The Keysight E281CS is an in-line coaxial to waveguide adapter that bridges 1.0 mm coaxial connectors to WR-12 waveguide interfaces for E-band measurements. Operating across 60 GHz to 90 GHz, it enables direct integration of coaxial test equipment into waveguide-based millimeter-wave systems without sacrificing signal integrity.
Technical Specifications
• Frequency Range: 60 GHz to 90 GHz (E-band)
• Coaxial Connector: 1.0 mm female
• Waveguide: WR-12 flange
• Insertion Loss (Typical): 0.7 dB
• Return Loss (Typical): 16 dB
• Maximum Continuous Power: 10 W
– Key Features
• Dual-interface design connects coaxial and waveguide domains in a single inline component
• Low insertion loss of 0.7 dB maintains measurement accuracy across the E-band spectrum
• 16 dB return loss provides impedance matching suitable for network analyzer applications
• Rated for 10 W CW operation, accommodating moderate to high-power test scenarios
– Typical Applications
• E-band component and device characterization (60–90 GHz)
• RF and microwave network analyzer setups requiring coaxial-to-waveguide conversion
• Millimeter-wave subsystem integration and validation
• Waveguide device measurement where coaxial test sources are the primary interface
– Compatibility & Integration
The E281CS is engineered for use with Keysight test platforms and third-party equipment utilizing 1.0 mm coaxial connectors and WR-12 waveguide architecture. It integrates directly into RF and microwave network analyzer configurations, enabling seamless transition between coaxial measurement infrastructure and waveguide device under test.
