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Waveguide Attenuators

RF Com can offer a range of Low Power Fixed and Infinitely Variable Attenuators as well as the range of Laboratory Standard Precision Variable Attenuators.

These are a compact design and are manufactured from brass as standard although copper and aluminium versions are available upon request.

These Attenuators are manufactured with the full range of International flange styles and can be offered with alternative plated finishes on request.

All our attenuators are offered with a hard wearing, epoxy paint finish. Out manufacturing partners design and manufacturing facility is approved to ISO 9001: 2008.

Standard Rectangular Fixed Attenuator  (Range 0 - 40dB)

Material

Brass

Finish

Blue Paint, Silver Plated  Flanges

Full Band Flatness

Nominal 10% attenuator  value*

Width/Height

 

Operating
Frequency
Band [GHz]

Waveguide
Designation

PART NUMBER

Max
VSWR

Max
Power
Watts  CW

Overall
Length
[A]

UK
WG

IEC
R

EIA
WR

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, contact us.

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

 Width/Height

 products_attenuator_fattenuator03

 

Operating
Frequency
Band [GHz]

Waveguide
Designation

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, please contact us.

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

Ordering:- when ordering, please state the attenuation value and frequency. 
Please contact us for availability.

 

Variable Attenuator (Range 0 - 40dB)

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

Width/Height

 

Operating Frequency Band (GHz)

Waveguide Designation

PART NUMBER

Max V.S.W.R.

Max Power Watts C.W.

Overall Length “A” (mm)

Dim “B” (mm)

UK

WG

IEC

R

E.I.A.

WR

**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, please contact us.

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

** Please contact us availability

 

Variable Precision Attenuator (Range 0 - 40dB)

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

Width/Height

 

Operating Frequency Band (GHz)

Waveguide Designation

PART NUMBER

Max Power Watts C.W.

Micro-meter Resolution dB/div Average

Overall Length “A” (mm)

Dim “B” (mm)

UK

WG

IEC

R

E.I.A.

WR

**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, please contact us.

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 us for availability