The Agilent/Keysight 11971T is a waveguide harmonic mixer for millimeter-wave signal downconversion, enabling spectrum analyzer measurements beyond native frequency capabilities. This dual-diode design delivers flat frequency response and low conversion loss without external DC bias or tuning stubs, making it ideal for high-frequency metrology and signal analysis applications.
Technical Specifications
Frequency Range: 18 GHz to 40 GHz
Local Oscillator Frequency: 2.0 GHz to 4.5 GHz
LO Power Requirement: +14 to +18 dBm at mixer input. Optimal frequency response and amplitude accuracy achieved at 14.5 to 16 dBm. When LO power varies between 14 to 18 dBm, add ±1 dB to frequency response and amplitude accuracy specifications.
Input Survivability: Up to 100 milliwatts (+20 dBm) without diode damage
Waveguide Input SWR: Typically 2.2:1
Waveguide Flange: UG-599/U type
– Key Features
• Dual-diode design eliminates need for external DC bias or tuning stubs
• Low conversion loss across operating band
• Rugged construction: survives 30 G shocks and MIL-STD 28800C Type III Class 3 vibration testing
• Minimized SWR (2.2:1 typical) reduces measurement uncertainty
• Compatible with external LO amplifiers such as HP Model 11975A
– Typical Applications
Millimeter-wave signal analysis, high-frequency metrology, RF component characterization, and broadband spectral measurements in the 18–40 GHz band when paired with compatible spectrum analyzers.
– Compatibility & Integration
Fully compatible with Keysight spectrum analyzers including Agilent E4407B ESA-E (Option AYZ), 8560E/EC Series, 8566B (with preamplifier), 71000 Series, PSA Series (Option AYZ), and N9030A PXA signal analyzer. Requires external LO amplification to deliver specified +14 to +18 dBm power levels.
