20 dB Directional Couplers from 0.5 to 60 GHz
Pulsar Microwave's 20 dB high frequency single directional couplers make up the CS20 series. They are available in narrow or wideband designs from 500 MHz to 60 GHz. They have a typical coupling tolerance of +/- 1 or 1.25 dB and most models handle 50 watts input power. These directional couplers are designed to operate in a 50-ohm system, and are optimized for best matching and high directivity with flat coupling response. Standard outlines are offered in SMA or N type female packages, either all of one type or combination with N type mainline and SMA coupled port.
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0.5-1 GHz 20 dB Directional Coupler - SMA

CS20-01-436/3
Frequency Range:
0.5-1 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
25
dB min.
VSWR:
1.15:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
0.5-1 GHz 20 dB Directional Coupler - Type-N

CS20-01-436/3N
Frequency Range:
0.5-1 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
22
dB min.
VSWR:
1.15:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.5-2 GHz 20 dB Directional Coupler - Type-N

CS20-02-436/1N
Frequency Range:
0.5-2 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.35 dB max.
Directivity:
20
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.5-2 GHz 20 dB Directional Coupler - SMA

CS20-02-436/2
Frequency Range:
0.5-2 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.00 dB max.
Insertion Loss:
0.35 dB max.
Directivity:
23
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
1-2 GHz 20 dB Directional Coupler - SMA

CS20-03-436/7
Frequency Range:
1-2 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
25
dB min.
VSWR:
1.10:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
1-2 GHz 20 dB Directional Coupler - Type-N

CS20-03-436/7N
Frequency Range:
1-2 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
20
dB min.
VSWR:
1.10:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.8-2.2 GHz 20 dB Directional Coupler - SMA

CS20-02A-436/3
Frequency Range:
0.8-2.2 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.35 dB max.
Directivity:
23
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
0.8-2.2 GHz 20 dB Directional Coupler - Type-N

CS20-02A-436/3N
Frequency Range:
0.8-2.2 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.35 dB max.
Directivity:
20
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.8-2.5 GHz 20 dB Directional Coupler - SMA

CS20-22-436/3
Frequency Range:
0.8-2.5 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.70 dB max.
Insertion Loss:
0.40 dB max.
Directivity:
20
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
1-4 GHz 20 dB Directional Coupler - SMA

CS20-04-436/13
Frequency Range:
1-4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.40 dB max.
Directivity:
23
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
1-4 GHz 20 dB Directional Coupler - Type-N

CS20-04-436/13N
Frequency Range:
1-4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.40 dB max.
Directivity:
18
dB min.
VSWR:
1.20:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
2-4 GHz 20 dB Directional Coupler - SMA

CS20-05-436/10
Frequency Range:
2-4 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
22
dB min.
VSWR:
1.15:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
2-4 GHz 20 dB Directional Coupler - Type-N

CS20-05-436/11N
Frequency Range:
2-4 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
18
dB min.
VSWR:
1.15:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
3.6-4.2 GHz 20 dB Directional Coupler - SMA

CS20-06-435/1
Frequency Range:
3.6-4.2 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.30 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
3.6-4.2 GHz 20 dB Directional Coupler - Type-N

CS20-06-436/11N
Frequency Range:
3.6-4.2 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.30 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
18
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
2.6-5.2 GHz 20 dB Directional Coupler - SMA

CS20-07-435/1
Frequency Range:
2.6-5.2 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
20
dB min.
VSWR:
1.25:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
2.6-5.2 GHz 20 dB Directional Coupler - Type-N

CS20-07-436/11N
Frequency Range:
2.6-5.2 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.20 dB max.
Directivity:
18
dB min.
VSWR:
1.25:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
5.8-6.4 GHz 20 dB Directional Coupler - SMA

CS20-08-435/1
Frequency Range:
5.8-6.4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.30 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
5.8-6.4 GHz 20 dB Directional Coupler - Type-N

CS20-08-436/11N
Frequency Range:
5.8-6.4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.30 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
18
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
2-8 GHz 20 dB Directional Coupler - Type-N

CS20-09-436/7N
Frequency Range:
2-8 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.40 dB max.
Directivity:
15
dB min.
VSWR:
1.25:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
2-8 GHz 20 dB Directional Coupler - SMA

CS20-09-436/9
Frequency Range:
2-8 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.40 dB max.
Directivity:
20
dB min.
VSWR:
1.25:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
4-8 GHz 20 dB Directional Coupler - SMA

CS20-10-435/1
Frequency Range:
4-8 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.25 dB max.
Directivity:
20
dB min.
VSWR:
1.30:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
4-8 GHz 20 dB Directional Coupler - Type-N

CS20-10-436/11N
Frequency Range:
4-8 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.25 dB max.
Directivity:
17
dB min.
VSWR:
1.30:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
7.2-8.5 GHz 20 dB Directional Coupler - SMA

CS20-11-435/1
Frequency Range:
7.2-8.5 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.30 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
7.2-8.5 GHz 20 dB Directional Coupler - Type-N

CS20-11-436/11N
Frequency Range:
7.2-8.5 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.30 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.5-12 GHz 20 dB Directional Coupler - SMA

CS20-19-436/19
Frequency Range:
0.5-12 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.80 dB max.
Insertion Loss:
1.00 dB max.
Directivity:
15
dB min.
VSWR:
1.50:1 max.
Input Power:
25 watts max.
Reflected Power:
25 watts max.
Connector Type:
SMA
4-12.4 GHz 20 dB Directional Coupler - SMA

CS20-14-436/15
Frequency Range:
4-12.4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.40 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
17
dB min.
VSWR:
1.30:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
7-12.4 GHz 20 dB Directional Coupler - SMA

CS20-12-435/1
Frequency Range:
7-12.4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.30 dB max.
Directivity:
17
dB min.
VSWR:
1.30:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
7-12.4 GHz 20 dB Directional Coupler - Type-N

CS20-12-436/11N
Frequency Range:
7-12.4 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.30:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
7.5-16 GHz 20 dB Directional Coupler - SMA

CS20-13-435/3
Frequency Range:
7.5-16 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
7.5-16 GHz 20 dB Directional Coupler - Type-N

CS20-13-436/11N
Frequency Range:
7.5-16 GHz
Coupling:
20.0 ± 1.25 dB
Coupling Flatness:
±0.75 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
13
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.5-18 GHz 20 dB Directional Coupler - SMA

CS20-23-436/20
Frequency Range:
0.5-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.00 dB max.
Insertion Loss:
0.90 dB max.
Directivity:
0.5-12 GHz: 15
dB min.
12-18 GHz: 12 dB min.
12-18 GHz: 12 dB min.
VSWR:
1.50:1 max.
Input Power:
25 watts max.
Reflected Power:
25 watts max.
Connector Type:
SMA
1-18 GHz 20 dB Directional Coupler - SMA

CS20-18-436/16
Frequency Range:
1-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.80 dB max.
Directivity:
1.0-12 GHz: 15
dB min.
12-18 GHz: 12 dB min.
12-18 GHz: 12 dB min.
VSWR:
1.50:1 max.
Input Power:
25 watts max.
Reflected Power:
25 watts max.
Connector Type:
SMA
1-18 GHz 20 dB Directional Coupler - Type-N

CS20-18-436/16N
Frequency Range:
1-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.80 dB max.
Directivity:
1.0-12 GHz: 15
dB min.
12-18 GHz: 12 dB min.
12-18 GHz: 12 dB min.
VSWR:
1.50:1 max.
Input Power:
25 watts max.
Reflected Power:
25 watts max.
Connector Type:
N
2-18 GHz 20 dB Directional Coupler - SMA

CS20-15-436/13
Frequency Range:
2-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.60 dB max.
Directivity:
2.0-12 GHz: 15
dB min.
12-18 GHz: 12 dB min.
12-18 GHz: 12 dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
4-18 GHz 20 dB Directional Coupler - SMA

CS20-16-436/14
Frequency Range:
4-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.60 dB max.
Directivity:
4.0-12 GHz: 15
dB min.
12-18 GHz: 12 dB min.
12-18 GHz: 12 dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
12.4-18 GHz 20 dB Directional Coupler - SMA

CS20-17-435/3
Frequency Range:
12.4-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
15
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
SMA
12.4-18 GHz 20 dB Directional Coupler - Type-N

CS20-17-436/11N
Frequency Range:
12.4-18 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.50 dB max.
Insertion Loss:
0.50 dB max.
Directivity:
12
dB min.
VSWR:
1.40:1 max.
Input Power:
50 watts max.
Reflected Power:
50 watts max.
Connector Type:
N
0.5-20 GHz 20 dB Directional Coupler - SMA

CS20-25-436/20
Frequency Range:
0.5-20 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.00 dB max.
Insertion Loss:
0.90 dB max.
Directivity:
15
dB min.
VSWR:
1.50:1 max.
Input Power:
25 watts max.
Reflected Power:
10 watts max.
Connector Type:
SMA
8-20 GHz 20 dB Directional Coupler - SMA

CS20-21-435/3
Frequency Range:
8-20 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.80 dB max.
Insertion Loss:
1.00 dB max.
Directivity:
12
dB min.
VSWR:
1.50:1 max.
Input Power:
25 watts max.
Reflected Power:
25 watts max.
Connector Type:
SMA
6-26.5 GHz 20 dB Directional Coupler - 2.92mm

CS20-50-435/4
Frequency Range:
6-26.5 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±0.80 dB max.
Insertion Loss:
0.70 dB max.
Directivity:
13
dB min.
VSWR:
1.55:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.92
0.5-27 GHz 20 dB Directional Coupler - 2.92mm

CS20-56-436/20
Frequency Range:
0.5-27 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.20 dB max.
Insertion Loss:
1.80 dB max.
Directivity:
14
dB min.
VSWR:
1.50:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.92
0.5-40 GHz 20 dB Directional Coupler - 2.92mm

CS20-57-436/20
Frequency Range:
0.5-40 GHz
Coupling:
20.0 ± 1.50 dB
Coupling Flatness:
±1.50 dB max.
Insertion Loss:
2.20 dB max.
Directivity:
12
dB min.
VSWR:
1.60:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.92
1-40 GHz 20 dB Directional Coupler - 2.92mm

CS20-53-436/13
Frequency Range:
1-40 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.50 dB max.
Insertion Loss:
1.60 dB max.
Directivity:
10
dB min.
VSWR:
1.80:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.92
2-40 GHz 20 dB Directional Coupler - 2.92mm

CS20-52-436/9
Frequency Range:
2-40 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.00 dB max.
Insertion Loss:
1.60 dB max.
Directivity:
10
dB min.
VSWR:
1.80:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.92
6-40 GHz 20 dB Directional Coupler - 2.92mm

CS20-51-435/4
Frequency Range:
6-40 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.00 dB max.
Insertion Loss:
1.20 dB max.
Directivity:
10
dB min.
VSWR:
1.70:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.92
6-50 GHz 20 dB Directional Coupler - 2.40mm

CS20-54-435/4
Frequency Range:
6-50 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±1.00 dB max.
Insertion Loss:
1.60 dB max.
Directivity:
10
dB min.
VSWR:
2.00:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
2.40
6-60 GHz 20 dB Directional Coupler - 1.85mm

CS20-55-435/4
Frequency Range:
6-60 GHz
Coupling:
20.0 ± 1.00 dB
Coupling Flatness:
±2.00 dB max.
Insertion Loss:
1.80 dB max.
Directivity:
7
dB min.
VSWR:
2.50:1 max.
Input Power:
20 watts max.
Reflected Power:
20 watts max.
Connector Type:
1.85
- Insertion loss does not include coupling loss.
- Input power is specified for load VSWR better than 1.20:1.