Product Image

Attenuators (Fixed or Variable)

Attenuators - low power

Attenuators - medium power

Attenuators - high power

Waveguide Attenuators - low power

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: 2008.

Standard Rectangular Fixed Attenuator  (Range 0 - 40dB)

Material: Brass
Finish: Blue Paint, Brass  Flanges
Full Band Flatness: Nominal 10% attenuator  value*

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 the factory.
* Better flatness value can be achieved for  narrow band application

Operating
Frequency
Band [GHz]
Waveguide
Designation
Max
VSWR
Max
Power
Watts  CW
Overall
Length
[A]
UK
WG
IEC
R
EIA
WR
2.60 - 3.9510322841.104330
3.30 - 4.9011A402291.104406
3.95 - 5.8512481871.124305
4.90 - 7.0513581591.123280
5.85 - 8.2014701371.122241
7.05 - 10.015841121.131203
8.20 - 12.4016100901.131152
10.0 - 15.017120751.141152
12.4 - 18.018140621.140.7127
15.0 - 22.019180511.150.7127
18.0 - 26.520220421.150.5102
26.5 - 40.022320281.200.5102

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)

Material: Aluminium alloy
Finish: Blue Paint, iridited  flanges
Full Band Flatness: Contact factory for details

Ordering Information - fixed attenuators

FA

Product code
FA = 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
More

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
More

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)

Standard Rectangular

Specification:
Material: Brass
Finish: Blue paint, brass flanges
Attenuation Element: Resistive card
Insertion loss: less than 0.3dB
Full band flatness: Contact factory for details

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

Variable Precision Attenuator (Range 0 - 40dB)

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 factory for details

Supplied with a calibration chart

 

Operating Frequency Band (GHz)Waveguide DesignationMax Power Watts C.W.Micro-meter Resolution dB/div AverageOverall Length “A” (mm)Dim “B” (mm)
UK WGIEC RE.I.A. WR
**2.60 – 3.95103228440.01330267
3.30 – 4.9011A4022940.02406194
3.95 – 5.85124818740.02305219
**4.90 – 7.05135815930.02279200
5.85 – 8.20147013720.03241165
7.05 – 10.0158411210.04203165
8.20 – 12.40161009010.05152127
10.0 – 15.0171207510.05152127
12.4 – 18.018140620.70.07127120
18.0 – 26.520220420.50.10102113
26.5 – 40.022320280.20.075190

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

Ordering Information - variable attenuators

VA

Product code
VA = 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
More

S

Type
P = precision, calibrated
S = standard

Q

Paint
Q = TWS blue (preferred)
B = black
G grey

Z

Finish
Z = unplated (preferred for brass)
M = passivate (option for brass)
F = Iridite (preferred for aluminium)
H = chromate
A = tin
B = silver
More

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 (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 the factory.

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 the factory