E78J
FLEXWELL® Standard Elliptical Waveguide

Name: FLEXWELL® Standard Elliptical Waveguide
SKU: E78J

Rev : C | 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

Standard

Jacket

J (Polyethylene black)

Electrical Specifications

Typical Operating Band

7.1 - 8.5 GHz

Max. VSWR / Return Loss	VSWRMAX	ReturnLossDB	LowerFrequency	UpperFrequency
	1.15	23.1

Cut-off Frequency

4.72 GHz

Mechanical Specifications

Weight

0.6kg/m (0.4lb/ft)

Minimum Bending Radius E Plane

200mm (8in)

Minimum Bending Radius H Plane

500mm (20in)

Minimum Bending Radius E Plane

250mm (10in)

Minimum Bending Radius H Plane

600mm (24in)

Maximum Twist

5m (1.5ft)

Max. Operating Pressure

0.5bar (7psi)

Max. Pulling Length per Hoisting Grip

100m (305ft)

Standard Hanger Spacing

0.9m (3ft)

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)
7.1	6.19	1.89	3.44	74.7	446.5	136.1
7.2	6.11	1.86	3.48	75.5	441.7	134.6
7.3	6.05	1.84	3.52	76.3	437.3	133.3
7.4	5.99	1.83	3.56	77	433.1	132
7.5	5.94	1.81	3.59	77.7	429.2	130.8
7.6	5.89	1.79	3.62	78.4	425.6	129.7
7.7	5.84	1.78	3.65	79	422.2	128.7
7.8	5.8	1.77	3.67	79.6	419	127.7
7.9	5.76	1.76	3.7	80.2	416	126.8
8	5.73	1.75	3.72	80.7	413.1	125.9
8.1	5.7	1.74	3.74	81.3	410.5	125.1
8.2	5.67	1.73	3.76	81.8	407.9	124.3
8.3	5.64	1.72	3.77	82.3	405.5	123.6
8.4	5.62	1.71	3.79	82.7	403.2	122.9
8.5	5.6	1.71	3.81	83.2	401.1	122.3