Waveguide Loads, WF series
Finned Dummy Loads 1.12 - 40 GHz
Extremely Rugged High Power Loads High Temperature Refractory Load Elements Transverse Cooling Fins Available with most Common Flanges
Microlab WF series dummy loads are the commercial equivalent of the standard military DA loads. Models are designed to meet the requirements of MIL-D3954A in all electrical and mechanical respects for bands from 1.12 to 40.0 GHz. The WF loads employ transverse cooling fins and high temperature refractory load elements designed to meet the requirements of MIL-D-3954A. These load elements are in direct contact with the waveguide walls for optimum heat transfer. They can withstand extremely high temperature, temperature gradients and thermal shocks. The WG series is a similar finned design, but with enhanced heat transfer. For lower powers unfinned models may meet the need, see the WE series. These loads can be supplied to operate over the full indicated waveguide frequency band. Generally faster delivery and a more economical unit can be furnished for use over narrower frequency ranges. Always specify your frequency and VSWR requirements with any request. Designs to meet special requirements for bandwidth, size, flanges, etc., are available on request. (8/08)
Dissipative Material: Test Pressure: Refractory 35 psig. max. Per TT-E-489 Flange Type: <2.6 GHz: Contact >2.6 GHz Material: Flange Finish: Flange Cover Aluminum Iridite Per MIL-C-5541
Housing Finish: Black Paint
Model No.
Frequency Range GHz
Waveguide Size RG WR
JAN Equivalent
Rated Power* W kW pk avg. Test 8000 4500 2000 1000 600 500 250 150 75 2200 3200 1000 710 460 290 160 80 100
VSWR max. 1.15:1 1.10:1 1.10:1 1.10:1 1.10:1 1.15:1 1.10:1 1.15:1 1.15:1 1.20:1
Nominal Dimensions Inches (mm) L W H 32.9 8.9 11.4 (836) (226) (290) 14.0 4.9 6.4 (356) (124) (163) 9.8 3.6 4.1 (249) (91) (104) 8.0 3.1 3.9 (203) (79) (99) 6.3 2.5 3.1 (160) (64) (79) 5.7 2.8 2.8 (145) (71) (71) 4.3 2.4 2.4 (109) (61) (61) 4.2 2.2 2.2 (107) (56) (56) 4.2 2.0 2.0 (107) (51) (51)
Weight nom. lbs (kg) 90 (41) 11.5 (5.2) 5.1 (2.3) 3.3 (1.5) 1.5 (0.7) 1.3 (0.6) 0.75 (0.34) 0.37 (0.17) 0.37 (0.17)
WF-0005 WF-0025 WF-0035 WF-0045 WF-0050 WF-0055 WF-0065 WF-0075 WF-0085
1.12 - 1.70 2.60 - 3.95 3.95 - 5.85 5.85 - 8.20 7.05 - 10.0 8.20 - 8.80 8.80 - 12.4 12.4 - 18.0 18.0 - 26.5 26.5 - 40.0
103 75 95 106 68 67 349 121 ‡96
650 284 187 137 112 90 62 42 28
DA-147/U DA-145/U DA-149/U DA-144/U DA-148/U DA-146/U DA-159/U DA-160/U DA-158/U
‡Aluminum Equivalent
*when tested in accordance with MIL-D-3954A
Microlab, A Wireless Telecom Group Company, 25 Eastmans Road, Parsippany, NJ 07054 Tel: (973) 386-9696 •
[email protected] • www.microlab.fxr.com • Fax: (973) 386-9191
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