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Coupler Type:

Package Type:

Impedance:

Frequency Range:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Average Power:

Coupling:

dB

Directivity:

dB

Insertion Loss:

dB

VSWR:

:1

Help with RF Couplers specifications:

General Specifications
   Coupler Type       
   Your choices are...         
   Uni-Directional       The unidirectional coupler is a 3-port device that has a main line input and output and a coupled line that has a coupled output and an internal termination on the 4th port. Power passing from input to output is coupled to the coupled output and any reflected power from the main line output is coupled to the termination. The coupled output is thus isolated from the main output. A unidirectional coupler has the reverse coupled port internally terminated. 
   Bi-Directional       The bidirectional coupler is a 4-port device identical to the unidirectional coupler, but with the termination removed from the 4th port. Main line power is coupled to the forward output of the secondary line and reflected power is coupled to the reflected output. It must be noted that for isolation to be attained, coupled outputs must be obtained through well-matched terminations at each port. A bidirectional coupler is not internally terminated at the reverse coupled port. It is intended to allow the transmission of forward and reflected signals. 
   Dual Directional       The dual directional coupler is a 4-port device that is constructed of two unidirectional couplers. They can either be connected back-to- back in series, with the main line output of the forward coupler connected to the output of the second coupler, or integrated into one device with a single main line and 2 secondary lines. The advantage of this integration is a more compact unit (shorter), and because there is only one main line, insertion loss is less and higher isolation is more easily attained. 
   Other       Other unlisted coupler types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Package Type:       
   Your choices are...         
   Surface Mount Technology (SMT)       Surface mount technology (SMT) adds components to a printed circuit board (PCB) by soldering component leads or terminals to the top surface of the board. SMT components have a flat surface that is soldered to a flat pad on the face of the PCB. Typically, the PCB pad is coated with a paste-like formulation of solder and flux. With careful placement, SMT components on solder paste remain in position until elevated temperatures, usually from an infrared oven, melt the paste and solder the component leads to the PCB pads.   Industry-standard pick-and-place equipment can mount SMT components quickly, accurately, and cost-effectively. SMT is a widely used alternative to mounting processes that insert pins or terminals through holes and solder leads into place on the opposite side of the board. 
   Flatpack       Flat pack (FPAK) devices have gull wing or flat leads on two or four sides. They provide exceptional thermal and electrical performance and are available in cavity-up and cavity-down configurations. Flat pack devices are typically ceramic, hermetic, and surface-mounted. They are available in a variety of body sizes and pin counts. 
   Through Hole Technology (THT)       Through hole technology (THT) mounts components on a printed circuit board (PCB) by inserting component leads through holes in the board and then soldering the leads in place on the opposite side of the board. 
   Connectorized       Connectorized devices attach with coaxial or other types of connectors. 
   Other       Other unlisted package types. 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Impedance:       
   Your choices are...         
   50 ohms       The coupler has an impedance of 50 ohms. 
   75 ohms       The coupler has an impedance of 75 ohms. 
   Other       Other unlisted impedances. 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Performance
   Frequency Range:       The range of frequencies the coupler is designed for. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
   Average Power       The CW (continuous wave) average power handling capability with one-way transmission through the main line of the coupler under matched load conditions. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Coupling:       The ratio (in dB) of the power measured at the output port relative to that measured at the forward coupled port. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Directivity:       The ratio (in dB) of the power measured at the reverse coupled port relative to that measured at the forward coupled port when the output port is ideally terminated. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Insertion Loss:       Insertion loss (in dB) is the total RF power transmission loss resulting from the insertion of a device in a transmission line. It is defined as the ratio of signal power at the output of the inserted device to the input signal power at the input of the inserted device.  
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   VSWR:       VSWR (Voltage Standing Wave Ratio) is a unitless ratio ranging from 1 to infinity, expressing the amount of reflected energy at the input of the device.  A value of one indicates that all the energy will pass through, while any other value indicates that a portion of the energy will be reflected. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   Tables:         
   VSWR vs. Return Loss     

VSWR

Return Loss (dB)

Reflected Power (%)

VSWR

Return Loss (dB)

Reflected Power (%)

1.00

Infinity

0.000

1.38

15.9

2.55

1.01

46.1

0.005

1.39

15.7

2.67

1.02

40.1

0.010

1.40

15.55

2.78

1.03

36.6

0.022

1.41

15.38

2.90

1.04

34.1

0.040

1.42

15.2

3.03

1.05

32.3

0.060

1.43

15.03

3.14

1.06

30.7

0.082

1.44

14.88

3.28

1.07

29.4

0.116

1.45

14.7

3.38

1.08

28.3

0.144

1.46

14.6

3.50

1.09

27.3

0.184

1.47

14.45

3.62

1.10

26.4

0.228

1.48

14.3

3.74

1.11

25.6

0.276

1.49

14.16

3.87

1.12

24.9

0.324

1.50

14.0

4.00

1.13

24.3

0.375

1.55

13.3

4.8

1.14

23.7

0.426

1.60

12.6

5.5

1.15

23.1

0.488

1.65

12.2

6.2

1.16

22.6

0.550

1.70

11.7

6.8

1.17

22.1

0.615

1.75

11.3

7.4

1.18

21.6

0.682

1.80

10.9

8.2

1.19

21.2

0.750

1.85

10.5

8.9

1.20

20.8

0.816

1.90

10.2

9.6

1.21

20.4

0.90

1.95

 9.8

10.2

1.22

20.1

0.98

2.00

 9.5

11.0

1.23

19.7

1.08

2.10

 9.0

12.4

1.24

19.4

1.15

2.20

 8.6

13.8

1.25

19.1

1.23

2.30

 8.2

15.3

1.26

18.8

1.34

2.40

 7.7

16.6

1.27

18.5

1.43

2.50

 7.3

18.0

1.28

18.2

1.52

2.60

 7.0

19.5

1.29

17.9

1.62

2.70

 6.7

20.8

1.30

17.68

1.71

2.80

 6.5

22.3

1.31

17.4

1.81

2.90

 6.2

23.7

1.32

17.2

1.91

3.00

 6.0

24.9

1.33

17.0

2.02

3.50

 5.1

31.0

1.34

16.8

2.13

4.00

 4.4

36.0

1.35

16.53

2.23

4.50

 3.9

40.6

1.36

16.3

2.33

5.00

 3.5

44.4

1.37

16.1

2.44

6.00

 2.9

50.8

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