Low, Medium and High Power Waveguide Loads and Terminations

Standard Fixed Loads

The waveguide loads devices are manufactured from selected waveguide tube. The flange interface is precisely controlled to offer the optimum performance.

Sliding Loads

The standard sliding loads are assembled in the same way as the standard fixed loads using selected waveguide tube and precise positioning of the flange interface. Operation of the sliding element is by a push/pull mechanism and a locking screw is provided for repetitive measurements.

High Power Loads

Designs for a limited range of rectangular high power/medium power loads are available on request.

Sliding Loads

Standard Rectangular
Specification:
V.S.W.R.	See table (based on spot frequency operation)
Material:	Brass
Load material	Iron loaded resin
Finish	Blue paint, silver plated flanges

Operating Frequency Band (GHz)	Waveguide Designation			TWS PART NUMBER	Max V.S.W.R.	Max Power Watts C.W.	Overall Length “A” (mm)
Operating Frequency Band (GHz)	UK WG	IEC R	E.I.A. WR	TWS PART NUMBER	Max V.S.W.R.	Max Power Watts C.W.	Overall Length “A” (mm)
2.60 – 3.95	10	32	284	SL 10 –SQB- (***)-B	1.01	3	790
3.30 – 4.90	11A	40	229	SL 11A –SQB- (***)-B	1.01	2	526
3.95 – 5.85	12	48	187	SL 12 –SQB- (***)-B	1.01	2	414
4.90 – 7.05	13	58	159	SL 13 –SQB- (***)-B	1.01	2	332
5.85 – 8.20	14	70	137	SL 14 –SQB- (***)-B	1.01	1	336
7.05 – 10.0	15	84	112	SL 15 –SQB- (***)-B	1.01	1	323
8.20 – 12.40	16	100	90	SL 16 –SQB- (***)-B	1.01	0.8	331
10.0 – 15.0	17	120	75	SL 17 –SQB- (***)-B	1.01	0.8	321
12.4 – 18.0	18	140	62	SL 18 –SQB- (***)-B	1.01	0.6	321
15.0 – 22.0	19	180	51	SL 19 –SQB- (***)-B	1.02	0.6	225
18.0 – 26.5	20	220	42	SL 20 –SQB- (***)-B	1.02	0.6	107
22.0 – 33.0	21	260	34	SL 21 –SQB- (***)-B	1.02	0.6	107
26.5 – 40.0	22	320	28	SL 22 –SQB- (***)-B	1.035	0.5	100
*** For 3 Digit Rectangular Flange part number, refer to the Flange Catalogue, or consult the factory.

Fixed Loads

Standard Rectangular
Specification:
Material:	Brass
Load material	Iron loaded resin
Finish	Blue paint, silver plated flanges

Operating Frequency Band (GHz)	Waveguide Designation			TWS PART NUMBER	Max V.S.W.R.	Max Power Watts C.W.	Overall Length “A” (mm)
Operating Frequency Band (GHz)	UK WG	IEC R	E.I.A. WR	TWS PART NUMBER	Max V.S.W.R.	Max Power Watts C.W.	Overall Length “A” (mm)
2.60 – 3.95	10	32	284	FL 10 –SQB- (***)-B	1.02	5	540
3.30 – 4.90	11A	40	229	FL 11A –SQB- (***)-B	1.02	4	440
3.95 – 5.85	12	48	187	FL 12 –SQB- (***)-B	1.02	3.5	407
4.90 – 7.05	13	58	159	FL 13 –SQB- (***)-B	1.02	3.5	350
5.85 – 8.20	14	70	137	FL 14 –SQB- (***)-B	1.02	2	305
7.05 – 10.0	15	84	112	FL 15 –SQB- (***)-B	1.02	2	250
8.20 – 12.40	16	100	90	FL 16 –SQB- (***)-B	1.02	1.3	210
10.0 – 15.0	17	120	75	FL 17 –SQB- (***)-B	1.02	1.3	195
12.4 – 18.0	18	140	62	FL 18 –SQB- (***)-B	1.02	1	169
15.0 – 22.0	19	180	51	FL 19 –SQB- (***)-B	1.025	1	150
17.7 – 26.5	20	220	42	FL 20 –SQB- (***)-B	1.035	0.8	128
22.0 – 33.0	21	260	34	FL 21 –SQB- (***)-B	1.035	0.8	128
26.5 – 40.0	22	320	28	FL 22 –SQB- (***)-B	1.05	0.6	100
*** For 3 Digit Rectangular Flange part number, refer to the Flange Catalogue, or consult the factory.

Double Ridge
Specification:
Material:	Aluminium
Load material	Iron loaded resin
Finish	Blue paint, chromated / iridited flanges

Operating Frequency Band (GHz)	Waveguide Designation	TWS Part Number	Max V.S.W.R.		Max Power Watts C.W.	Overall Length “A” (mm)
4.75 – 11.0	WRD475 D24	FL 10 –SQH- (***)-B		1.04	11	386
5.8 – 16.0	WRD580 D28	FL 11A –SQH- (***)-B		1.04	8	300
6.5 – 18.0	WRD650 D28	FL 12 –SQH- (***)-B		1.05	7	252
7.5 – 18.0	WRD750 D24	FL 13 –SQH- (***)-B		1.05	7	237
18.0 – 40.0	WRD180 C24	FL 14 –SQH- (***)-B		1.06	5	128
*** For 3 digit Double Ridge Waveguide Flange Part number, please consult the factory.

High Power Fixed Loads

The range of high power waveguide loads is continually being expanded. The power rating depends on the waveguide size ambient temperatures and the fin area available, (e.g. the two WG17 loads shown below have power ratings of 800W and 500W and the WG10 load 2000W), but for very high power requirements, either multiple load elements and internal power splitters or a custom load element is designed in house for optimum heat distribution. All load elements are made from silicon carbide which is thermally bonded to the heatsink and have a match better than 1.1:1.







	The majority of loads have optimum heat dissipation when mounted horizontally, but fin arrangements are also available for vertical mounting if necessary. Please consult the factory for higher power ratings and support bracketry.

Operating Frequency Band (GHz)	Waveguide Designation			TWS PART NUMBER	Max V.S.W.R.
Operating Frequency Band (GHz)	UK WG	IEC R	E.I.A. WR	TWS PART NUMBER	Max V.S.W.R.
2.60 – 3.95	10	32	284	FL 10 –HBH- (***)-B	1.1
3.30 – 4.90	11A	40	229	FL 11A –HBH- (***)-B	1.1
3.95 – 5.85	12	48	187	FL 12 –HBH- (***)-B	1.1
4.90 – 7.05	13	58	159	FL 13 –HBH- (***)-B	1.1
5.85 – 8.20	14	70	137	FL 14 –HBH- (***)-B	1.1
7.05 – 10.0	15	84	112	FL 15 –HBH- (***)-B	1.1
8.20 – 12.40	16	100	90	FL 16 –HBH- (***)-B	1.1
10.0 – 15.0	17	120	75	FL 17 –HBB- (***)-B	1.1
12.4 – 18.0	18	140	62	FL 18 –HBB- (***)-B	1.1
18.0 – 26.5	20	220	42	FL 20 –HBB- (***)-B	1.1
26.5 – 40.0	22	320	28	FL 22 –HBB- (***)-B	1.1
*** For 3 Digit Rectangular Flange part number, refer to the TWS Flange catalogue, or consult the factory.

[Home] [Terrestrial Link components] [SatCom components] [Waveguide to co-ax adapters] [Tee Junctions] [Loads and terminations] [Pressure Windows] [Fixed and variable Attenuators] [Horn Antennas] [Taper transitions] [Flanges] [Directional Couplers] [Straights, Twists and Bends] [Flexible Waveguide] []