Attenuators

We offer a range of Low Power Fixed and Infinitely Variable Attenuators as well as the range of Laboratory Standard Precision Variable Attenuators. Download the specifications for all our available... Read full description

SKU: Attenuator

Categories: Waveguides

Description

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

Download the specifications for all our available attenuators or view the range below.

Waveguide Attenuators - low power

We offer 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 flange catalogue and can be offered with alternative plated finishes on request. All our attenuators are offered with attractive hardwearing, epoxy paint finish. Our design and manufacturing facility is approved to ISO 9001: 2008.

 

Standard Rectangular Fixed Attenuator  (Range 0 - 40dB)

Standard Rectangular Fixed Attenuator diagram

Material: Brass
Finish: Blue Paint, Brass  Flanges
Full Band Flatness: Nominal 10% attenuator alue (better flatness value can be achieved for narrow band application)

These attenuators use a shaped lossy element attached to the waveguide wall, alternative materials can be used if higher power handling is required - please contact our sales team with details of your requirements.

Operating
Frequency
Band [GHz]
Waveguide
Designation
Max
VSWR
Max
Power
Watts CW
Overall
Length
[A]
UK
WG
IEC
R
EIA
WR
2.60 - 3.95 10 32 284 1.10 4 330
3.30 - 4.90 11A 40 229 1.10 4 406
3.95 - 5.85 12 48 187 1.12 4 305
4.90 - 7.05 13 58 159 1.12 3 280
5.85 - 8.20 14 70 137 1.12 2 241
7.05 - 10.0 15 84 112 1.13 1 203
8.20 - 12.40 16 100 90 1.13 1 152
10.0 - 15.0 17 120 75 1.14 1 152
12.4 - 18.0 18 140 62 1.14 0.7 127
15.0 - 22.0 19 180 51 1.15 0.7 127
18.0 - 26.5 20 220 42 1.15 0.5 102
26.5 - 40.0 22 320 28 1.20 0.5 102

Attenuation calibration accuracy better than ± 0.35 dB or ± 2.5% (whichever is greater) at the centre  frequency.
Ordering: when ordering, please state the attenuation value and frequency.

 

Double ridged Fixed Attenuator  (Range 0 - 40dB)

Standard Rectangular Fixed Attenuator diagram

Material: Aluminium alloy
Finish: Blue Paint, iridited  flanges
Full Band Flatness: contact our sales team with details of your requirements.

Attenuation calibration accuracy better than ± 0.6 dB or ±2.5% (whichever is greater) at the centre frequency.
Ordering:- when ordering, please state the attenuation value and frequency.
Please consult our sales team for availability.

Ordering Information

Fixed attenuators

Example: FA 16 S Q Z 402 402 B 10

  • FA
    • Product code:
      Fixed attenuator
  • 16
    • Waveguide size:
      British WG size for rectangular waveguide or MIL spec. WRD size for double ridge waveguide
      e.g. 16 = WG16; 750 = WRD750
  • S
    • Type:
      S = Standard
  • Q
    • Paint:
      Q = TWS blue (preferred)
      B = black
      G = grey
  • Z
    • Finish:
      Z = unplated (preferred for brass / copper)
      M = passivate (option for brass)
      F = Iridite (preferred for aluminium)
      H = chromate
      A = tin
      B = silver
  • 402
    • Flange type (end1):
      Last 3 digits from the TWS flange part no.
      e.g. 402 = UBR flange
  • 402
    • Flange type (end2):
      Last 3 digits from the TWS flange part no.
      e.g. 402 = UBR flange
  • B
    • Material:
      A = aluminium
      B = brass
      C = copper
  • 10
    • Attenuation value:
      “0 -40dB
      e.g. 10 = 10dB

 

Variable Attenuator (Range 0 - 40dB)

Variable Attenuator diagram

Standard Rectangular

Specification:
Material: Brass
Finish: Blue paint, brass flanges
Attenuation Element: Resistive card
Insertion loss: less than 0.3dB
Full band flatness: contact our sales team with details of your requirements

Note that this attenuator is intended for padder applications and does not come with a calibration chart.

*** For 3 Digit Rectangular Flange part number, refer to the TWS Flange catalogue, or consult the factory.

** Please contact our sales team for availability
Attenuation calibration accuracy better than ±0.35 db at the centre frequency

 

Variable Precision Attenuator (Range 0 - 40dB)

Variable Precision Attenuator diagram

Standard Rectangular Micrometer Drive

Specification:
Material: Brass
Finish: Blue paint, Brass flanges
Attenuation Element: Resistive card
Insertion loss: less than 0.2dB
Resetting accuracy: ±0.01dB
Full band flatness: Contact our sale team for details

Supplied with a calibration chart

Operating Frequency Band (GHz) Waveguide Designation 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 4 0.01 330 267
3.30 – 4.90 11A 40 229 4 0.02 406 194
3.95 – 5.85 12 48 187 4 0.02 305 219
**4.90 – 7.05 13 58 159 3 0.02 279 200
5.85 – 8.20 14 70 137 2 0.03 241 165
7.05 – 10.0 15 84 112 1 0.04 203 165
8.20 – 12.40 16 100 90 1 0.05 152 127
10.0 – 15.0 17 120 75 1 0.05 152 127
12.4 – 18.0 18 140 62 0.7 0.07 127 120
18.0 – 26.5 20 220 42 0.5 0.10 102 113
26.5 – 40.0 22 320 28 0.2 0.07 51 90

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 our sales team for availability

Ordering Information

Variable attenuators

Example: VA 16 S Q Z 402 402 B 10

  • VA
    • Product code:
      Variable attenuator
  • 16
    • Waveguide size:
      British WG size for rectangular waveguide or MIL spec. WRD size for double ridge waveguide
      e.g. 16 = WG16; 750 = WRD750
  • S
    • Type:
      P = Precision
      S = Standard
  • Q
    • Paint:
      Q = TWS blue (preferred)
      B = black
      G = grey
  • Z
    • Finish:
      Z = unplated (preferred for brass / copper)
      M = passivate (option for brass)
      F = Iridite (preferred for aluminium)
      H = chromate
      A = tin
      B = silver
  • 402
    • Flange type (end1):
      Last 3 digits from the flange part no.
      e.g. 402 = UBR flange
  • 402
    • Flange type (end2):
      Last 3 digits from the flange part no.
      e.g. 402 = UBR flange
  • B
    • Material:
      A = aluminium (standard for double ridge)
      B = brass (standard for rectangular waveguide

Waveguide Attenuators - medium power

These are constructed from waveguide coupler elements with an load (depending on the power required) on the through arm. They are usually made to customer requirements so please contact our sales team with details of your specifications.

Waveguide Attenuators - high power

High power attenuators use the classic configuration of two 3dB hybrids and a phase shifter. Together with a high and “low” power load, the transmitted power can be infinitely adjusted. The phase shifter is made from twin ganged sliding shorts and 3dB hybrid for maximum power handling. Please contact our sales team with details of your specifications.

For more details and prices please use the product enquiry form or contact our sales team.

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