LA series RF Attenuators

AR RF / Microwave Instrumentation

The AR LA series RF Attenuators are high-power RF and microwave terminations designed to safely absorb RF energy in demanding test systems. These units feature broadband coverage up to 18 GHz and power handling capability up to 1000 W CW for maximum reliability. Their rugged construction makes them ideal for continuous EMC operation and amplifier protection.

Key Specifications & Features

  • Frequency Range: DC up to 18 GHz (model dependent)
  • Power Handling: 100 W to 1000 W CW
  • Attenuation: Fixed 40 dB for precise signal reduction
  • VSWR: Low VSWR over wide frequency ranges
  • Design: Thermally robust for continuous operation
  • Applications: EMC testing, system verification, and power testing
  • Reliability: Rugged construction for harsh environments
  • Support: Backed by AMETEK / AR RF & Microwave service
Overview & Applications
BrandAR RF / Microwave Instrumentation
Frequency RangeDC / kHz to 18 GHz
Power handling100 W to multi-kilowatt CW
TypeRF load attenuators and terminations
PerformanceLow VSWR, broadband
  • LA100 Load Attenuator, 100 W, DC – 18 GHz, 40 dB LA1000 Load Attenuator, 1000 W, DC – 3 GHz, 40 dB LA150 Load Attenuator, 150 W, DC – 6 GHz, 40 dB Safe absorption of high RF power
  • Low VSWR over wide frequency ranges
  • Suitable for continuous EMC operation
  • Rugged, thermally robust design
  • Supported by AMETEK / AR RF & Microwave with local service in Europe View Models & Options Request for quote Looking for a custom solution or a tailored offer? Please fill out the form below, and we’ll get back to you as soon as possible with a personalized quote. Name *

LA series RF Attenuators


The AR LA series Load Attenuators are essential components for high-power RF and microwave testing, providing a safe and stable means to absorb energy. These terminations are commonly utilized in EMC test setups, amplifier protection, and system verification where signal integrity is paramount. By offering fixed attenuation, they allow for the monitoring of high-power signals using standard test equipment without risk of damage.

Engineered for durability, these attenuators feature a rugged, thermally robust design that ensures performance stability even during continuous operation. The broadband, low VSWR construction minimizes signal reflections, ensuring that the load remains consistent across the entire frequency spectrum. This high-power capability makes them suitable for both laboratory environments and demanding industrial power testing applications.

The series includes a variety of models to suit specific power and frequency requirements, such as the LA100, LA150, and the high-capacity LA1000. Frequency ranges extend from DC up to 18 GHz, with power handling options ranging from 100 W to 1000 W CW levels. Supported by AMETEK / AR RF & Microwave, these attenuators represent a reliable choice for professionals requiring precise and safe RF energy management.

High Power Handling

Supports loads from 100 W to 1000 W CW for demanding test environments.

Wide Frequency Range

Broadband performance covering DC up to 18 GHz for various measurement setups.

Low VSWR Design

Minimizes signal reflections to ensure reliable and accurate system measurements.

Rugged Construction

Built for durability and continuous operation in demanding EMC test applications.

View Models & Options

High-Power Thermal Management

The LA series is specifically engineered for safe absorption of high RF power levels during continuous EMC operation. The rugged and thermally robust design prevents performance degradation even when subjected to multi-kilowatt CW loads.

Broadband Performance and Versatility

These attenuators deliver low VSWR over wide frequency ranges, extending from DC up to 18 GHz depending on the specific model. This versatility makes them ideal for a range of applications including amplifier protection, system verification, and general power testing.

Request for quote

Looking for a custom solution or a tailored offer? Please fill out the form below, and we’ll get back to you as soon as possible with a personalized quote.

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