Heaviside MOTH Spectrum Analyzer

History

The Heaviside MOTH is a compact ruggedized spectrum analyzer designed to detect and analyze radio-frequency signals in battlefield environments. The handheld device can support detection of drone control links, radios, and other emitters across a frequency range from 5 MHz to 6 GHz.

MOTH is manufactured by Heaviside Industries, a company based in Marina del Rey, California. The device combines spectrum analysis with direction finding, GPS, vibration alerts, and a portable enclosure intended for use by individual personnel.

In 2026, the U.S. Army awarded Heaviside Industries an indefinite-delivery contract valued at up to $99 million for MOTH spectrum analyzers. The contract extends through August 27, 2031 and covers procurement, fielding, upgrades, and maintenance of the devices.

Development and Army procurement

MOTH was publicly described in July 2026 as a ruggedized tactical spectrum analyzer. Its small size and low weight allow it to be carried by hand, mounted on a vest, or transported in a pack. The system was presented as a tool for Cyber ElectroMagnetic Activities personnel as well as other users requiring frequency information and a line of bearing to a signal of interest.

The Army procurement followed an online competition in which 99 companies submitted bids. Under the resulting contract, work locations are to be determined by individual task orders. The maximum contract value is $99 million rather than a confirmed purchase value for a fixed quantity of devices.

Commercial reporting in 2026 placed the unit price below $5,000, with one retailer listing a MOTH unit at approximately $4,950. The available sources do not specify the number of systems that the Army will ultimately acquire.

Design

MOTH is a handheld radio-frequency spectrum analyzer intended to detect emissions between 5 MHz and 6 GHz. This frequency coverage allows the system to observe many types of communications signals, including radio links associated with unmanned aircraft.

The analyzer incorporates a direction-finding mode that provides line-of-bearing information for detected signals. It also supports real-time signal oscillation display, built-in GPS, and vibration notifications that can alert the user without relying only on the screen.

The device measures 5.78 by 3.3 by 1.8 inches and weighs 0.99 lb with its battery installed. Its enclosure is rated IP67 for protection against water and dust. The stated operating temperature range is 14 to 131 degrees Fahrenheit.

MOTH also supports integration with the Android Team Awareness Kit, or ATAK. The available sources describe it as sufficiently straightforward for use beyond dedicated electronic-warfare specialists when personnel need frequency-use information or direction to a signal of interest.

Program status

As of August 2026, MOTH was the subject of a U.S. Army contract with a maximum value of $99 million. The contract is scheduled to run through August 27, 2031 and provides for procurement, fielding, upgrading, and maintenance. Individual task orders will determine specific work locations and requirements.

The available sources do not provide a confirmed Army acquisition quantity, delivery schedule, or list of units receiving the equipment.

Specifications (MOTH Ruggedized Tactical Spectrum Analyzer)

General characteristics

• Manufacturer: Heaviside Industries
• Type: Handheld ruggedized tactical spectrum analyzer
• Dimensions: 5.78 × 3.3 × 1.8 in
• Weight: 0.99 lb with battery
• Environmental protection: IP67
• Operating temperature: 14 to 131 degrees Fahrenheit

Electronic capabilities

• Frequency detection range: 5 MHz to 6 GHz
• Direction finding: Built-in direction-finding mode providing line-of-bearing information
• Positioning: Built-in GPS
• Alerts: Vibration notifications
• Display function: Real-time signal oscillation
• Software integration: ATAK integration

Sources

Information on the Army contract and procurement was reported by Defence Blog. Technical characteristics and field-use information were described by Soldier Systems Daily.