Advanced Technical Materials, Inc. ADVANCED TECHNICAL MATERIALS INC. tech notes #267 ATM SHORT LENGTH HIGH DIRECTIVITY [SLHD] WAVEGUIDE COUPLERS ATM’s Short Length High Directivity [SLHD] Waveguide Directional Couplers are designed to meet requirements for a coupler smaller than traditional Crossguide or Broadwall Couplers, BUT, have better Directivity and accuracy than that of Loop Couplers or Crossguide Couplers. The table below summarizes the features of the various types of Waveguide Couplers. COMPARISON OF TYPICAL WAVEGUIDE COUPLERS Coupler Type Directivity Coupling dB Coupling Interface Size Crossguide 20dB min 30dB to 60dB Flange or Coax Medium Loop 15dB min 30dB to 50dB Coax Small Short Length High Directivity (SLHD) 25dB min 30dB to 60dB Coax Small Broadwall 30dB min 3dB to 60dB Flange or Coax Large ATM’s Short Length High Directivity Coupler has Directivity 25dB min, (30dB typical) in a short insertion length package. Select from full band units and shorter partial band units. Typical nominal coupling variation of +/-0.5dB and flatness of +/-0.5dB are obtained by carefully controlled manufacturing methods. KEY FEATURES INCLUDE: Directivity: 25dB min, 30dB typical (for 30dB, 40dB, or 50dB coupling) Units are available in full frequency band models [-339 Base Model], or partial band models, which are designed for approximately 40% bandwidth. Single or Dual Coupled Output Units Coupled Output to SMA-f Connectors or Type-K [2.9mm], depending upon frequency band. Coupling: 30dB, 40dB, or 50dB is standard. Others available upon request. VSWR Mainline: 1.05 max ; VSWR Coax: 1.25 max (1.40 max WR28 thru WR42, 1.5 max WR22) Nominal Coupling: Accuracy +/-0.5dB Frequency Sensitivity: +/-0.5dB Units can be pressure tested to 30psi. (Use “/PT” option) Advanced Technical Materials Inc 49 Rider Avenue Patchogue, NY 11772, USA Pg. 1 of 3 Voice: (631) 289-0363 Email: [email protected] Fax: (631) 289-0358 URL: http://www.atmmicrowave.com Advanced Technical Materials, Inc. ATM SHORT LENGTH HIGH DIRECTIVITY [SLHD] WAVEGUIDE COUPLERS (cont’d) #267 Short Length, High Directivity Couplers - Single ELECTRICAL SPECS VSWR: 1.05 Mainline 1.25 Secondary arm (1.40 for WR22, WR28, WR34,WR42) Standard Coupling values: 30dB, 40dB, 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 SPECS Body: Aluminum Standard, Brass/Copper available Flanges: Multiple types available Connectors: Stainless Steel Operation Temp: -45° to 110°C OPTIONS Pressure sealed Units: Units sealed to hold 10 psi. When ordering, add “/PT” to model number. Example: P/N 34-331A-30-6-6 sealed, becomes 34-331A-30-6-6/PT Standard Models WG Size Freq (GHz) ** Standard Model No. * Length (inches) 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 - 11.00 102-339A-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 WR75 10.0 - 15.0 75-339A-dB-6-6 9.2 WR75 10.7 - 12.7 75-331A-dB-6-6 3.0 WR75 13.5 - 14.5 75-332A-dB-6-6 3.0 WR62 12.4 - 18.0 62-339A-dB-6-6 8.1 WR62 15.0 - 18.0 62-331A-dB-6-6 3.0 WR51 15.0 - 22.0 51-339A-dB-6-6 3.0 WR51 18.2 - 21.0 51-331A-dB-6-6 3.0 WR42 17.7 - 21.0 42-331A-dB-6-6 3.0 WR42 18.0 - 26.5 42-339A-dB-6-6 3.0 WR34 22.0 - 33.0 34-339A-dB-6-6 3.0 WR34 27.8 - 32.2 34-331A-dB-6-6 2.75 WR28 26.5 - 40.0 28-339A-dB-6-6 2.75 WR28 27.3 - 32.7 28-331A-dB-6-6 2.5 WR28 36.0 - 40.0 28-332A-dB-6-6 2.5 WR22 33.0 - 50.0 22-339A-dB-6-6 2.5 WR22 40.0 - 44.0 22.331A-dB-6-6 2.5 ** Units are available in full frequency band models [-339 Base Model] or partial band models, which are designed for approximately 40% bandwidth. Consult factory for other bands and specifications. * When ordering, replace “-dB” with 20, 40, or 50, for coupling value. Pg. 2 of 3 Advanced Technical Materials Inc 49 Rider Avenue Patchogue, NY 11772, USA Voice: (631) 289-0363 Email: [email protected] Fax: (631) 289-0358 URL: http://www.atmmicrowave.com Advanced Technical Materials, Inc. ATM SHORT LENGTH HIGH DIRECTIVITY [SLHD] WAVEGUIDE COUPLERS (cont’d) #267 ALSO AVAILABLE IN DUAL OUTPUT ... Short Length, High Directivity Couplers - Dual ELECTRICAL SPECS VSWR: 1.05 Mainline 1.25 Secondary arm (1.40 for WR22, WR28, WR34,WR42) Standard Coupling values: 30dB, 40dB, 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 SPECS Body: Aluminum Standard, Brass/Copper available Flanges: Multiple types available Connectors: Stainless Steel Operation Temp: -45° to 110°C OPTIONS Pressure sealed Units: Units sealed to hold 10 psi. When ordering, 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 * * When ordering, replace “-dB” with 20, 40, or 50, for coupling value. For full specifications, options, and outline drawings, please visit our website at … http://www.atmmicrowave.com Advanced Technical Materials Inc 49 Rider Avenue Patchogue, NY 11772, USA Voice: (631) 289-0363 Email: [email protected] Fax: (631) 289-0358 URL: http://www.atmmicrowave.com Pg. 3 of 3