Shielded, coaxial opens are used in the calibration of vector network analyzers to provide a nominal 180° phase offset from a compatible reference short over a wide range of frequencies. At these frequencies, open circuit terminations are inherently imperfect. Shielding the open essentially eliminates radiation loss, but creates a residual frequency-sensitive capacitance. An accurate knowledge of the open’s effective capacitance is essential to an accurate calibration of the analyzer. Maury opens are characterized for effective capacitance versus frequency by means of a fourth order polynomial curve fit, and the nominal capacitance coefficients are provided with each unit.
Features and Benefits
- Calibration-grade metrology standards
- Used for VNA calibration and/or calibration validation
Key Specifications
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FREQUENCY RANGEDC to 50 GHz
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REFLECTION COEFFICIENT0.98 to 0.995
Models Table
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NameDescriptionFrequency Range (GHz)Reflection CoefficientConnector 1Gender 1
371N2 – DC-10 0.98 BNC Female 371P2 – DC-10 0.98 BNC Male 2616D4 – DC-18 0.995 7mm – 2616F1 – DC-18 0.995 7mm – 7948A2 – DC-50 0.98 2.4mm Female 7948B2 – DC-50 0.98 2.4mm Male 8048A6 – DC-26.5 0.98 3.5mm Female 8048B6 – DC-26.5 0.98 3.5mm Male 8585A1 – DC-12 0.98 BNC 75Ω Female 8585B1 – DC-12 0.98 BNC 75Ω Male 8609B – DC-18 0.98 TNC Female 8610B – DC-18 0.98 TNC Male 8685A – DC-20 0.98 AFTNC Female 8685B – DC-20 0.98 AFTNC Male 8773A1 – DC-40 0.98 2.92mm Female 8773A4 – DC-40 0.98 2.92mm Female 8773B1 – DC-40 0.98 2.92mm Male 8773B4 – DC-40 0.98 2.92mm Male 8809B2 – DC-18 0.99 Type N Female 8810B2 – DC-18 0.99 Type N Male