EP185J
FLEXWELL® Premium Elliptical Waveguide

Name: FLEXWELL® Premium Elliptical Waveguide
SKU: EP185J

Rev : D | Rev date : 15 Nov 2025

FLEXWELL® elliptical waveguide is constructed of longitudinally continuous seam welded, highly conductive copper tube, corrugated and precision formed into an elliptical cross section. It is manufactured in continuous lengths using a special seam welding process developed by the RFS organization.

The corrugation design achieves high transverse stability, flexibility and crush strength for superior handling and forming at an installation. The inherent strength and flexibility of FLEXWELL® waveguide allows on location, a continuous length of waveguide to be run directly from a tower-mounted antenna to the equipment building.

A FLEXWELL® elliptical waveguide feeder requires less planning and reduces installation costs when compared to a feeder system using a rigid rectangular waveguide.
FLEXWELL® waveguide is available cut to length with factory attached connectors or in continuous lengths for termination in the field.

Feature / Benefits

Designed for optimum system performance
Excellent electrical performance
Low loss and low VSWR (low return loss)
Electrical test made on every waveguide during manufacturing
Every waveguide undergoes 24 hour pressure test
Reduced installation cost compared to rigid rectangular waveguides due to flexibility
No need of flange joints, twist section and bends
Easy transportation in coils or on drums
Cutting at exact length and connectorizing in the field

General Specifications

Performance

Premium

Jacket

J (Polyethylene black)

Electrical Specifications

Typical Operating Band

17.3 - 19.7 GHz

Max. VSWR / Return Loss	VSWRMAX	ReturnLossDB	LowerFrequency	UpperFrequency
	1.083	28

Cut-off Frequency

11.06 GHz

Mechanical Specifications

Weight

0.23kg/m (0.15lb/ft)

Minimum Bending Radius E Plane

130mm (5in)

Minimum Bending Radius H Plane

280mm (11in)

Minimum Bending Radius E Plane

130mm (5in)

Minimum Bending Radius H Plane

300mm (12in)

Maximum Twist

8m (2.4ft)

Max. Operating Pressure

0.5bar (7psi)

Max. Pulling Length per Hoisting Grip

100m (305ft)

Standard Hanger Spacing

0.6m (2ft)

Temperature Specifications

Installation Temperature

-40°C to 60°C (-40°F to 140°F)

Storage Temperature

-70°C to 85°C (-94°F to 185°F)

Operation Temperature

-50°C to 85°C (-58°F to 185°F)

Attenuation and Power Rating

Frequency (GHz)	Attenuation dB/100m	Attenuation dB/100ft	Avarage Power (KW)	Group velocity (%c)	Group Delay (ns/100m)	Group Delay (ns/100ft)
17.3	20.25	6.17	0.49	76.9	433.8	132.2
17.4	20.17	6.15	0.49	77.2	432.1	131.7
17.5	20.09	6.12	0.5	77.5	430.4	131.2
17.6	20.01	6.1	0.5	77.8	428.8	130.7
17.7	19.94	6.08	0.5	78.1	427.2	130.2
17.8	19.86	6.05	0.5	78.4	425.7	129.8
17.9	19.8	6.03	0.5	78.6	424.2	129.3
18	19.73	6.01	0.51	78.9	422.8	128.9
18.1	19.66	5.99	0.51	79.2	421.4	128.4
18.2	19.6	5.97	0.51	79.4	420	128
18.3	19.54	5.96	0.51	79.7	418.7	127.6
18.4	19.48	5.94	0.51	79.9	417.4	127.2
18.5	19.43	5.92	0.51	80.2	416.1	126.8
18.6	19.37	5.9	0.51	80.4	414.9	126.5
18.7	19.32	5.89	0.52	80.6	413.7	126.1
18.8	19.27	5.87	0.52	80.9	412.5	125.7
18.9	19.22	5.86	0.52	81.1	411.4	125.4
19	19.17	5.84	0.52	81.3	410.2	125
19.1	19.12	5.83	0.52	81.5	409.1	124.7
19.2	19.08	5.82	0.52	81.7	408.1	124.4
19.3	19.04	5.8	0.52	82	407	124.1
19.4	18.99	5.79	0.52	82.2	406	123.8
19.5	18.95	5.78	0.53	82.4	405	123.4
19.6	18.91	5.76	0.53	82.6	404	123.2
19.7	18.88	5.75	0.53	82.8	403.1	122.9