The Tektronix WM782U is a harmonic mixer that extends spectrum analyzer measurement capabilities into the millimeter-wave band by downconverting high-frequency RF signals to intermediate frequencies processable by the analyzer. Operating across the 40–60 GHz range, it employs WR-19 waveguide with UG-383/U-M flange architecture to enable harmonic mixing in Ka-band applications where native analyzer limits (typically 21–22 GHz) would otherwise restrict measurement scope.
Technical Specifications
• Frequency Range: 40–60 GHz
• RF Input Waveguide: WR-19 with UG-383/U-M flange
• Waveguide Dimensions: WR-19 designation (long dimension 0.19 inches / ~4.83 mm; height half the width)
• Conversion Loss: Typical –115 dB
– Key Features
• Harmonic mixing topology enabling extension of spectrum analyzer bandwidth into the 40–60 GHz band
• WR-19 waveguide input for efficient RF signal coupling in millimeter-wave frequencies
• Integration with external LO (local oscillator) harmonics for signal downconversion
• Compact waveguide form factor suitable for bench and rack-mounted analyzer configurations
– Compatibility & Integration
The WM782U is engineered for Tektronix 2780-series spectrum analyzers, including the 2782 and 2784 models. External harmonic mixers of this class serve as necessary extensions when analyzer internal mixer frequency limits are exceeded. Compatible applications may require evaluation of external diplexer requirements depending on analyzer architecture. Related WM780-series devices maintain compatibility with 49X-, 475X-, and 279X-series analyzer platforms, suggesting potential broader integration scope for the WM782 series. Performance equivalency has been noted relative to OML harmonic mixer designs used across multi-manufacturer analyzer ecosystems.
– Typical Applications
Millimeter-wave signal characterization in communications, radar systems, and satellite technology operates within the WM782U’s native measurement band. Ka-band frequency analysis, high-frequency component testing, and spectral monitoring of advanced RF systems represent primary use cases where native analyzer bandwidth proves insufficient.
