The 7948B2 is a male 2.4mm connector shielded coaxial open circuit calibration standard for vector network analyzers, designed to provide a nominal 180° phase offset with a phase accuracy of ±2.0° from DC to 50.0 GHz. It features a captivated center conductor contact flush with the outer conductor mating plane to eliminate dependence on test port connector tolerances and improve repeatability. Effective capacitance versus frequency is characterized by a fourth-order polynomial curve fit, with coefficients provided for each unit.
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.
| Maury Microwave | |
|---|---|
| Product Category | Calibration Instruments |
| Product Number | 7948B2 |
| Product Name | VNA Calibration Standard |
| Calibration Signal | Signal / Waveform Generator Output |
