Directional Coupler

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Directional couplers are used in a wide variety of applications and can satisfy almost any requirement for sampling incident and reflected microwave power conveniently and accurately with minimal disturbance to the transmission line. Some general applications for directional couplers include line monitoring, power measurements and load source isolators.

Directional Coupler Product Overview
Made in USA

Click on the Series Number for complete specifications
SMA Directional Couplers   N-Type Directional Couplers
CS Directional Coupler
CS Series

50 watts
0.8 - 2.2 GHz
 
50 watts
0.8 - 2.2 GHz
CN Directional Coupler
CN Series
780 Directional Coupler
780 Series
50 watts
0.5-1.0 GHz
1.0-2.0 GHz
0.8-1.6 GHz
0.5-2.0 GHz
1.0-4.0 GHz
2.0-18.0 GHz
2.0-4.0 GHz
2.6-5.2 GHz
4.0-12.4 GHz
6.0-18.0 GHz
4.0-8.0 GHz
2.0-18.0 GHz
7.0-12.4 GHz
7.5-16.0 GHz
12.4-18.0 GHz
500 watts
0.4-0.8 GHz
0.6-1.2 GHz
0.8-2.2 GHz
0.8-2.5 GHz
1.7-2.2 GHz
1.3-2.6 GHz
2.0-4.2 GHz
715 Directional Coupler
715 Series
715S Directional Coupler
715S Series
100 watts
0.4-0.8 GHz
1.7-2.2 GHz
0.6-1.2 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
0.8-2.5 GHz
 
500 watts
0.4-0.8 GHz
1.7-2.2 GHz
0.6-1.2 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
0.8-2.5 GHz
 
722N Directional Coupler
722N Series
722S Directional Coupler
722S Series
100 watts
0.4-0.8 GHz
1.7-2.2 GHz
0.6-1.2 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
0.8-2.5 GHz
 
500 watts
0.4-0.8 GHz
1.7-2.2 GHz
0.6-1.2 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
0.8-2.5 GHz
 
722 Directional Coupler
722 Series
721 Directional Coupler
721 Series
500 watts
0.4-0.8 GHz
1.7-2.2 GHz
0.6-1.2 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
0.8-2.5 GHz
 
3dB, 90° Hybrid
120 & 500 watts

0.4-0.52 GHz
0.8-1.0 GHz
0.8-2.2 GHz
1.7-2.2 GHz

 Hybrid Coupler
705N | H705N
Hybrid Coupler
705S | H705S
3dB, 90° Hybrid
100 & 120 watts

0.8 - 2.2 GHz
0.8-1.0 GHz
1.7-2.2 GHz
3dB, 0°/180° Ring Hybrid
1000 watts

0.4-0.8 GHz
0.8-2.5 GHz
0.6-1.2 GHz
1.7-2.2 GHz
8.0-1.0 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
4.4-5.0 GHz
5.4-6.0 GHz
700 Ring Hybrid
700 Series
 Hybrid Coupler
707N
3dB Hybrid Divider/Combiners
150 watts

0.4-0.8 GHz
0.8-2.5 GHz
0.6-1.2 GHz
1.7-2.2 GHz
8.0-1.0 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
4.4-5.0 GHz
5.4-6.0 GHz
  3dB Hybrid Divider/Combiners
150 watts

0.4-0.8 GHz
0.8-2.5 GHz
0.6-1.2 GHz
1.7-2.2 GHz
8.0-1.0 GHz
1.3-2.6 GHz
0.8-2.2 GHz
2.0-4.2 GHz
4.4-5.0 GHz
5.0-5.5 GHz
5.4-6.0 GHz
 
Hybrid Coupler
707S

When line monitoring, for the purpose of power level measuring and VSWR alarms, a directional coupler is used to sample power from the transmission line without altering line characteristics. In power measurements, insertion of a directional coupler in the transmission line allows measurement with simple low level detectors or field strength meters and power measuring equipment. By reversing the coupler in the transmission line, an indication of impedance match and/or reflected power can be derived by comparing the forward to reflected power levels. This may be more easily accomplished by using a dual directional coupler in the line. A signal can be taken from the source to the tap with high attenuation (directivity) between the tap and the load.

MECA offers a wide selection of directional couplers designed to exceed commercial specifications. Standard coupling values of 6, 10, 20, 30 and 40 dB are available from stock. Custom configurations with special coupling values, external high power terminations and alternate connector styles or plating are also readily available in quantity. All models may be specified without an internal termination for bi-directional coupling. Passive intermodulation (PIM) compliant and weather resistant models are also available. With immediate access to our Application Engineers, you can choose the best product solutions for your specific needs.

Theoretical Mainline Power Split Due to Coupling Factor (dB)
Coupling Factor  40 dB 30 dB 20 dB 10 dB 6 dB 3 dB
 Single 0.0004 0.0043 0.0436 0.4560 1.2560 3.01
Dual 0.0008 0.0086 0.0872 0.9120 2.5120 ~

Featured Product

780 Series
Hybrid Divider Combiners

MECA offers miniature, 50 watt (3kW peak), SMA-Female single directional stripline RF coupler ideal for space restricted applications where precise monitoring, external leveling, signal mixing or swept transmission and reflection measurements are necessary. Nominal coupling values of 10, 20 and 30 dB are standard. More..

Top Selling Couplers

V-Line directional coupler series is Dual-Band and designed to cover all wireless bands from cellular through UMTS (0.8 - 2.2 GHz) while delivering industry-leading value by providing outstanding performance, quality and reliability. More...

Common Coupling Ratios

Coupling Value
Ratio
(%)
3 dB
50/50
6 dB
75/25
8 dB
85/15
10 dB
90/10
15 dB
97/3
20 dB
99/1

The first number of the ratio is the % of power that passes through the device to the output port.  The second is the % of power at the coupled port.