An attenuator is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform. An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or gain less than 1. Below is a list of attenuator suppliers.

• Trilithic
• HD Communications Corp.
• Mini-Circuits
• Anaren
• Aeroflex Weinschel
• Radiall
• Tyco Electronics
• Waveline, Inc.
• Narda Microwave East
• Coaxicom