Triangle Microwave CO-361 Directional Coupler SMA RF Microwave Coaxial Component

Triangle Microwave CO-361 Directional Coupler SMA RF Microwave Coaxial Component

The Triangle Microwave CO-361 is a passive coaxial directional coupler in a compact, teal-anodized aluminum housing. It features three SMA female ports labeled IN, OUT, and CPL (coupled port), allowing a portion of the RF signal passing through the main line to be sampled at the coupled port — without significantly disrupting signal flow. The unit is a product of Triangle Microwave Inc., a U.S. manufacturer known for passive RF and microwave components.

Specifications & What's Included

• Model: CO-361
• Manufacturer: Triangle Microwave Inc.
• Type: Directional Coupler (passive RF/microwave)
• Connector Type: SMA female (3 ports)
• Port Labels: IN, OUT, CPL
• Housing: Machined aluminum alloy, teal/blue-green anodized finish
• Form Factor: Compact in-line benchtop module
• Serial Number: 116 (see label on bottom)
• Country of Manufacture: United States
• Included: Unit only — no cables or accessories

Note: Specific frequency range and coupling value (dB) are not printed on the unit and are not confirmed from available data. Please consult Triangle Microwave Inc. documentation for the CO-361 or contact us if you need these specifications before purchasing.

Applications

Directional couplers are standard passive components in RF and microwave systems. They are used to sample a small, known fraction of a signal's power from a transmission line — without materially loading or interrupting the main signal path. Common applications include power monitoring, signal leveling, network analysis, antenna testing, and signal injection in lab bench setups and production RF test systems. The SMA interface makes the CO-361 compatible with a broad range of bench and rack test equipment operating in frequency ranges where SMA is a standard connector (generally DC through 18 GHz or higher, depending on the specific model's rated band). Triangle Microwave Inc. produced a range of passive microwave components — couplers, power dividers, and attenuators — primarily serving defense, aerospace, and commercial RF test markets. Units like the CO-361 are still actively used in RF lab environments, test benches, and signal chain assemblies where a reliable passive coupler is needed.