WR75 Waveguide Rotary Joint, 10.7–14.5 GHz

Dolph Microwave

WR75 Waveguide Rotary Joint

Connect the fixed feed line to a rotating antenna without twisting the waveguide. This WR75 model uses an L-style layout and covers the full 10.7–14.5 GHz band.

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WR75 Waveguide Rotary Joint · View full-size photo

Operating band: 10.7–14.5 GHz
Average power: 750 W CW
Insertion loss: 0.2 dB max.

Before you order

Check the space around the rotating joint

Flange arrangement

The model drawing lists FBP120 cover and FBM120 grooved flanges. The L-style geometry has one arm perpendicular to the rotation axis.

Rotation and loading

The PDF lists 150/100 rpm and maximum interface loads of ±15 N in the axial and radial directions. Include the intended rotation duty with your enquiry.

Outdoor conditions

The listed temperature range is −40°C to +71°C, with 95% RH, 30 PSIG pressure and IP65 protection. Review these conditions together for your installation.

For the mating interface, check the EIA and IEC flange reference. If the feed line needs bending as well as rotation, the flexible waveguide selection guide explains which dimensions to specify.

Twistable and Seamless Flexible Waveguide · Separate product option

For the rest of your setup

Does the fixed feed need a flexible section?

A flexible section can help route the stationary side of the assembly. It does not replace the rotary joint. Choose its WR size, flange ends and installed length separately.

Compare flexible waveguide assemblies

Technical data

Specifications & dimensions

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WR75 — model specifications
Model	DH-120WHPRJL10.7T14.5PMA750
Frequency Range	10.7-14.5 GHz
Operating Bandwidth	Full bandwidth
VSWR (Max)	1.2:1
VSWR WOW	0.05
Insertion Loss (Max)	0.2 dB
Insertion loss WOW	0.1 dB
Peak Power	5 KW
Average Power	750 W, CW

Mechanical and environmental specifications
Phase variation over rotation	±1°
Rotating speed	150/100 rpm
Torque (min/max)	0.20 Nm (@ 60°C) / 0.25 Nm (@ 20°C) / 1.5 Nm (@ -30 °C) @ start-up; 0.15 Nm (@ 60°C) / 0.20 Nm (@ 20°C) / 1.0 Nm (@ -30 °C) @ rotation
Interface loads, max.	±15 N in axial direction; ±15 N in radial direction
Life	20*106 revolutions
Waveguide Type	WR75
Style	L style
Flange	FBP120 (Cover)/ FBM120 (Grooved)
Material	Al
Inside Finish	Chromate conversion coat per MIL-DTL-5541 type 1 or type 2
Outside Finish	No Paint
Temperature Range	-40°C ~ +71°C
Humidity	95% RH
Pressure	30 PSIG
Leakage Rate	10 cm3/min
IP Protection Level	IP65
Weight, approx..	0.23 kg

Materials & ordering options

Model: DH-120WHPRJL10.7T14.5PMA750
Style: L style
Material: Al
Outside finish: No Paint

Technical documents

DH-120WHPRJL10.7T14.5PMA750PDF · Model specifications and drawings — open PDF

Questions before ordering

Is 5 kW a continuous-power rating?

No. The specified peak power is 5 kW; average continuous-wave power is 750 W. Include pulse width and duty cycle if the signal is pulsed.

Can I order an I-style or U-style joint?

This listed model is L style. For another geometry, send a drawing showing the rotation axis and flange directions so the required configuration can be checked.