Passive Millimeter-wave
Advanced Technology for Critical Applications
Trex Enterprises has created state-of-the-art sensors relating to homeland security, national defense and commercial markets. Trex has applied its decades of research and development to create a variety of sensors, which include such capabilities as, the world’s first multi-target laser radar system, security imaging devices, adaptive optics, hazard avoidance systems, and large megapixel camera systems. Furthermore, Trex continues to excel in the development of sensor systems for various customers.
Trex Enterprises is also actively engaged in the development and refinement of advanced celestial navigation technologies. These systems utilize the positioning of celestial bodies to provide highly accurate navigation capabilities, offering significant advantages in scenarios where traditional navigation methods may be limited or unavailable.
We are committed to advancing the state-of-the-art in celestial navigation, continually pushing the boundaries of accuracy and performance. Our research and development efforts are aimed at delivering innovative solutions that meet the evolving needs of our customers.
Passive Millimeter-wave
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Our aviation passive millimeter-wave camera combines the imaging properties of infrared systems with the penetration capabilities of radar. Like an infrared system, there is no minimum or maximum range of the system, only a decrease in spatial resolution with range. The system only needs to focus at the desired distance. Our system produces a recognizable image without extensive computer processing.
Capabilities
- Developed for aircraft enhanced vision
- Produces quality images with no clutter
- “Sees” through opaque materials
- “See” through fog, clouds, rain, and smoke
- Provides day/night adverse weather imaging capability
- Autonomous landing guidance
- Runway incursion detection
- Tactical battlefield reconnaissance
- Search and rescue
- Covert insertion/extraction
- U.S. Customs aviation support
- Maintains radio silence

Imaging through 400 ft. of dense fog at 2,000 ft. range along Hwy 58, Tehachapi, CA in December 1999
Security
Trex Enterprises’ subsidiary, Sago Systems, Inc., develops, manufactures and sells state-of-the-art passive millimeter-wave imaging systems for security applications. We have successfully imaged such contraband as suicide vests, plastic explosives and ceramic guns and knives. Our systems are affordable, non-invasive and operate with existing security systems and infrastructure. Our products are protected by existing patents and subsequent applications.
- Provides real-time stand-off detection of concealed weapons and contraband
- Totally passive operation
- No health and safety issues
- Heat emitted from human body at millimeter-wave penetrates clothing, but is blocked by concealed weapon or contraband
- Size, shape, and directional discrimination
- Clutter-free images
- Metallic and non-metallic article detection
- Explosives (suicide bomber) detection
- Wide area surveillance capability
- Stand-off capability
Concealed Weapons
Sago™ ST-150, is a stand-off detector that can be deployed at mobile checkpoints, building entrances, as a perimeter security device or as a covert contraband detection system. Designed for mobility, the system is lightweight, battery-powered and communicates at a safe stand-off distance over standard wi-fi interfaces to a laptop computer. The acquisition time of images is about two seconds. Our other systems include portals, handheld devices and real-time imagers for personnel screening.
Advantages Over Other Millimeter-wave Products
- Operates with safe stand-off distance
- Lightweight / portable
- Low cost
- Provides clear images of concealed weapons
- Totally passive – safe to user and subjects
- Rugged
Sales information for Sago contact: sagosales@sagosystems.com

Visible and Millimeter-wave Images of Taurus9mm Gun Concealed Under Shirt
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