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You are here: Home / Waveguide Components / Couplers / Short Length High Directivity

Short Length High Directivity

High Directivity Waveguide Couplers - Short Length

High Directivity Waveguide Couplers

ATM's Short Length High Directivity Waveguide Couplers are used in applications requiring short insertion length with high directivity. 

They are typically used to replace Crossguide Couplers where directivity can be marginal and short length is still important.  Select from full wideband band units and shorter partial band units for each waveguide size. 

Our high directivity couplers have standard coupling values of 20db, 30db, 40db or 50db. Additional coupling values are available, however the length of the coupler may change. Typical nominal coupling variation is of +/-0.5dB and flatness of +/-0.75dB are obtained by carefully controlled machining patterns.

Pressure sealed units are also available for microwave applications that require sealed systems. Please call us and discuss your needs with one of our design engineers.

Waveguide Couplers:
Crossguide Directional Couplers
Crossguide Directional Dual Arm
Broadwall Multi-Hole Couplers
Broadwall Multi-Hole Dual Arm
Loop Couplers
Loop Couplers - Double Ridge
Power Samplers
Power Samplers - Double Ridge

Coaxial:
Coaxial Couplers

Ka-Band:
Ka-Band Coaxial Couplers
Ka-Band Waveguide Couplers

Short Length, High Directivity Couplers - Single

 

Short Length High Directivity Waveguide Coupler - Single
Short Length High Directivity Waveguide Coupler - Single

Tech Note #267 (PDF) has more
info on SLHD Waveguide Couplers

 

 

GENERAL SPECIFICATIONS

Electrical
VSWR: 1.05 Primary arm
1.25 Secondary arm (1.40 for WR28, WR34, WR42; 1.5 for WR22)
Std. coupling values: 20, 30, 40, 50dB (Other coupling values available, but length of unit may change)
Coupling Accuracy: +/- 0.5dB
Frequency Sensitivity: +/- 0.5dB
Directivity: 25dB min, 30dB typical
Mechanical
Body: Aluminum
Flanges: Multiple types available* - see ATM Std. Flanges
*Choosing a non-standard flange type may change length.
Connectors: Stainless Steel
Operation Temp:
Finish: Unique corrosion resistant 316 stainless steel epoxy coating IAW MIL-F-14072
Applicable Mil-Specs
General:
Product Specific:
Options
Pressure Sealed Units: Add "/PT" to model number.
Example P/N: 34-331A-30-6-6
Sealed P/N: 34-331A-30-6-6/PT/PT
Note: Pressure sealed units will hold 15 psi assuming all waveguide and coax ports are mated and sealed.

Standard Models
WG Size Freq. (GHz)** Standard
Model No.*
Length
(Inches)
Outline
Drawings
WR430 1.70 - 2.60 430-339A-dB-2-2 48.0  
WR430 1.82 - 2.18 430-331A-dB-2-2 26.0  
WR340 2.20 - 3.30 340-339A-dB-2-2 36.0  
WR340 2.78 - 3.22 340-331A-dB-2-2 19.0  
WR284 2.60 - 3.95 284-339A-dB-6-6 25.0  
WR284 2.90 - 3.10 284-331A-dB-6-6 16.0 Dwg
WR229 3.30 - 4.90 229-339A-dB-2-2 21.0  
WR229 3.60 - 4.30 229-331A-dB-2-2 14.0  
WR187 3.95 - 5.85 187-339A-dB-6-6 17.3  
WR187 4.00 - 4.50 187-331A-dB-6-6 12.0  
WR159 4.90 - 7.05 159-339A-dB-2-2 15.1  
WR159 5.80 - 6.50 159-331A-dB-2-2 9.0  
WR137 5.85 - 8.20 137-339A-dB-2-2 13.3  
WR137 5.80 - 6.50 137-331A-dB-2-2 7.0  
WR137 7.20 - 7.80 137-332A-dB-2-2 7.0  
WR137 7.90 - 8.40 137-333A-dB-2-2 7.0  
WR112 7.05 - 10.0 112-339A-dB-6-6 12.3  
WR112 7.20 - 7.80 112-332A-dB-6-6 5.5  
WR112 8.50 - 9.50 112-331A-dB-6-6 5.5  
WR102 7.00 - 11.0 102-339A-dB-6-6 12.0  
WR102 8.20 - 9.80 102-331A-dB-6-6 4.75  
WR90 8.20 - 12.40 90-339A-dB-6-6 11.4  
WR90 8.16 - 9.84 90-331A-dB-6-6 4.0 Dwg
WR75 10.0 - 15.0 75-339A-dB-6-6 9.2  
WR75 10.7 - 12.7 75-331A-dB-6-6 3.0 Dwg
WR75 13.5 - 14.5 75-332A-dB-6-6 3.0 Dwg
WR62 12.4 - 18.0 62-339A-dB-6-6 8.1  
WR62 15.0 - 18.0 62-331A-dB-6-6 3.0 Dwg
WR51 15.0 - 22.0 51-339A-dB-6-6 7.1  
WR51 18.2 - 21.0 51-331A-dB-6-6 3.0  
WR42 17.7 - 21.0 42-331A-dB-6-6 3.0 Dwg
WR42 18.0 - 26.5 42-339A-dB-6-6 6.6  
WR34 22.0 - 33.0 34-339A-dB-6-6 6.5  
WR34 27.8 - 32.2 34-331A-dB-6-6 2.75  
WR28 26.5 - 40.0 28-339A-dB-6-6 5.4  
WR28 27.3 - 32.7 28-331A-dB-6-6 2.5 Dwg
WR28 36.0 - 40.0 28-332A-dB-6-6 2.5 Dwg
WR22 33.0 - 50.0 22-339A-dB-6-6 5.4  
WR22 40.0 - 44.0 22-331A-dB-6-6 2.5  

** Units are available in full frequency band models [-339 Base Model] or shorter partial band models which designed for approximately 40% bandwidth.  Consult factory for other specifications bands and specifications.

Ordering Information
Short Length High Directivity
Couplers - Single
WR -Mod M -dB -F1 -F2
Example part number:  112 -331 A -30F -6 -6
Waveguide Size: (WR)
WR22 thru WR430 available
         
Basic Model No.: (-Mod)        
Material (M): A=Aluminum, B=Copper/Brass      
Coupling (-dB): 30, 40 or 50 dB Standard      
Flange 1 (-F1): 1=CPRG, 2=CPRF, 6=Cover, 8=Seal Groove  
Flange 2 (-F2): 1=CPRG, 2=CPRF, 6=Cover, 8=Seal Groove
See ATM Standard Flange page for more info.
 

* The Standard Model Numbers above are the most common parts ordered for size, material and flange. However, these models can easily be altered for your needs by using the Model # code system to the left.

Option: Add /PT to part number for pressure sealed unit to 15 psi.

 

Short Length, High Directivity Waveguide Couplers - Dual
Short Length High Directivity Waveguide Coupler - Dual
Short Length High Directivity Waveguide Coupler - Dual

Tech Note #267 (PDF) has more
info on SLHD Waveguide Couplers

GENERAL SPECIFICATIONS

Electrical
VSWR: 1.05 Primary arm
1.25 Secondary arm (1.40 for WR28, WR34, WR42; 1.5 for WR22)
Std. coupling values: 20, 30, 40, 50dB (Other coupling values available, but length of unit may change)
Coupling Accuracy: +/- 0.5dB
Frequency Sensitivity: +/- 0.5dB
Directivity: 25dB min, 30dB typical
Mechanical
Body: Aluminum
Flanges: Multiple types available* - see ATM Std. Flanges
*Choosing a non-standard flange type may change length.
Connectors: Stainless Steel
Operation Temp:
Finish: Unique corrosion resistant 316 stainless steel epoxy coating IAW MIL-F-14072
Applicable Mil-Specs
General:
Product Specific:
Options
Pressure seal Units: Units sealed to hold 10 psi.  Add "/PT" to model number.
Example: P/N 34-331DA-30-30-6-6
Sealed becomes:
34-331DA-30-30-6-6/PT

Standard Models
WG Size Freq. (GHz)** Standard
Model No.*
Length
(Inches)
Outline
Drawings
WR137 5.80 - 6.50 137-331DA-dBF-dBR-2-2 7.00  
WR137 7.20 - 7.80 137-332DA-dBF-dBR-2-2 7.00  
WR137 7.90 - 8.40 137-333DA-dBF-dBR-2-2 7.00  
WR112 8.50 - 9.50 112-331DA-dBF-dBR-6-6 5.50  
WR102 8.20 - 9.80 102-331DA-dBF-dBR-6-6 4.75  
WR90 8.16 - 9.84 90-331DA-dBF-dBR-6-6 4.00  
WR75 13.5 - 14.5 75-331DA-dBF-dBR-6-6 3.00  
WR62 15.0 - 18.0 62-331DA-dBF-dBR-6-6 3.00  
WR51 18.2 - 21.0 51-331DA-dBF-dBR-6-6 3.00  
WR51 15.0 - 17.5 51-332DA-dBF-dBR-6-6 3.00  
WR42 17.7 - 21.0 42-331DA-dBF-dBR-6-6 3.00  
WR34 27.8 - 32.2 34-331DA-dBF-dBR-6-6 2.75  
WR28 27.3 - 32.7 28-331DA-dBF-dBR-6-6 2.50  
WR28 36.0 - 40.0 28-332DA-dBF-dBR-6-6 2.50 Dwg
WR22 40.0 - 44.0 22-331DA-dBF-dBR-6-6 2.50  

** These units are designed for approximately 40% bandwidth, consult factory for other specifications

Ordering Information
Short Length High Directivity
Couplers - Dual
WR -Mod M -dBF -dBR -F1 -F2
Example part number:  75 -331D A -30F -40R -6 -6
Waveguide Size: (WR)
WR22 thru WR137 available
           
Basic Model No.: (-Mod)          
Material (M): A=Aluminum, B=Copper/Brass        
Fwd. Coupling (-dBF) 30, 40 or 50 dB Standard        
Rev. Coupling (-dBR) 30, 40 or 50 dB Standard    
Flange 1 (-F1): 1=CPRG, 2=CPRF, 6=Cover, 8=Seal Groove  
Flange 2 (-F2): 1=CPRG, 2=CPRF, 6=Cover, 8=Seal Groove
See ATM Standard Flange page for more info.

* The Standard Model Numbers above are the most common parts ordered for size, material and flange. However, these models can easily be altered for your needs by using the Model # code system to the left.

Option: Add /PT to part number for pressure sealed unit to 15 psi.

 

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