Fixed Attenuators 18 - 325 GHz 3(WG) 109 Series V2.00 Features ● ● ● Low and High Power Full Waveguide Bandwidths Minimum VSWR Description This series of attenuators provides an inexpensive method of making measurements in fixed frequency laboratory or production test set-ups. Fixed attenuators are generally designed into a system at a given frequency for a specific purpose such as detector protection. These units consist of a section of waveguide into which a fixed resistive vane is inserted. Mechanical Specifications Waveguide WR-42 WR-28 WR-22 WR-19 WR-15 WR-12 WR-10 WR-08 WR-06 WR-05 WR-04 WR-03 RF Mating Flange 54-001-M MIL-F-3922/ 68-001 67B-006 67B-007 67B-008 67B-009 67B-010 74-001 74-002 74-003 74-004 74-005 UG Reference 595/U 599/U 383/U 383/U-M 385/U 387/U 387/U-M Pin Contact Pin Contact Pin Contact Pin Contact Pin Contact Dim (Max.) Inch (mm) A 3.50 (88.9) 3.00 (76.2) 3.00 (76.2) 3.00 (76.2) 2.00 (50.8) 2.00 (50.8) 2.00 (50.8) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) 1.50 (38.1) Specifications Waveguide WR-42 WR-28 WR-22 WR-19 WR-15 WR-12 WR-10 WR-08 WR-06 WR-05 WR-04 WR-03 Frequency (GHz) 18-26.5 26.5-40 33-50 40-60 50-75 60-90 75-110 90-140 110-170 140-220 170-260 220-325 VSWR (Max.) 1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.17 1.19 1.21 1.25 1.30 Power (W) 0.70 0.60 0.60 0.50 0.40 0.40 0.30 0.10 0.08 0.05 0.03 0.01 Part Number 3-42-109 3-28-109 3-22-109 3-19-109 3-15-109 3-12-109 3-10-109 3-08-109 3-06-109 3-05-109 3-04-109 3-03-109 Notes: 1. When ordering, specify center frequency and attenuation value in 1 dB steps to 30 dB max. Contact factory for high-power options Specifications Subject to Change Without Notice. M/A-COM, Inc. North America: 1 Tel. (800) 366-2266 Fax (800) 618-8883 ■ Asia/Pacific: Tel. +81 (03) 3226-1671 Fax +81 (03) 3226-1451 ■ Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020