50 – 75 GHz, Programmable Rotary Vane Attenuator

Applications

Mi-Wave’s 511 Series Programmable Rotary Vane Attenuators are used in microwave and millimeter-wave systems where precise, repeatable, and remotely controlled attenuation is required.

Fade Margin Testing of Microwave Radios

Used to simulate signal degradation and verify microwave radio link performance under varying path loss conditions.

Fade Margin Testing of Microwave Radio Equipment

Supports qualification and performance verification of complete radio systems by applying controlled attenuation over a wide dynamic range.

Remote RF Power Level Control

Ideal for automated systems where RF signal levels must be adjusted accurately from a remote controller or computer interface.

Instrumentation

Used with laboratory and production test instrumentation for controlled signal level management in RF and microwave measurement systems.

Automated Test Systems

Well suited for ATE and computer-controlled measurement platforms where repeatability, programmability, and compact integration are critical.

Calibration and Measurement Labs

Provides precise step attenuation for calibration workflows, component evaluation, and repeatable measurement setups.

Microwave and Millimeter-Wave R&D

Supports engineering development environments where fine attenuation control is needed across a wide frequency range.

Aerospace, Defense, and Communications Testing

Applicable to radar, communications, EW, and high-frequency subsystem testing where precise attenuation control and reliable automation are essential.

Frequently Asked Questions (FAQ)

What is a programmable rotary vane attenuator?

A programmable rotary vane attenuator is a waveguide attenuator that uses a rotary vane mechanism for RF attenuation and includes electronic control for manual or remote attenuation setting.

What frequency range does the 511 Series cover?

The 511 Series is available in full bands from 7.0 GHz to 325 GHz, supporting both microwave and millimeter-wave applications.

What is the attenuation range of the 511 Series?

The unit provides 0 to 70 dB of attenuation with fine 0.01 dB step resolution.

How can the 511 Series be controlled?

It can be controlled manually from the front panel or remotely through IEEE-488 (GPIB) or USB interfaces.

Does the attenuator include a display?

Yes. A digital front panel readout displays the programmed attenuation setting for easy monitoring and local adjustment.

What power source does the 511 Series require?

The unit operates from a single +24 VDC source and is also available with an optional adapter.

What makes the 511 Series suitable for automated test systems?

Its remote programmability, fine step resolution, compact integrated design, and high cycle life make it ideal for automation and repetitive measurement environments.

Is the 511 Series designed for long-term use?

Yes. These attenuators have been tested to over 1 million cycles, supporting reliable long-term operation.

Glossary of Programmable Rotary Vane Attenuator Terms

Attenuator Fundamentals

Programmable Attenuator
An attenuator that allows attenuation levels to be set electronically, either locally or through a remote interface.

Rotary Vane Attenuator
A waveguide attenuator that uses a rotating vane structure to vary attenuation while maintaining controlled RF performance.

Precision Attenuator
An attenuator designed for accurate, repeatable signal reduction in calibration, instrumentation, and test environments.

Waveguide Attenuator
An attenuator used in rectangular waveguide systems to control RF power at microwave and millimeter-wave frequencies.

Electrical Performance

Attenuation Range
The span of attenuation values the device can provide, such as 0 to 70 dB.

Resolution
The smallest programmable attenuation increment. For the 511 Series, this is 0.01 dB.

Insertion Loss
The signal loss introduced by a component in addition to the intended attenuation.

Mode-Free Operation
Operation without unwanted waveguide mode generation that could degrade performance or measurement accuracy.

High Power Handling
The ability of an attenuator to operate reliably at elevated RF power levels without damage or unstable performance.

RF and Frequency

Radio Frequency (RF)
Electromagnetic signals used for communications, sensing, and measurement.

Microwave Frequencies
Frequencies generally spanning 1 GHz to 30 GHz.

Millimeter-Wave (mmWave)
Frequencies from 30 GHz to 300 GHz.

Frequency Coverage
The operating span of frequencies supported by the attenuator.

Full Waveguide Bands
Standardized waveguide frequency bands covering the full operating range for each waveguide size.

Interfaces and Control

Front Panel Control
Local operation of the attenuator using onboard controls and display functions.

Digital Readout
An electronic front panel display that shows the programmed attenuation value.

Remote Control
Electronic operation of the attenuator from an external computer or control system.

IEEE-488 (GPIB)
A standard instrumentation interface commonly used in automated laboratory and test equipment systems.

USB Interface
A standard digital communication interface used for local computer-based remote control.

USB-GPIB Interface
An interface option that bridges USB-based control systems with GPIB-compatible instrumentation workflows.

System and Applications

Fade Margin Testing
A test method used to evaluate how much signal loss a communication system can tolerate before performance degrades.

Microwave Radio Testing
Performance evaluation of radio equipment operating in microwave frequency bands.

Instrumentation
Test and measurement equipment used to characterize RF and microwave components and systems.

Automated Test Equipment (ATE)
Computer-controlled systems used to perform repeatable testing of electronic and RF devices.

Calibration
The process of verifying system accuracy using known reference values and controlled measurement conditions.

Engineering Concepts

Signal Level Control
The adjustment of RF power to a desired level within a system or test setup.

System Integration
Combining the attenuator with other RF, microwave, and control components into a complete operating system.

Cycle Life
The number of operation cycles a device can perform reliably over its service life.

Compact Integrated Design
A design approach that combines multiple functional elements, such as microwave hardware and electronic control, into a single package.

Note: Our website contains just a few types of  Attenuators we build. Consult with us for your specific needs.