 and may be supplied screened for compliance with
additional specifications you designate for military and aerospace applications requiring higher reliability
21Feb96
For further information contact
MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531
stm32/stm8
