The Keysight F9651A is a multi-probe Compact Antenna Test Range (CATR) chamber engineered for 5G FR2 device characterization at millimeter-wave frequencies. This shielded anechoic chamber provides a controlled measurement environment for RF in-band, spurious, and RRM testing aligned with 3GPP standards and certification body requirements (GCF, PTCRB, CTIA). The system supports up to 2 Angles of Arrival tests and accommodates quiet zones of 30 cm or 40 cm diameter.
Technical Specifications
Frequency Coverage & Performance
• In-band frequency range: 24–42 GHz or 24–55 GHz (configurable)
• Spurious measurement range: 6–110 GHz (with in-band 24–42 GHz or 24–55 GHz)
• Cross-polarization isolation: 30 dB nominal
Auxiliary Horn Specifications (F9651A-AG1)
• Amplitude variation: 1.9 dB @ 24 GHz, 1.8 dB @ 32 GHz, 2.5 dB @ 41 GHz
• Phase variation: 5.5° @ 24 GHz, 5.5° @ 32 GHz, 7.0° @ 41 GHz
• Path loss: 51 dB @ 24 GHz, 52 dB @ 32 GHz, 53 dB @ 41 GHz
Chamber Architecture
• 1 primary CATR with rolled-edge parabolic reflector and dual-polarized feed horn
• 3 auxiliary CATRs with rolled-edge parabolic reflectors and dual-polarized feed horn assemblies
• Quiet zone diameter: 30 cm nominal (30 cm or 40 cm options available)
– Key Features
• Roll-over-azimuth DUT positioner with dedicated controller for feed and DUT motion
• Dual-polarized probe feed assemblies covering in-band and spurious test ranges
• Triggered data acquisition capability integrated with positioner control
• LED chamber lighting and USB camera for DUT monitoring
• Crosshair laser alignment guide for precise DUT positioning
• Calibration kits available for chamber validation
• Optional FR1 and FR2 link antenna configurations
– Typical Applications
• 5G FR2 device design verification per 3GPP specifications
• Device acceptance testing for GCF, PTCRB, and CTIA certification
• Wireless and antenna system performance characterization
• Over-the-air RF, spurious emission, and RRM measurement campaigns
• Multi-angle arrival testing for advanced antenna configurations
– Compatibility & Integration
The F9651A supports flexible platform configuration with modular probe feed assemblies and optional upgrades to meet specific test requirements. Chamber validation aligns with IEEE 149 Recommended Practice for Antenna Measurements.
