Page 1
Model Frequency Waveguide Maximum Maximum Maximum Dimensions (mm) Weight Model
Range (GHz) VSWR Insertion Power (kg)
WG R WR Loss (dB) (watts) A B C D E
10110 2.60 - 2.61 10 32 284 1.15 0.5 12 935 358 198 88.2* 108 28 10110
11A110 3.30 - 4.90 11A 40 229 1.15 0.5 10 687 340 156 81.2* 85 13 11A110
12110 3.94 - 5.99 12 48 187 1.15 0.5 10 560 244 149 66/75 58 8.5 12110
13110 4.64 - 7.05 13 58 159 1.15 0.5 9 520 244 149 66/75 58 8.0 13110
14110 5.38 - 8.18 14 70 137 1.15 0.5 8 420 244 149 66/75 58 6.0 14110
15110 6.58 - 10.0 15 84 112 1.15 0.5 6 340 226 119 45/54 44 4.0 15110
16110 8.20 - 12.5 16 100 90 1.15 0.5 4 300 226 119 45/54 44 3.8 16110
17110 9.84 - 15.0 17 120 75 1.15 0.5 3 276 226 119 45/54 44 3.8 17110
18110 11.9 - 18.0 18 140 62 1.15 0.5 2 250 226 119 45/54 44 3.4 18110
19110 14.5 - 22.0 19 180 51 1.15 0.5 2 250 226 119 45/54 44 3.4 19110
20110 17.6 - 26.7 20 220 42 1.15 0.8 1 250 226 119 45/54 44 3.3 20110
21110 21.7 - 33.0 21 260 34 1.15 0.8 1 225 226 119 45/54 44 3.2 21110
22110 26.4 - 40.1 22 320 28 1.15 1.0 0.7 174 227 119 55/64 36 2.5 22110
23110 33.0 - 50.1 23 400 22 1.15 1.0 0.7 140 227 119 55/64 36 2.5 23110
24110 39.3 - 59.7 24 500 19 1.15 1.0 0.7 134 227 119 55/64 36 2.3 24110
25110 49.9 - 75.8 25 620 15 1.15 1.0 0.5 100 227 119 55/64 36 2.3 25110
26110 60.5 - 92.0 26 740 12 1.15 1.5 0.3 89 227 119 55/64 36 2.3 26110
27110 73.8 - 112.0 27 900 10 1.15 1.5 0.3 89 227 119 55/64 36 2.3 27110
28110 92.3 -140 28 1200 8 1.20 2.0 0.2 89 227 119 55/64 36 2.3 28110
Rotary Vane Attenuators
Series 110 - The Industry Standard
For Programmable Vane Rotary Attenuators see page 6-9
Features
• 1% accuracy
• 0 - 60 dB
• Direct Reading
• Unsurpassed Reliability
Flann Precision Rotary Vane Attenuators
are considered by many to represent
the ‘Industry Standard’ in precision
waveguide attenuators, offering high
accuracy and unsurpassed repeatability
and reliability.
The Rotary Vane Attenuator is the
ideal instrument for use in waveguide
systems where broadband direct reading
of attenuation is required, particularly as
a standard for reflectometer and swept
systems.
The Flann Rotary Vane Attenuator
consists of a rotating circular waveguide
section flanked by a pair of low VSWR
rectangular to circular transitions. The
three waveguide sections are fitted with
stable high attenuation elements which
ensure close agreement of the attenuation
characteristic to the theoretical law. The
attenuation is directly related to the relative
angular position of the attenuating element
in the centre section (Ø) and can be seen
to follow the law 40 log (sec Ø). The
attenuation is insensitive to frequency;
variations of phase with attenuation are
negligible. Choking of the rotating joints
is employed to minimise RF leakage
whilst sound mechanical design ensures
the instruments are free from backlash.
A precision 10 turn, 75 mm diameter
helical drum scale provides extremely high
resolution as the table below indicates:-
By using high value attenuation markings
on the scale, symmetrically positioned
about the maximum attenuation position,
the user is able to verify the attenuation
characteristic alignment which gives the
highest confidence in the accuracy of
subsequent measurements.
Custom Built Units:-
Special attenuators can be supplied with
a calibration range in excess of 60 dB.
Combined rotary vane attenuator and
rotary vane phase changer units are also
available; these units are usually coupled
at the circular waveguide section thereby
minimising mismatch errors at low
attenuation settings.
Model 24110
Series 110
Discrimination of the drum scale
over a 0 to 60 dB attenuation range
* Non-adjustable mounting feet
ORDERING INFORMATION
Model: Description
Example: Model 16110 Rotary Vane Attenuator
C
A
B
D
Attenuation scale
range
Scale
increment
1-4dB 4-30dB 30-40dB 40-60dB
0.0 1dB 0.1dB 0.2dB 0.5dB
16
E
www.flann.com
For standard flange types and recommendations see pages 108 onwards
Attenuation Range 0 to 60 dB
Attenuation accuracy 0.1 or 1% of reading, whichever is the greater
(except Model 06110 - 0.2 dB or 2%, whichever is the greater)
Specifications
Loading...