Fixed and Variable Waveguide Attenuators

Waveguide Attenuators

The Waveguide Solution offers a range of Low Power Fixed and Infinitely Variable Attenuators as well as the range of Laboratory Standard Precision Variable Attenuators. All items are of compact design and are manufactured from brass as standard although copper and aluminium versions are available upon request. The FA and VA series of attenuators are manufactured to the highest quality standards. Attenuators are manufactured with the full range of International flange styles as shown in The Waveguide Solution flange catalogue and can be offered with alternative plated finishes on request. All The Waveguide Solution attenuators are offered with attractive hardwearing, epoxy paint finish. The Waveguide Solution's design and manufacturing facility is approved to ISO 9001: 2000.

Standard Rectangular Fixed Attenuator (Range 0 - 40dB)
Material	Brass
Finish	Blue Paint, Silver Plated Flanges
Full Band Flatness	Nominal 10% attenuator value*

Operating Frequency Band [GHz]	Waveguide Designation			TWS PART NUMBER	Max VSWR	Max Power Watts CW	Overall Length [A]
Operating Frequency Band [GHz]	UK WG	IEC R	EIA WR	TWS PART NUMBER	Max VSWR	Max Power Watts CW	Overall Length [A]
2.60 - 3.95	10	32	284	FA 10-SQB-[*-]-B-[*]	1.10	4	330
3.30 - 4.90	11A	40	229	FA 11A-SQB-[*-]-B-[*]	1.10	4	406
3.95 - 5.85	12	48	187	FA 12-SQB-[*-]-B-[*]	1.12	4	305
4.90 - 7.05	13	58	159	FA 13-SQB-[*-]-B-[*]	1.12	3	280
5.85 - 8.20	14	70	137	FA 14-SQB-[*-]-B-[*]	1.12	2	241
7.05 - 10.0	15	84	112	FA 15-SQB-[*-]-B-[*]	1.13	1	203
8.20 - 12.40	16	100	90	FA 16-SQB-[*-]-B-[*]	1.13	1	152
10.0 - 15.0	17	120	75	FA 17-SQB-[*-]-B-[*]	1.14	1	152
12.4 - 18.0	18	140	62	FA 18-SQB-[*-]-B-[*]	1.14	0.7	127
15.0 - 22.0	19	180	51	FA 19-SQB-[*-]-B-[*]	1.15	0.7	127
18.0 - 26.5	20	220	42	FA 20-SQB-[*-]-B-[*]	1.15	0.5	102
26.5 - 40.0	22	320	28	FA 22-SQB-[*-]-B-[*]	1.20	0.5	102
* Better flatness value can be achieved for narrow band application. Attenuation Fixed according to customer requirements at any value within the overall attenuation range. * For 3 Digit Rectangular Flange part number, refer to the TWS Flange Catalogue, or consult the factory.

Attenuation calibration accuracy better than ± 0.35 dB at the centre frequency.
Ordering:- when ordering, please state the attenuation value and frequency.

Double Ridge Fixed Attenuator (Range 0 - 40dB)
Material	Aluminium alloy
Finish	Blue Paint, iridited / chromated flanges
Full Band Flatness	Contact factory for details

Operating Frequency Band [GHz]	Waveguide Designation	TWS PART NUMBER	Max VSWR	Max Power Watts CW	Overall Length [A]
6.5 - 18.0	WRD650 D28	FA 650-CQH-[*-]-A-[*]	1.15	0.7	152
7.5 - 18.0	WRD750 D24	FA 750-CQH-[*-]-A-[*]	1.15	0.7	152
18.0 - 40.0	WRD180 C24	FA 180-CQH-[*-]-A-[*]	1.25	0.5	51
Attenuation Fixed according to customer requirements at any value within the overall attenuation range. * For 3 Digit Rectangular Flange part number, refer to the TWS Flange Catalogue, or consult the factory.

Attenuation calibration accuracy better than ± 0.6 dB at the centre frequency.

Ordering:- when ordering, please state the attenuation value and frequency.
++ Please consult the factory for availability

Variable Attenuator (Range 0 - 40dB)

Standard Rectangular
Specification:
Material	Brass
Finish	Blue paint, Silver plated flanges
Attenuation Element	Resistive card
insertion loss	less than 0.3dB
Full band flatness: Contact factory for details

Operating Frequency Band (GHz)	Waveguide Designation			TWS PART NUMBER	Max V.S.W.R.	Max Power Watts C.W.	Overall Length “A” (mm)	Dim “B” (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)	Dim “B” (mm)
**2.60 – 3.95	10	32	284	VA 10 –SQB- (*-*)-B	1.10	4	330	178
3.30 – 4.90	11A	40	229	VA 11A –SQB- (*-*)-B	1.10	4	406	171
3.95 – 5.85	12	48	187	VA 12 –SQB- (*-*)-B	1.12	4	305	76
**4.90 – 7.05	13	58	159	VA 13 –SQB- (*-*)-B	1.12	3	279	102
5.85 – 8.20	14	70	137	VA 14 –SQB- (*-*)-B	1.12	2	241	105
7.05 – 10.0	15	84	112	VA 15 –SQB- (*-*)-B	1.13	1	203	89
8.20 – 12.40	16	100	90	VA 16 –SQB- (*-*)-B	1.13	1	152	89
10.0 – 15.0	17	120	75	VA 17 –SQB- (*-*)-B	1.14	1	152	87
12.4 – 18.0	18	140	62	VA 18 –SQB- (*-*)-B	1.14	0.7	127	76
15.0 – 22.0	19	180	51	VA 19 –SQB- (*-*)-B	1.15	0.7	127	76
18.0 – 26.5	20	220	42	VA 20 –SQB- (*-*)-B	1.15	0.5	102	70
26.5 – 40.0	22	320	28	VA 22 –SQB- (*-*)-B	1.20	0.5	51	60
*** For 3 Digit Rectangular Flange part number, refer to the TWS Flange catalogue, or consult the factory.

Attenuation calibration accuracy better than ±0.35 db at the centre frequency

** Please contact factory for availability

Variable Precision Attenuator (Range 0 - 40dB)

Standard Rectangular Micrometer Drive
Specification:
Material	Brass
Finish	Blue paint, Silver plated flanges
Attenuation Element	Resistive card
insertion loss	less than 0.2dB
Resetting accuracy	±0.01dB
Full band flatness: Contact factory for details

Operating Frequency Band (GHz)	Waveguide Designation			TWS PART NUMBER	Max Power Watts C.W.	Micro-meter Resolution dB/div Average	Overall Length “A” (mm)	Dim “B” (mm)
Operating Frequency Band (GHz)	UK WG	IEC R	E.I.A. WR	TWS PART NUMBER	Max Power Watts C.W.	Micro-meter Resolution dB/div Average	Overall Length “A” (mm)	Dim “B” (mm)
**2.60 – 3.95	10	32	284	VA 10 – PQB- (*-*)-B	4	0.01	330	267
3.30 – 4.90	11A	40	229	VA 11A – PQB- (*-*)-B	4	0.02	406	194
3.95 – 5.85	12	48	187	VA 12 – PQB- (*-*)-B	4	0.02	305	219
**4.90 – 7.05	13	58	159	VA 13 – PQB- (*-*)-B	3	0.02	279	200
5.85 – 8.20	14	70	137	VA 14 – PQB- (*-*)-B	2	0.03	241	165
7.05 – 10.0	15	84	112	VA 15 – PQB- (*-*)-B	1	0.04	203	165
8.20 – 12.40	16	100	90	VA 16 – PQB- (*-*)-B	1	0.05	152	127
10.0 – 15.0	17	120	75	VA 17 – PQB- (*-*)-B	1	0.05	152	127
12.4 – 18.0	18	140	62	VA 18 – PQB- (*-*)-B	0.7	0.07	127	120
18.0 – 26.5	20	220	42	VA 20 – PQB- (*-*)-B	0.5	0.10	102	113
26.5 – 40.0	22	320	28	VA 22 – PQB- (*-*)-B	0.2	0.07	51	90
*** For 3 Digit Rectangular Flange part number, refer to the TWS Flange catalogue, or consult the factory.

CALIBRATION CALIBRATION ACCURACY

3 Frequencies in Band 0 – 10 dB ± 0.07 dB

1 dB Steps to 10 dB 10 – 20 dB ± 0.1 dB

2 dB Steps to 20 dB 20 – 30 dB ± 0.2 dB

5 dB Steps to 40 dB 30 – 40 dB ± 0.25 dB

** Please contact factory for availability


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